staging: ktap: remove code from tree

ktap should be merged through the "proper" place in the kernel tree, in
the perf tool, not as a stand-alone kernel module in staging.  So remove
it from here for now so that it can be merged correctly later.

Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: Jovi Zhangwei <jovi.zhangwei@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

79 files changed, 0 insertions, 16368 deletions

diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 3b1501b..3bfdaa8 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -150,6 +150,4 @@ source "drivers/staging/dgnc/Kconfig"
 
 source "drivers/staging/dgap/Kconfig"
 
-source "drivers/staging/ktap/Kconfig"
-
 endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 2270ed0..b0d3303 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -67,4 +67,3 @@ obj-$(CONFIG_XILLYBUS)		+= xillybus/
 obj-$(CONFIG_DGNC)			+= dgnc/
 obj-$(CONFIG_DGAP)			+= dgap/
 obj-$(CONFIG_MTD_SPINAND_MT29F)	+= mt29f_spinand/
-obj-$(CONFIG_KTAP)		+= ktap/
diff --git a/drivers/staging/ktap/Kconfig b/drivers/staging/ktap/Kconfig
deleted file mode 100644
index 21f8d2e..0000000
--- a/drivers/staging/ktap/Kconfig
+++ /dev/null
@@ -1,21 +0,0 @@
-config KTAP
-	tristate "a programable dynamic tracing tool for Linux"
-	depends on PERF_EVENTS && EVENT_TRACING
-	default n
-	help
-	  ktap is a new script-based dynamic tracing tool for Linux,
-	  it uses a scripting language and lets users trace the
-	  Linux kernel dynamically. ktap is designed to give
-	  operational insights with interoperability that allow
-	  users to tune, troubleshoot and extend kernel and application.
-	  It's similar with Linux Systemtap and Solaris Dtrace.
-
-	  ktap have different design principles from Linux mainstream
-	  dynamic tracing language in that it's based on bytecode,
-	  so it doesn't depend upon GCC, doesn't require compiling
-	  kernel module for each script, safe to use in production
-	  environment, fulfilling the embedded ecosystem's tracing needs.
-
-	  See ktap tutorial for more information:
-	      http://www.ktap.org/doc/tutorial.html
-
diff --git a/drivers/staging/ktap/Makefile b/drivers/staging/ktap/Makefile
deleted file mode 100644
index e2e54ba..0000000
--- a/drivers/staging/ktap/Makefile
+++ /dev/null
@@ -1,101 +0,0 @@
-
-# Do not instrument the tracer itself:
-ifdef CONFIG_FUNCTION_TRACER
-ORIG_CFLAGS := $(KBUILD_CFLAGS)
-KBUILD_CFLAGS = $(subst -pg,,$(ORIG_CFLAGS))
-endif
-
-all: mod ktap
-
-INTP = interpreter
-
-LIBDIR = $(INTP)/library
-
-LIB_OBJS += $(LIBDIR)/baselib.o $(LIBDIR)/kdebug.o $(LIBDIR)/timer.o \
-		$(LIBDIR)/ansilib.o
-
-INTP_OBJS += $(INTP)/ktap.o $(INTP)/loader.o $(INTP)/object.o \
-		$(INTP)/tstring.o $(INTP)/table.o $(INTP)/vm.o \
-		$(INTP)/opcode.o $(INTP)/strfmt.o $(INTP)/transport.o \
-		$(LIB_OBJS)
-
-obj-m		+= ktapvm.o
-ktapvm-y	:= $(INTP_OBJS)
-
-KVERSION ?= $(shell uname -r)
-KERNEL_SRC ?= /lib/modules/$(KVERSION)/build
-mod:
-	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) modules
-
-modules_install:
-	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) modules_install
-
-KTAPC_CFLAGS = -Wall -O2
-
-UDIR = userspace
-
-$(UDIR)/lex.o: $(UDIR)/lex.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/parser.o: $(UDIR)/parser.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/code.o: $(UDIR)/code.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/dump.o: $(UDIR)/dump.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/main.o: $(UDIR)/main.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/util.o: $(UDIR)/util.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/ktapio.o: $(UDIR)/ktapio.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/eventdef.o: $(UDIR)/eventdef.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/opcode.o: $(INTP)/opcode.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/table.o: $(INTP)/table.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/tstring.o: $(INTP)/tstring.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-$(UDIR)/object.o: $(INTP)/object.c
-	$(QUIET_CC)$(CC) $(DEBUGINFO_FLAG) $(KTAPC_CFLAGS) -o $@ -c $<
-
-KTAPOBJS =
-KTAPOBJS += $(UDIR)/lex.o
-KTAPOBJS += $(UDIR)/parser.o
-KTAPOBJS += $(UDIR)/code.o
-KTAPOBJS += $(UDIR)/dump.o
-KTAPOBJS += $(UDIR)/main.o
-KTAPOBJS += $(UDIR)/util.o
-KTAPOBJS += $(UDIR)/ktapio.o
-KTAPOBJS += $(UDIR)/eventdef.o
-KTAPOBJS += $(UDIR)/opcode.o
-KTAPOBJS += $(UDIR)/table.o
-KTAPOBJS += $(UDIR)/tstring.o
-KTAPOBJS += $(UDIR)/object.o
-
-ktap: $(KTAPOBJS)
-	$(QUIET_LINK)$(CC) $(KTAPC_CFLAGS) -o $@ $(KTAPOBJS) -lpthread
-
-KMISC := /lib/modules/$(KVERSION)/ktapvm/
-
-install: mod ktap
-	install -d $(KMISC)
-	install -m 644 -c *.ko /lib/modules/$(KVERSION)/ktapvm/
-	/sbin/depmod -a
-
-load:
-	insmod ktapvm.ko
-
-unload:
-	rmmod ktapvm
-
-test: FORCE
-	cd test; sh ./run_test.sh; cd -
-
-clean:
-	$(MAKE) -C $(KERNEL_SRC) M=$(PWD) clean
-	$(RM) ktap
-
-PHONY += FORCE
-FORCE:
-
diff --git a/drivers/staging/ktap/README.md b/drivers/staging/ktap/README.md
deleted file mode 100644
index c8ddd5f..0000000
--- a/drivers/staging/ktap/README.md
+++ /dev/null
@@ -1,144 +0,0 @@
-# ktap
-
-A New Scripting Dynamic Tracing Tool For Linux  
-[www.ktap.org][homepage]
-
-ktap is a new scripting dynamic tracing tool for Linux,
-it uses a scripting language and lets users trace the Linux kernel dynamically.
-ktap is designed to give operational insights with interoperability
-that allows users to tune, troubleshoot and extend kernel and application.
-It's similar with Linux Systemtap and Solaris Dtrace.
-
-ktap have different design principles from Linux mainstream dynamic tracing
-language in that it's based on bytecode, so it doesn't depend upon GCC,
-doesn't require compiling kernel module for each script, safe to use in
-production environment, fulfilling the embedded ecosystem's tracing needs.
-
-More information can be found at [ktap homepage][homepage].
-
-[homepage]: http://www.ktap.org
-
-## Highlights
-
-  * simple but powerful scripting language
-  * register based interpreter (heavily optimized) in Linux kernel
-  * small and lightweight (6KLOC of interpreter)
-  * not depend on gcc for each script running
-  * easy to use in embedded environment without debugging info
-  * support for tracepoint, kprobe, uprobe, function trace, timer, and more
-  * supported in x86, arm, ppc, mips
-  * safety in sandbox
-
-## Building & Running
-
-1. Clone ktap from github
-
-        $ git clone http://github.com/ktap/ktap.git
-
-2. Compiling ktap
-
-        $ cd ktap
-        $ make       #generate ktapvm kernel module and ktap binary
-
-3. Load ktapvm kernel module(make sure debugfs mounted)
-
-        $ make load  #need to be root or have sudo access
-
-4. Running ktap
-
-        $ ./ktap scripts/helloworld.kp
-
-
-## Examples
-
-1. simplest one-liner command to enable all tracepoints
-
-        ktap -e "trace *:* { print(argevent) }"
-
-2. syscall tracing on target process
-
-        ktap -e "trace syscalls:* { print(argevent) }" -- ls
-
-3. function tracing
-
-        ktap -e "trace ftrace:function { print(argevent) }"
-
-        ktap -e "trace ftrace:function /ip==mutex*/ { print(argevent) }"
-
-4. simple syscall tracing
-
-        trace syscalls:* {
-                print(cpu(), pid(), execname(), argevent)
-        }
-
-5. syscall tracing in histogram style
-
-        s = {}
-
-        trace syscalls:sys_enter_* {
-                s[argname] += 1
-        }
-
-        trace_end {
-                histogram(s)
-        }
-
-6. kprobe tracing
-
-        trace probe:do_sys_open dfd=%di fname=%dx flags=%cx mode=+4($stack) {
-                print("entry:", execname(), argevent)
-        }
-
-        trace probe:do_sys_open%return fd=$retval {
-                print("exit:", execname(), argevent)
-        }
-
-7. uprobe tracing
-
-        trace probe:/lib/libc.so.6:0x000773c0 {
-                print("entry:", execname(), argevent)
-        }
-
-        trace probe:/lib/libc.so.6:0x000773c0%return {
-                print("exit:", execname(), argevent)
-        }
-
-8. timer
-
-        tick-1ms {
-                printf("time fired on one cpu\n");
-        }
-
-        profile-2s {
-                printf("time fired on every cpu\n");
-        }
-
-More sample scripts can be found at scripts/ directory.
-
-## Mailing list
-
-ktap@freelists.org  
-You can subscribe to ktap mailing list at link (subscribe before posting):
-http://www.freelists.org/list/ktap
-
-
-## Copyright and License
-
-ktap is licensed under GPL v2
-
-Copyright (C) 2012-2013, Jovi Zhangwei <jovi.zhangwei@gmail.com>.
-All rights reserved.  
-
-
-## Contribution
-
-ktap is still under active development, so contributions are welcome.
-You are encouraged to report bugs, provide feedback, send feature request,
-or hack on it.
-
-
-## See More
-
-More info can be found at [documentation][tutorial]
-[tutorial]: http://www.ktap.org/doc/tutorial.html
-
diff --git a/drivers/staging/ktap/doc/tutorial.md b/drivers/staging/ktap/doc/tutorial.md
deleted file mode 100644
index 3c32ce7..0000000
--- a/drivers/staging/ktap/doc/tutorial.md
+++ /dev/null
@@ -1,552 +0,0 @@
-% The ktap Tutorial
-
-# Introduction
-
-ktap is a new scripting dynamic tracing tool for linux
-
-ktap is a new scripting dynamic tracing tool for Linux,
-it uses a scripting language and lets users trace the Linux kernel dynamically.
-ktap is designed to give operational insights with interoperability
-that allows users to tune, troubleshoot and extend kernel and application.
-It's similar with Linux Systemtap and Solaris Dtrace.
-
-ktap have different design principles from Linux mainstream dynamic tracing
-language in that it's based on bytecode, so it doesn't depend upon GCC,
-doesn't require compiling kernel module for each script, safe to use in
-production environment, fulfilling the embedded ecosystem's tracing needs.
-
-Highlights features:
-
-* simple but powerful scripting language
-* register based interpreter (heavily optimized) in Linux kernel
-* small and lightweight (6KLOC of interpreter)
-* not depend on gcc for each script running
-* easy to use in embedded environment without debugging info
-* support for tracepoint, kprobe, uprobe, function trace, timer, and more
-* supported in x86, arm, ppc, mips
-* safety in sandbox
-
-
-# Getting started
-
-Requirements
-
-* Linux 3.1 or later(Need some kernel patches for kernel earlier than 3.1)
-* CONFIG_EVENT_TRACING enabled
-* CONFIG_PERF_EVENTS enabled
-* CONFIG_DEBUG_FS enabled  
-  (make sure debugfs mounted before insmod ktapvm  
-   mount debugfs: mount -t debugfs none /sys/kernel/debug/)
-
-Note that those configuration is always enabled in Linux distribution,
-like REHL, Fedora, Ubuntu, etc.
-
-1. Clone ktap from github
-
-        $ git clone http://github.com/ktap/ktap.git
-
-2. Compiling ktap
-
-        $ cd ktap
-        $ make       #generate ktapvm kernel module and ktap binary
-
-3. Load ktapvm kernel module(make sure debugfs mounted)
-
-        $ make load  #need to be root or have sudo access
-
-4. Running ktap
-
-        $ ./ktap scripts/helloworld.kp
-
-
-# Language basics
-
-## Syntax basics
-
-ktap's syntax is design on the mind of C language syntax friendly,
-to make it easy scripting by kernel developer.
-
-1. Variable declaration
-The biggest syntax differences with C is that ktap is a dynamic typed
-language, so you won't need add any variable type declaration, just
-use the variable.
-
-2. function
-All functions in ktap should use keyword "function" declaration
-
-3. comments
-The comments of ktap is starting from '#', long comments doesn't support now.
-
-4. others
-Don't need place any ';' at the ending of statement in ktap.
-ktap use free syntax style, so you can choose to use the ';' or not.
-
-ktap use nil as NULL, the result of any number operate on nil is nil.
-
-ktap don't have array structure, also don't have any pointer operation.
-
-## Control structures
-
-ktap if/else is same as C language.
-
-There have two method of for-loop in ktap:
-
-    for (i = init, limit, step) { body }
-
-this is same as below in C:
-
-    for (i = init; i < limit; i += step) { body }
-
-The next for-loop method is:
-
-    for (k, v in pairs(t)) { body }   # looping all elements of table
-
-Note that ktap don't have "continue" keyword, but C does.
-
-## Date structures
-
-Associative array is heavily used in ktap, it's also called by table.
-
-table declaration:
-
-    t = {}
-
-how to use table:  
-
-    t[1] = 1
-    t[1] = "xxx"
-    t["key"] = 10
-    t["key"] = "value"
-
-    for (k, v in pairs(t)) { body }   # looping all elements of table
-
-
-# Built in functions and librarys
-
-## Built in functions
-
-**print (...)**  
-Receives any number of arguments, and prints their values,
-print is not intended for formatted output, but only as a
-quick way to show a value, typically for debugging.
-For formatted output, use printf.
-
-**printf (fmt, ...)**  
-Similar with C printf, use for format string output.
-
-**pairs (t)**  
-Returns three values: the next function, the table t, and nil,
-so that the construction
-for (k,v in pairs(t)) { body }
-will iterate over all key-value pairs of table t.
-
-**len (t) /len (s)**  
-If the argument is string, return length of string,
-if the argument is table, return counts of table pairs.
-
-**in_interrupt ()**  
-checking is context is interrupt context
-  
-**exit ()**  
-quit ktap executing, similar with exit syscall
-
-**pid ()**  
-return current process pid
-
-**execname ()**  
-return current process exec name string
-
-**cpu ()**  
-return current cpu id
-
-**arch ()**  
-return machine architecture, like x86, arm, etc.
-
-**kernel_v ()**  
-return Linux kernel version string, like 3.9, etc.
-
-**user_string (addr)**  
-Receive userspace address, read string from userspace, return string.
-
-**histogram (t)**  
-Receive table, output table histogram to user.
-
-**curr_task_info (offset, fetch_bytes)**  
-fetch value in field offset of task_struct structure, argument fetch_bytes
-could be 4 or 8, if fetch_bytes is not given, default is 4.
-
-user may need to get field offset by gdb, for example:
-gdb vmlinux
-(gdb)p &(((struct task_struct *)0).prio)
-
-**print_backtrace ()**  
-print current task stack info
-
-
-## Librarys
-
-### Kdebug Library
-
-**kdebug.probe_by_id (event_ids, eventfun)**
-
-This function is underly representation of high level tracing primitive.
-event_ids is the id of all events, it's read from  
-/sys/kernel/debug/tracing/events/$SYS/$EVENT/id
-
-for multi-events tracing, the event_ids is concatenation of all id, for example:
- "2 3 4", seperated by blank space.
-
-The second argument in above examples is a function:  
-function eventfun () { action }
-
-
-**kdebug.probe_end (endfunc)**  
-
-This function is used for invoking a function when tracing end, it will wait
-until user press CTRL+C to stop tracing, then ktap will call endfunc function, 
-user could show tracing results in that function, or do other things.
-
-
-### Timer Library
-
-
-
-# Linux tracing basics
-
-tracepoints, probe, timer  
-filters  
-above explaintion  
-Ring buffer
-
-# Tracing semantics in ktap
-
-## Tracing block
-
-**trace EVENTDEF /FILTER/ { ACTION }**
-
-This is the basic tracing block for ktap, you need to use a specific EVENTDEF
-string, and own event function.
-
-EVENTDEF is compatible with perf(see perf-list), with glob match, for example:
-
-	syscalls:*			trace all syscalls events
-	syscalls:sys_enter_*		trace all syscalls entry events
-	kmem:*				trace all kmem related events
-	sched:*				trace all sched related events
-	*:*				trace all tracepoints in system.
-
-All events are based on: /sys/kernel/debug/tracing/events/$SYS/$EVENT
-
-**trace_end { ACTION }**
-
-This is based on kdebug.probe_end function.
-
-## Tracing built-in variable  
-
-**argevent**  
-event object, you can print it by: print(argevent), it will print events
-into human readable string, the result is mostly same as each entry of
-/sys/kernel/debug/tracing/trace
-
-**argname**  
-event name, each event have a name associated with it.
-
-**arg1..9**  
-get argument 1..9 of event object.
-
-
-## Timer syntax
-
-**tick-Ns        { ACTION }**  
-**tick-Nsec      { ACTION }**  
-**tick-Nms       { ACTION }**  
-**tick-Nmsec     { ACTION }**  
-**tick-Nus       { ACTION }**  
-**tick-Nusec     { ACTION }**
-
-**profile-Ns     { ACTION }**  
-**profile-Nsec   { ACTION }**  
-**profile-Nms    { ACTION }**  
-**profile-Nmsec  { ACTION }**  
-**profile-Nus    { ACTION }**  
-**profile-Nusec  { ACTION }**  
-
-architecture overview picture reference(pnp format)  
-one-liners  
-simple event tracing
-
-# Advanced tracing pattern
-
-Aggregation/Histogram  
-thread local  
-flame graph
-
-# Overhead/Performance
-
-ktap have more fast boot time thant Systemtap(try the helloword script)  
-ktap have little memory usage than Systemtap  
-and some scripts show that ktap have a little overhead then Systemtap
-(we choosed two scripts to compare, function profile, stack profile.
-this is not means all scripts in Systemtap have big overhead than ktap)
-
-
-# FAQ
-
-**Q: Why use bytecode design?**  
-A: Using bytecode would be a clean and lightweight solution,
-   you don't need gcc toolchain to compile every scripts, all you
-   need is a ktapvm kernel modules and userspace tool called ktap.
-   Since its language virtual machine design, it have great portability,
-   suppose you are working at a multi-arch cluster, if you want to run
-   a tracing script on each board, you won't need cross-compile tracing
-   script onto all board, what you really need to do is use ktap tool
-   to run script just in time.
-
-   Bytecode based design also will make executing more safer, than native code
-   generation.
-
-   Reality already showing that SystemTap is not widely used in embedded Linux,
-   caused by problem of SystemTap's architecture design choice, it's a natural
-   design for Redhat and IBM, because Redhat/IBM is focusing on server area,
-   not embedded area.
-
-**Q: What's the differences with SystemTap and Dtrace?**  
-A: For SystemTap, the answer is already mentioned at above question,
-   SystemTap use translator design, for trade-off on performance with usability,
-   based on GCC, that's what ktap want to solve.
-
-   For Dtrace, one common design with Dtrace is also use bytecode, so basically
-   Dtrace and ktap is on the same road. There have some projects aim to porting
-   Dtrace from Solaris to Linux, but the process is still on the road, Dtrace
-   is rooted in Solaris, and there have many huge differences between Solaris
-   tracing infrastructure with Linux's.
-
-   Dtrace is based on D language, a language subset of C, it's a restricted
-   language, like without for-looping, for safty use in production system.
-   It seems that Dtrace for Linux only support x86 architecture, not work on
-   powerpc and arm/mips, obviously it's not suit for embedded Linux currently.
-
-   Dtrace use ctf as input for debuginfo handing, compare with vmlinux for
-   SystemTap.
-
-   On the license part, Dtrace is released as CDDL, which is incompatible with
-   GPL(this is why it's impossible to upstream Dtrace into mainline).
-
-**Q: Why use dynamically typed language? but not statically typed language?**  
-A: It's hard to say which one is more better than other, dynamically typed
-   language bring efficiency and fast prototype production, but loosing type
-   check at compiling phase, and easy to make mistake in runtime, also it's
-   need many runtime checking, In contrast, statically typed language win on
-   programing safety, and performance. Statically language would suit for
-   interoperate with kernel, as kernel is wrote mainly in C, Need to note that
-   SystemTap and Dtrace both is statically language.
-
-   ktap choose dynamically typed language as initial implementation.
-
-**Q: Why we need ktap for event tracing? There already have a built-in ftrace**  
-A: This also is a common question for all dynamic tracing tool, not only ktap.
-   ktap provide more flexibility than built-in tracing infrastructure. Suppose
-   you need print a global variable when tracepoint hit, or you want print
-   backtrace, even more, you want to store some info into associative array, and
-   display it in histogram style when tracing end, in these case, some of them
-   ftrace can take it, some of them ftrace can not.
-   Overall, ktap provide you with great flexibility to scripting your own trace
-   need.
-
-**Q: How about the performance? Is ktap slow?**  
-A: ktap is not slow, the bytecode is very high-level, based on lua, the language
-   virtual machine is register-based(compare with stack-based), with little
-   instruction, the table data structure is heavily optimized in ktapvm.
-   ktap use per-cpu allocation in many place, without global locking scheme,
-   it's very fast when executing tracepoint callback.
-   Performance benchmark showing that the overhead of ktap running is nearly
-   10%(store event name into associative array), compare with full speed
-   running without any tracepoint enabled.
-
-   ktap will optimize overhead all the time, hopefully the overhead will
-   decrease to little than 5%, even more.
-
-**Q: Why not porting a high level language implementation into kernel directly?
-   Like python/JVM?**  
-A: I take serious on the size of vm and memory footprint. Python vm is large,
-   it's not suit to embed into kernel, and python have some functionality
-   which we don't need.
-
-   The bytecode of other high level language is also big, ktap only have 32
-   bytecodes, python/java/erlang have nearly two hundred bytecodes.
-   There also have some problems when porting those language into kernel,
-   userspace programming have many differences with kernel programming,
-   like float numbers, handle sleeping code carefully in kernel, deadloop is
-   not allowed in kernel, multi-thread management, etc.., so it's impossible
-   to porting language implementation into kernel with little adaption work.
-
-**Q: What's the status of ktap now?**  
-A: Basically it works on x86-32, x86-64, powerpc, arm, it also could work for
-   other hardware architecture, but not proven yet(I don't have enough hardware
-   to test)
-   If you found some bug, fix it on you own programming skill, or report to me.
-
-**Q: How to hack ktap? I want to write some extensions onto ktap.**  
-A: welcome hacking.  
-   You can write your own library to fulfill your specific need,
-   you can write any script as you want.
-
-**Q: What's the plan of ktap? any roadmap?**  
-A: the current plan is deliver stable ktapvm kernel modules, more ktap script,
-   and bugfix.
-
-
-# References
-
-* [Linux Performance Analysis and Tools][LPAT]
-* [Dtrace Blog][dtraceblog]
-* [Dtrace User Guide][dug]
-* [LWN: ktap -- yet another kernel tracer][lwn]
-* [ktap introduction in LinuxCon Japan 2013][lcj]
-
-[LPAT]: http://www.brendangregg.com/Slides/SCaLE_Linux_Performance2013.pdf
-[dtraceblog]: http://dtrace.org/blogs/
-[dug]: http://docs.huihoo.com/opensolaris/dtrace-user-guide/html/index.html
-[lwn]: http://lwn.net/Articles/551314/
-[lcj]: http://events.linuxfoundation.org/sites/events/files/lcjpcojp13_zhangwei.pdf
-
-
-# History
-
-* ktap was invented at 2002
-* First RFC sent to LKML at 2012.12.31
-* The code was released in github at 2013.01.18
-* ktap released v0.1 at 2013.05.21
-* ktap released v0.2 at 2013.07.31
-
-For more release info, please look at RELEASES.txt in project root directory.
-
-# Sample scripts
-
-1. simplest one-liner command to enable all tracepoints
-
-        ktap -e "trace *:* { print(argevent) }"
-
-2. syscall tracing on target process
-
-        ktap -e "trace syscalls:* { print(argevent) }" -- ls
-
-3. function tracing
-
-        ktap -e "trace ftrace:function { print(argevent) }"
-
-        ktap -e "trace ftrace:function /ip==mutex*/ { print(argevent) }"
-
-4. simple syscall tracing
-
-        trace syscalls:* {
-                print(cpu(), pid(), execname(), argevent)
-        }
-
-5. syscall tracing in histogram style
-
-        s = {}
-
-        trace syscalls:sys_enter_* {
-                s[argname] += 1
-        }
-
-        trace_end {
-                histogram(s)
-        }
-
-6. kprobe tracing
-
-        trace probe:do_sys_open dfd=%di fname=%dx flags=%cx mode=+4($stack) {
-                print("entry:", execname(), argevent)
-        }
-
-        trace probe:do_sys_open%return fd=$retval {
-                print("exit:", execname(), argevent)
-        }
-
-7. uprobe tracing
-
-        trace probe:/lib/libc.so.6:0x000773c0 {
-                print("entry:", execname(), argevent)
-        }
-
-        trace probe:/lib/libc.so.6:0x000773c0%return {
-                print("exit:", execname(), argevent)
-        }
-
-8. timer
-
-        tick-1ms {
-                printf("time fired on one cpu\n");
-        }
-
-        profile-2s {
-                printf("time fired on every cpu\n");
-        }
-
-More sample scripts can be found at scripts/ directory.
-
-
-# Appendix
-
-Here is the complete syntax of ktap in extended BNF.
-(based on lua syntax: http://www.lua.org/manual/5.1/manual.html#5.1)
-
-        chunk ::= {stat [';']} [laststat [';']
-
-        block ::= chunk
-
-        stat ::=  varlist '=' explist | 
-                 functioncall | 
-                 { block } | 
-                 while exp { block } | 
-                 repeat block until exp | 
-                 if exp { block {elseif exp { block }} [else block] } | 
-                 for Name '=' exp ',' exp [',' exp] { block } | 
-                 for namelist in explist { block } | 
-                 function funcname funcbody | 
-                 local function Name funcbody | 
-                 local namelist ['=' explist] 
-
-        laststat ::= return [explist] | break
-
-        funcname ::= Name {'.' Name} [':' Name]
-
-        varlist ::= var {',' var}
-
-        var ::=  Name | prefixexp '[' exp ']'| prefixexp '.' Name 
-
-        namelist ::= Name {',' Name}
-
-        explist ::= {exp ',' exp
-
-        exp ::=  nil | false | true | Number | String | '...' | function | 
-                 prefixexp | tableconstructor | exp binop exp | unop exp 
-
-        prefixexp ::= var | functioncall | '(' exp ')'
-
-        functioncall ::=  prefixexp args | prefixexp ':' Name args 
-
-        args ::=  '(' [explist] ')' | tableconstructor | String 
-
-        function ::= function funcbody
-
-        funcbody ::= '(' [parlist] ')' { block }
-
-        parlist ::= namelist [',' '...'] | '...'
-
-        tableconstructor ::= '{' [fieldlist] '}'
-
-        fieldlist ::= field {fieldsep field} [fieldsep]
-
-        field ::= '[' exp ']' '=' exp | Name '=' exp | exp
-
-        fieldsep ::= ',' | ';'
-
-        binop ::= '+' | '-' | '*' | '/' | '^' | '%' | '..' | 
-                  '<' | '<=' | '>' | '>=' | '==' | '!=' | 
-                  and | or
-
-        unop ::= '-'
-
diff --git a/drivers/staging/ktap/include/ktap.h b/drivers/staging/ktap/include/ktap.h
deleted file mode 100644
index 076dd4a..0000000
--- a/drivers/staging/ktap/include/ktap.h
+++ /dev/null
@@ -1,169 +0,0 @@
-#ifndef __KTAP_H__
-#define __KTAP_H__
-
-#include "ktap_types.h"
-#include "ktap_opcodes.h"
-
-#include <linux/version.h>
-#include <linux/hardirq.h>
-#include <linux/perf_event.h>
-#include <linux/trace_seq.h>
-
-typedef struct ktap_Reg {
-        const char *name;
-        ktap_cfunction func;
-} ktap_Reg;
-
-struct ktap_probe_event {
-	struct list_head list;
-	struct perf_event *perf;
-	ktap_state *ks;
-	ktap_closure *cl;
-};
-
-/* this structure allocate on stack */
-struct ktap_event {
-	struct ktap_probe_event *pevent;
-	struct ftrace_event_call *call;
-	struct trace_entry *entry;
-	int entry_size;
-	struct pt_regs *regs;
-};
-
-enum {
-	KTAP_PERCPU_DATA_STATE,
-	KTAP_PERCPU_DATA_STACK,
-	KTAP_PERCPU_DATA_BUFFER,
-	KTAP_PERCPU_DATA_BUFFER2,
-	KTAP_PERCPU_DATA_BTRACE,
-
-	KTAP_PERCPU_DATA_MAX
-};
-
-#define KTAP_PERCPU_BUFFER_SIZE	(3 * PAGE_SIZE)
-
-int gettimeofday_us(void);
-ktap_state *kp_newstate(struct ktap_parm *parm, struct dentry *dir);
-void kp_exit(ktap_state *ks);
-void kp_final_exit(ktap_state *ks);
-ktap_state *kp_newthread(ktap_state *mainthread);
-void kp_exitthread(ktap_state *ks);
-ktap_closure *kp_load(ktap_state *ks, unsigned char *buff);
-void kp_call(ktap_state *ks, StkId func, int nresults);
-void kp_optimize_code(ktap_state *ks, int level, ktap_proto *f);
-void kp_register_lib(ktap_state *ks, const char *libname, const ktap_Reg *funcs);
-void *kp_percpu_data(int type);
-
-void kp_init_baselib(ktap_state *ks);
-void kp_init_oslib(ktap_state *ks);
-void kp_init_kdebuglib(ktap_state *ks);
-void kp_init_timerlib(ktap_state *ks);
-void kp_init_ansilib(ktap_state *ks);
-
-int kp_probe_init(ktap_state *ks);
-void kp_probe_exit(ktap_state *ks);
-
-void kp_perf_event_register(ktap_state *ks, struct perf_event_attr *attr,
-			    struct task_struct *task, char *filter,
-			    ktap_closure *cl);
-
-void kp_event_getarg(ktap_state *ks, ktap_value *ra, int n);
-void kp_event_tostring(ktap_state *ks, struct trace_seq *seq);
-
-int kp_strfmt(ktap_state *ks, struct trace_seq *seq);
-
-void kp_transport_write(ktap_state *ks, const void *data, size_t length);
-void kp_transport_event_write(ktap_state *ks, struct ktap_event *e);
-void kp_transport_print_backtrace(ktap_state *ks);
-void *kp_transport_reserve(ktap_state *ks, size_t length);
-void kp_transport_exit(ktap_state *ks);
-int kp_transport_init(ktap_state *ks, struct dentry *dir);
-
-void kp_exit_timers(ktap_state *ks);
-
-extern int kp_max_exec_count;
-
-/* get from kernel/trace/trace.h */
-static __always_inline int trace_get_context_bit(void)
-{
-	int bit;
-
-	if (in_interrupt()) {
-		if (in_nmi())
-			bit = 0;
-		else if (in_irq())
-			bit = 1;
-		else
-			bit = 2;
-	} else
-		bit = 3;
-
-	return bit;
-}
-
-/* use a special timer context kp_state instead use this recursion approach? */
-DECLARE_PER_CPU(int, kp_recursion_context[PERF_NR_CONTEXTS]);
-
-static __always_inline int get_recursion_context(void)
-{
-	int rctx = trace_get_context_bit();
-
-	if (__this_cpu_read(kp_recursion_context[rctx]))
-		return -1;
-
-	__this_cpu_write(kp_recursion_context[rctx], true);
-	barrier();
-
-	return rctx;
-}
-
-static inline void put_recursion_context(int rctx)
-{
-	barrier();
-	__this_cpu_write(kp_recursion_context[rctx], false);
-}
-
-
-extern unsigned int kp_stub_exit_instr;
-
-static inline void set_next_as_exit(ktap_state *ks)
-{
-	ktap_callinfo *ci;
-
-	ci = ks->ci;
-	if (!ci)
-		return;
-
-	ci->u.l.savedpc = &kp_stub_exit_instr;
-
-	/* See precall, ci changed to ci->prev after invoke C function */
-	if (ci->prev) {
-		ci = ci->prev;
-		ci->u.l.savedpc = &kp_stub_exit_instr;
-	}
-}
-
-#define kp_verbose_printf(ks, ...) \
-	if (G(ks)->parm->verbose)	\
-		kp_printf(ks, "[verbose] "__VA_ARGS__);
-
-/* get argument operation macro */
-#define kp_arg(ks, n)	((ks)->ci->func + (n))
-#define kp_arg_nr(ks)	((int)(ks->top - (ks->ci->func + 1)))
-
-#define kp_arg_check(ks, narg, type)				\
-	do {							\
-		if (unlikely(ttypenv(kp_arg(ks, narg)) != type)) {	\
-			kp_error(ks, "wrong type of argument %d\n", narg);\
-			return -1;				\
-		}						\
-	} while (0)
-
-
-#if LINUX_VERSION_CODE > KERNEL_VERSION(3, 5, 0)
-#define SPRINT_SYMBOL	sprint_symbol_no_offset
-#else
-#define SPRINT_SYMBOL	sprint_symbol
-#endif
-
-#endif /* __KTAP_H__ */
diff --git a/drivers/staging/ktap/include/ktap_opcodes.h b/drivers/staging/ktap/include/ktap_opcodes.h
deleted file mode 100644
index 31c558b..0000000
--- a/drivers/staging/ktap/include/ktap_opcodes.h
+++ /dev/null
@@ -1,240 +0,0 @@
-#ifndef __KTAP_BYTECODE_H__
-#define __KTAP_BYTECODE_H__
-
-
-/* opcode is copied from lua initially */
- 
-typedef enum {
-/*----------------------------------------------------------------------
- * name            args    description
- * ------------------------------------------------------------------------*/
-OP_MOVE,/*      A B     R(A) := R(B)                                    */
-OP_LOADK,/*     A Bx    R(A) := Kst(Bx)                                 */
-OP_LOADKX,/*    A       R(A) := Kst(extra arg)                          */
-OP_LOADBOOL,/*  A B C   R(A) := (Bool)B; if (C) pc++                    */
-OP_LOADNIL,/*   A B     R(A), R(A+1), ..., R(A+B) := nil                */
-OP_GETUPVAL,/*  A B     R(A) := UpValue[B]                              */
-
-OP_GETTABUP,/*  A B C   R(A) := UpValue[B][RK(C)]                       */
-OP_GETTABLE,/*  A B C   R(A) := R(B)[RK(C)]                             */
-
-OP_SETTABUP,/*  A B C   UpValue[A][RK(B)] := RK(C)                      */
-OP_SETTABUP_INCR,/*  A B C   UpValue[A][RK(B)] += RK(C)                 */
-OP_SETUPVAL,/*  A B     UpValue[B] := R(A)                              */
-OP_SETTABLE,/*  A B C   R(A)[RK(B)] := RK(C)                            */
-OP_SETTABLE_INCR,/*  A B C   R(A)[RK(B)] += RK(C)                       */
-
-OP_NEWTABLE,/*  A B C   R(A) := {} (size = B,C)                         */
-
-OP_SELF,/*      A B C   R(A+1) := R(B); R(A) := R(B)[RK(C)]             */
-
-OP_ADD,/*       A B C   R(A) := RK(B) + RK(C)                           */
-OP_SUB,/*       A B C   R(A) := RK(B) - RK(C)                           */
-OP_MUL,/*       A B C   R(A) := RK(B) * RK(C)                           */
-OP_DIV,/*       A B C   R(A) := RK(B) / RK(C)                           */
-OP_MOD,/*       A B C   R(A) := RK(B) % RK(C)                           */
-OP_POW,/*       A B C   R(A) := RK(B) ^ RK(C)                           */
-OP_UNM,/*       A B     R(A) := -R(B)                                   */
-OP_NOT,/*       A B     R(A) := not R(B)                                */
-OP_LEN,/*       A B     R(A) := length of R(B)                          */
-
-OP_CONCAT,/*    A B C   R(A) := R(B).. ... ..R(C)                       */
-
-OP_JMP,/*       A sBx   pc+=sBx; if (A) close all upvalues >= R(A) + 1  */
-OP_EQ,/*        A B C   if ((RK(B) == RK(C)) != A) then pc++            */
-OP_LT,/*        A B C   if ((RK(B) <  RK(C)) != A) then pc++            */
-OP_LE,/*        A B C   if ((RK(B) <= RK(C)) != A) then pc++            */
-
-OP_TEST,/*      A C     if not (R(A) <=> C) then pc++                   */
-OP_TESTSET,/*   A B C   if (R(B) <=> C) then R(A) := R(B) else pc++     */
-
-OP_CALL,/*      A B C   R(A), ... ,R(A+C-2) := R(A)(R(A+1), ... ,R(A+B-1)) */
-OP_TAILCALL,/*  A B C   return R(A)(R(A+1), ... ,R(A+B-1))              */
-OP_RETURN,/*    A B     return R(A), ... ,R(A+B-2)      (see note)      */
-
-OP_FORLOOP,/*   A sBx   R(A)+=R(A+2);
-                        if R(A) <?= R(A+1) then { pc+=sBx; R(A+3)=R(A) }*/
-OP_FORPREP,/*   A sBx   R(A)-=R(A+2); pc+=sBx                           */
-
-OP_TFORCALL,/*  A C     R(A+3), ... ,R(A+2+C) := R(A)(R(A+1), R(A+2));  */
-OP_TFORLOOP,/*  A sBx   if R(A+1) != nil then { R(A)=R(A+1); pc += sBx }*/
-
-OP_SETLIST,/*   A B C   R(A)[(C-1)*FPF+i] := R(A+i), 1 <= i <= B        */
-
-OP_CLOSURE,/*   A Bx    R(A) := closure(KPROTO[Bx])                     */
-
-OP_VARARG,/*    A B     R(A), R(A+1), ..., R(A+B-2) = vararg            */
-
-OP_EXTRAARG,/*   Ax      extra (larger) argument for previous opcode     */
-
-OP_EVENT,/*  A B C   R(A) := R(B)[C]                             */
-
-OP_EVENTNAME, /* A	R(A) = event_name() */
-
-OP_EVENTARG,/* A B	R(A) := event_arg(B)*/
-
-OP_LOAD_GLOBAL,/*  A B C   R(A) := R(B)[C]                             */
-
-OP_EXIT,
-
-} OpCode;
-
-
-#define NUM_OPCODES     ((int)OP_LOAD_GLOBAL + 1)
-
-
-enum OpMode {iABC, iABx, iAsBx, iAx};  /* basic instruction format */
-
-
-/*
- * ** size and position of opcode arguments.
- * */
-#define SIZE_C          9
-#define SIZE_B          9
-#define SIZE_Bx         (SIZE_C + SIZE_B)
-#define SIZE_A          8
-#define SIZE_Ax         (SIZE_C + SIZE_B + SIZE_A)
-
-#define SIZE_OP         6
-
-#define POS_OP          0
-#define POS_A           (POS_OP + SIZE_OP)
-#define POS_C           (POS_A + SIZE_A)
-#define POS_B           (POS_C + SIZE_C)
-#define POS_Bx          POS_C
-#define POS_Ax          POS_A
-
-
-
-/*
- * ** limits for opcode arguments.
- * ** we use (signed) int to manipulate most arguments,
- * ** so they must fit in LUAI_BITSINT-1 bits (-1 for sign)
- * */
-#define MAXARG_Bx        ((1<<SIZE_Bx)-1)
-#define MAXARG_sBx        (MAXARG_Bx>>1)         /* `sBx' is signed */
-
-#define MAXARG_Ax       ((1<<SIZE_Ax)-1)
-
-#define MAXARG_A        ((1<<SIZE_A)-1)
-#define MAXARG_B        ((1<<SIZE_B)-1)
-#define MAXARG_C        ((1<<SIZE_C)-1)
-
-
-/* creates a mask with `n' 1 bits at position `p' */
-#define MASK1(n,p)      ((~((~(ktap_instruction)0)<<(n)))<<(p))
-
-/* creates a mask with `n' 0 bits at position `p' */
-#define MASK0(n,p)      (~MASK1(n,p))
-
-/*
- * ** the following macros help to manipulate instructions
- * */
-
-#define GET_OPCODE(i)   ((OpCode)((i)>>POS_OP) & MASK1(SIZE_OP,0))
-#define SET_OPCODE(i,o) ((i) = (((i)&MASK0(SIZE_OP,POS_OP)) | \
-                ((((ktap_instruction)o)<<POS_OP)&MASK1(SIZE_OP,POS_OP))))
-
-#define getarg(i,pos,size)      ((int)((i)>>pos) & MASK1(size,0))
-#define setarg(i,v,pos,size)    ((i) = (((i)&MASK0(size,pos)) | \
-                ((((ktap_instruction)v)<<pos)&MASK1(size,pos))))
-
-#define GETARG_A(i)     getarg(i, POS_A, SIZE_A)
-#define SETARG_A(i,v)   setarg(i, v, POS_A, SIZE_A)
-
-#define GETARG_A(i)     getarg(i, POS_A, SIZE_A)
-#define SETARG_A(i,v)   setarg(i, v, POS_A, SIZE_A)
-
-#define GETARG_B(i)     getarg(i, POS_B, SIZE_B)
-#define SETARG_B(i,v)   setarg(i, v, POS_B, SIZE_B)
-
-#define GETARG_C(i)     getarg(i, POS_C, SIZE_C)
-#define SETARG_C(i,v)   setarg(i, v, POS_C, SIZE_C)
-
-#define GETARG_Bx(i)    getarg(i, POS_Bx, SIZE_Bx)
-#define SETARG_Bx(i,v)  setarg(i, v, POS_Bx, SIZE_Bx)
-
-#define GETARG_Ax(i)    getarg(i, POS_Ax, SIZE_Ax)
-#define SETARG_Ax(i,v)  setarg(i, v, POS_Ax, SIZE_Ax)
-
-#define GETARG_sBx(i)   (GETARG_Bx(i)-MAXARG_sBx)
-#define SETARG_sBx(i,b) SETARG_Bx((i), (unsigned int)(b)+MAXARG_sBx)
-
-#define CREATE_ABC(o,a,b,c)     (((ktap_instruction)(o))<<POS_OP) \
-                        | (((ktap_instruction)(a))<<POS_A) \
-                        | (((ktap_instruction)(b))<<POS_B) \
-                        | (((ktap_instruction)(c))<<POS_C)
-
-#define CREATE_ABx(o,a,bc)      (((ktap_instruction)(o))<<POS_OP) \
-                        | (((ktap_instruction)(a))<<POS_A) \
-                        | (((ktap_instruction)(bc))<<POS_Bx)
-
-#define CREATE_Ax(o,a)          (((ktap_instruction)(o))<<POS_OP) \
-                        | (((ktap_instruction)(a))<<POS_Ax)
-
-
-
-/*
- * ** Macros to operate RK indices
- * */
-
-/* this bit 1 means constant (0 means register) */
-#define BITRK           (1 << (SIZE_B - 1))
-
-/* test whether value is a constant */
-#define ISK(x)          ((x) & BITRK)
-
-/* gets the index of the constant */
-#define INDEXK(r)       ((int)(r) & ~BITRK)
-
-#define MAXINDEXRK      (BITRK - 1)
-
-/* code a constant index as a RK value */
-#define RKASK(x)        ((x) | BITRK)
-
-
-/*
- * ** invalid register that fits in 8 bits
- * */
-#define NO_REG          MAXARG_A
-
-
-/*
- * ** R(x) - register
- * ** Kst(x) - constant (in constant table)
- * ** RK(x) == if ISK(x) then Kst(INDEXK(x)) else R(x)
- * */
-
-
-
-/*
- * ** masks for instruction properties. The format is:
- * ** bits 0-1: op mode
- * ** bits 2-3: C arg mode
- * ** bits 4-5: B arg mode
- * ** bit 6: instruction set register A
- * ** bit 7: operator is a test (next instruction must be a jump)
- * */
-
-enum OpArgMask {
-  OpArgN,  /* argument is not used */
-  OpArgU,  /* argument is used */
-  OpArgR,  /* argument is a register or a jump offset */
-  OpArgK   /* argument is a constant or register/constant */
-};
-
-extern const u8 ktap_opmodes[NUM_OPCODES];
-
-#define getOpMode(m)    ((enum OpMode)ktap_opmodes[m] & 3)
-#define getBMode(m)     ((enum OpArgMask)(ktap_opmodes[m] >> 4) & 3)
-#define getCMode(m)     ((enum OpArgMask)(ktap_opmodes[m] >> 2) & 3)
-#define testAMode(m)    (ktap_opmodes[m] & (1 << 6))
-#define testTMode(m)    (ktap_opmodes[m] & (1 << 7))
-
-
-/* number of list items to accumulate before a SETLIST instruction */
-#define LFIELDS_PER_FLUSH       50
-
-extern const char *const ktap_opnames[NUM_OPCODES + 1];
-
-#endif /* __KTAP_BYTECODE_H__ */
diff --git a/drivers/staging/ktap/include/ktap_types.h b/drivers/staging/ktap/include/ktap_types.h
deleted file mode 100644
index cf1cef4..0000000
--- a/drivers/staging/ktap/include/ktap_types.h
+++ /dev/null
@@ -1,674 +0,0 @@
-#ifndef __KTAP_TYPES_H__
-#define __KTAP_TYPES_H__
-
-/* opcode is copied from lua initially */
-
-#ifdef __KERNEL__
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/semaphore.h>
-#include <linux/wait.h>
-#else
-typedef char u8;
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#endif
-
-typedef struct ktap_parm {
-	char *trunk; /* __user */
-	int trunk_len;
-	int argc;
-	char **argv; /* __user */
-	int verbose;
-	int trace_pid;
-	int workload;
-	int trace_cpu;
-	int print_timestamp;
-} ktap_parm;
-
-/*
- * Ioctls that can be done on a ktap fd:
- * todo: use _IO macro in include/uapi/asm-generic/ioctl.h
- */
-#define KTAP_CMD_IOC_VERSION		('$' + 0)
-#define KTAP_CMD_IOC_RUN		('$' + 1)
-#define KTAP_CMD_IOC_EXIT		('$' + 3)
-
-#define KTAP_ENV	"_ENV"
-
-#define KTAP_VERSION_MAJOR       "0"
-#define KTAP_VERSION_MINOR       "2"
-
-#define KTAP_VERSION    "ktap " KTAP_VERSION_MAJOR "." KTAP_VERSION_MINOR
-#define KTAP_AUTHOR    "Jovi Zhangwei <jovi.zhangwei@gmail.com>"
-#define KTAP_COPYRIGHT  KTAP_VERSION "  Copyright (C) 2012-2013, " KTAP_AUTHOR
-
-#define MYINT(s)        (s[0] - '0')
-#define VERSION         (MYINT(KTAP_VERSION_MAJOR) * 16 + MYINT(KTAP_VERSION_MINOR))
-#define FORMAT          0 /* this is the official format */
-
-#define KTAP_SIGNATURE  "\033ktap"
-
-/* data to catch conversion errors */
-#define KTAPC_TAIL      "\x19\x93\r\n\x1a\n"
-
-/* size in bytes of header of binary files */
-#define KTAPC_HEADERSIZE	(sizeof(KTAP_SIGNATURE) - sizeof(char) + 2 + \
-				 6 + sizeof(KTAPC_TAIL) - sizeof(char))
-
-typedef int ktap_instruction;
-
-typedef union ktap_gcobject ktap_gcobject;
-
-#define CommonHeader ktap_gcobject *next; u8 tt;
-
-struct ktap_state;
-typedef int (*ktap_cfunction) (struct ktap_state *ks);
-
-typedef union ktap_string {
-	int dummy;  /* ensures maximum alignment for strings */
-	struct {
-		CommonHeader;
-		u8 extra;  /* reserved words for short strings; "has hash" for longs */
-		unsigned int hash;
-		size_t len;  /* number of characters in string */
-	} tsv;
-} ktap_string;
-
-#define getstr(ts)	(const char *)((ts) + 1)
-#define eqshrstr(a,b)	((a) == (b))
-
-#define svalue(o)       getstr(rawtsvalue(o))
-
-
-union _ktap_value {
-	ktap_gcobject *gc;    /* collectable objects */
-	void *p;         /* light userdata */
-	int b;           /* booleans */
-	ktap_cfunction f; /* light C functions */
-	long n;         /* numbers */
-};
-
-
-typedef struct ktap_value {
-	union _ktap_value val;
-	int type;
-} ktap_value;
-
-typedef ktap_value * StkId;
-
-
-
-typedef union ktap_udata {
-	struct {
-		CommonHeader;
-		size_t len;  /* number of bytes */
-	} uv;
-} ktap_udata;
-
-/*
- * Description of an upvalue for function prototypes
- */
-typedef struct ktap_upvaldesc {
-	ktap_string *name;  /* upvalue name (for debug information) */
-	u8 instack;  /* whether it is in stack */
-	u8 idx;  /* index of upvalue (in stack or in outer function's list) */
-} ktap_upvaldesc;
-
-/*
- * Description of a local variable for function prototypes
- * (used for debug information)
- */
-typedef struct ktap_locvar {
-	ktap_string *varname;
-	int startpc;  /* first point where variable is active */
-	int endpc;    /* first point where variable is dead */
-} ktap_locvar;
-
-
-typedef struct ktap_upval {
-	CommonHeader;
-	ktap_value *v;  /* points to stack or to its own value */
-	union {
-		ktap_value value;  /* the value (when closed) */
-		struct {  /* double linked list (when open) */
-			struct ktap_upval *prev;
-			struct ktap_upval *next;
-		} l;
-	} u;
-} ktap_upval;
-
-
-#define KTAP_STACK_MAX_ENTRIES 10
-
-typedef struct ktap_btrace {
-	CommonHeader;
-	unsigned int nr_entries;
-	unsigned long entries[KTAP_STACK_MAX_ENTRIES];
-} ktap_btrace;
-
-#define ktap_closure_header \
-	CommonHeader; u8 nupvalues; ktap_gcobject *gclist
-
-typedef struct ktap_cclosure {
-	ktap_closure_header;
-	ktap_cfunction f;
-	ktap_value upvalue[1];  /* list of upvalues */
-} ktap_cclosure;
-
-
-typedef struct ktap_lclosure {
-	ktap_closure_header;
-	struct ktap_proto *p;
-	struct ktap_upval *upvals[1];  /* list of upvalues */
-} ktap_lclosure;
-
-
-typedef struct ktap_closure {
-	struct ktap_cclosure c;
-	struct ktap_lclosure l;
-} ktap_closure;
-
-
-typedef struct ktap_proto {
-	CommonHeader;
-	ktap_value *k;  /* constants used by the function */
-	ktap_instruction *code;
-	struct ktap_proto **p;  /* functions defined inside the function */
-	int *lineinfo;  /* map from opcodes to source lines (debug information) */
-	struct ktap_locvar *locvars;  /* information about local variables (debug information) */
-	struct ktap_upvaldesc *upvalues;  /* upvalue information */
-	ktap_closure *cache;  /* last created closure with this prototype */
-	ktap_string  *source;  /* used for debug information */
-	int sizeupvalues;  /* size of 'upvalues' */
-	int sizek;  /* size of `k' */
-	int sizecode;
-	int sizelineinfo;
-	int sizep;  /* size of `p' */
-	int sizelocvars;
-	int linedefined;
-	int lastlinedefined;
-	u8 numparams;  /* number of fixed parameters */
-	u8 is_vararg;
-	u8 maxstacksize;  /* maximum stack used by this function */
-} ktap_proto;
-
-
-/*
- * information about a call
- */
-typedef struct ktap_callinfo {
-	StkId func;  /* function index in the stack */
-	StkId top;  /* top for this function */
-	struct ktap_callinfo *prev, *next;  /* dynamic call link */
-	short nresults;  /* expected number of results from this function */
-	u8 callstatus;
-	int extra;
-	union {
-		struct {  /* only for Lua functions */
-			StkId base;  /* base for this function */
-			const unsigned int *savedpc;
-		} l;
-		struct {  /* only for C functions */
-			int ctx;  /* context info. in case of yields */
-			u8 status;
-		} c;
-	} u;
-} ktap_callinfo;
-
-
-/*
- * ktap_tables
- */
-typedef union ktap_tkey {
-	struct {
-		union _ktap_value value_;
-		int tt_;
-		struct ktap_tnode *next;  /* for chaining */
-	} nk;
-	ktap_value tvk;
-} ktap_tkey;
-
-
-typedef struct ktap_tnode {
-	ktap_value i_val;
-	ktap_tkey i_key;
-} ktap_tnode;
-
-
-typedef struct ktap_table {
-	CommonHeader;
-#ifdef __KERNEL__
-	arch_spinlock_t lock;
-#endif
-	u8 flags;  /* 1<<p means tagmethod(p) is not present */
-	u8 lsizenode;  /* log2 of size of `node' array */
-	int sizearray;  /* size of `array' array */
-	ktap_value *array;  /* array part */
-	ktap_tnode *node;
-	ktap_tnode *lastfree;  /* any free position is before this position */
-	ktap_gcobject *gclist;
-} ktap_table;
-
-#define lmod(s,size)	((int)((s) & ((size)-1)))
-
-enum AGGREGATION_TYPE {
-	AGGREGATION_TYPE_COUNT,
-	AGGREGATION_TYPE_MAX,
-	AGGREGATION_TYPE_MIN,
-	AGGREGATION_TYPE_SUM,
-	AGGREGATION_TYPE_AVG
-};
-
-typedef struct ktap_aggrtable {
-	CommonHeader;
-	ktap_table **pcpu_tbl;
-	ktap_gcobject *gclist;
-} ktap_aggrtable;
-
-typedef struct ktap_aggraccval {
-	CommonHeader;
-	int type;
-	int val;
-	int more;
-} ktap_aggraccval;
-
-typedef struct ktap_stringtable {
-	ktap_gcobject **hash;
-	int nuse;
-	int size;
-} ktap_stringtable;
-
-typedef struct ktap_global_state {
-	ktap_stringtable strt;  /* hash table for strings */
-	ktap_value registry;
-	unsigned int seed; /* randonized seed for hashes */
-	u8 gcstate; /* state of garbage collector */
-	u8 gckind; /* kind of GC running */
-	u8 gcrunning; /* true if GC is running */
-
-	ktap_gcobject *allgc; /* list of all collectable objects */
-
-	ktap_upval uvhead; /* head of double-linked list of all open upvalues */
-
-	struct ktap_state *mainthread;
-#ifdef __KERNEL__
-	ktap_parm *parm;
-	pid_t trace_pid;
-	struct task_struct *trace_task;
-	cpumask_var_t cpumask;
-	struct ring_buffer *buffer;
-	struct dentry *trace_pipe_dentry;
-	int nr_builtin_cfunction;
-	ktap_value *cfunction_tbl;
-	struct task_struct *task;
-	int trace_enabled;
-	struct list_head timers;
-	struct list_head probe_events_head;
-	int exit;
-	int wait_user;
-	ktap_closure *trace_end_closure;
-#endif
-	int error;
-} ktap_global_state;
-
-typedef struct ktap_state {
-	CommonHeader;
-	u8 status;
-	ktap_global_state *g;
-	int stop;
-	StkId top;
-	ktap_callinfo *ci;
-	const unsigned long *oldpc;
-	StkId stack_last;
-	StkId stack;
-	int stacksize;
-	ktap_gcobject *openupval;
-	ktap_callinfo baseci;
-
-	int debug;
-	int version;
-	int gcrunning;
-
-	/* list of temp collectable objects, free when thread exit */
-	ktap_gcobject *gclist;
-
-#ifdef __KERNEL__
-	struct ktap_event *current_event;
-	int aggr_accval; /* for temp value storage */
-#endif
-} ktap_state;
-
-
-typedef struct gcheader {
-	CommonHeader;
-} gcheader;
-
-/*
- * Union of all collectable objects
- */
-union ktap_gcobject {
-	gcheader gch;  /* common header */
-	union ktap_string ts;
-	union ktap_udata u;
-	struct ktap_closure cl;
-	struct ktap_table h;
-	struct ktap_aggrtable ah;
-	struct ktap_aggraccval acc;
-	struct ktap_proto p;
-	struct ktap_upval uv;
-	struct ktap_state th;  /* thread */
- 	struct ktap_btrace bt;  /* thread */
-};
-
-#define gch(o)	(&(o)->gch)
-/* macros to convert a GCObject into a specific value */
-#define rawgco2ts(o)	(&((o)->ts))
-#define gco2ts(o)       (&rawgco2ts(o)->tsv)
-
-#define gco2uv(o)	(&((o)->uv))
-
-#define obj2gco(v)	((ktap_gcobject *)(v))
-
-
-#ifdef __KERNEL__
-#define ktap_assert(s)
-#else
-#define ktap_assert(s)
-#if 0
-#define ktap_assert(s)	\
-	do {	\
-		if (!s) {	\
-			printf("assert failed %s, %d\n", __func__, __LINE__);\
-			exit(0);	\
-		}	\
-	} while(0)
-#endif
-#endif
-
-#define check_exp(c,e)                (e)
-
-
-typedef int ktap_number;
-
-
-#define ktap_number2int(i,n)   ((i)=(int)(n))
-
-
-/* predefined values in the registry */
-#define KTAP_RIDX_MAINTHREAD     1
-#define KTAP_RIDX_GLOBALS        2
-#define KTAP_RIDX_LAST           KTAP_RIDX_GLOBALS
-
-
-#define KTAP_TNONE		(-1)
-
-#define KTAP_TNIL		0
-#define KTAP_TBOOLEAN		1
-#define KTAP_TLIGHTUSERDATA	2
-#define KTAP_TNUMBER		3
-#define KTAP_TSTRING		4
-#define KTAP_TSHRSTR		(KTAP_TSTRING | (0 << 4))  /* short strings */
-#define KTAP_TLNGSTR		(KTAP_TSTRING | (1 << 4))  /* long strings */
-#define KTAP_TTABLE		5
-#define KTAP_TFUNCTION		6
-#define KTAP_TLCL		(KTAP_TFUNCTION | (0 << 4))  /* closure */
-#define KTAP_TLCF		(KTAP_TFUNCTION | (1 << 4))  /* light C function */
-#define KTAP_TCCL		(KTAP_TFUNCTION | (2 << 4))  /* C closure */
-#define KTAP_TUSERDATA		7
-#define KTAP_TTHREAD		8
-
-#define KTAP_NUMTAGS		9
-
-#define KTAP_TPROTO		11
-#define KTAP_TUPVAL		12
-
-#define KTAP_TEVENT		13
-
-#define KTAP_TBTRACE		14
-
-#define KTAP_TAGGRTABLE		15
-#define KTAP_TAGGRACCVAL	16
-#define KTAP_TAGGRVAL		17
-
-#define ttype(o)	((o->type) & 0x3F)
-#define settype(obj, t)	((obj)->type = (t))
-
-
-
-/* raw type tag of a TValue */
-#define rttype(o)       ((o)->type)
-
-/* tag with no variants (bits 0-3) */
-#define novariant(x)    ((x) & 0x0F)
-
-/* type tag of a TValue with no variants (bits 0-3) */
-#define ttypenv(o)      (novariant(rttype(o)))
-
-#define val_(o)		((o)->val)
-
-#define bvalue(o)	(val_(o).b)
-#define nvalue(o)	(val_(o).n)
-#define hvalue(o)	(&val_(o).gc->h)
-#define ahvalue(o)	(&val_(o).gc->ah)
-#define aggraccvalue(o)	(&val_(o).gc->acc)
-#define CLVALUE(o)	(&val_(o).gc->cl.l)
-#define clcvalue(o)	(&val_(o).gc->cl.c)
-#define clvalue(o)	(&val_(o).gc->cl)
-#define rawtsvalue(o)	(&val_(o).gc->ts)
-#define pvalue(o)	(&val_(o).p)
-#define fvalue(o)	(val_(o).f)
-#define rawuvalue(o)	(&val_(o).gc->u)
-#define uvalue(o)	(&rawuvalue(o)->uv)
-#define evalue(o)	(val_(o).p)
-#define btvalue(o)	(&val_(o).gc->bt)
-
-#define gcvalue(o)	(val_(o).gc)
-
-#define isnil(o)	(o->type == KTAP_TNIL)
-#define isboolean(o)	(o->type == KTAP_TBOOLEAN)
-#define isfalse(o)	(isnil(o) || (isboolean(o) && bvalue(o) == 0))
-
-#define ttisshrstring(o)	((o)->type == KTAP_TSHRSTR)
-#define ttisstring(o)		(((o)->type & 0x0F) == KTAP_TSTRING)
-#define ttisnumber(o)		((o)->type == KTAP_TNUMBER)
-#define ttisfunc(o)		((o)->type == KTAP_TFUNCTION)
-#define ttistable(o)		((o)->type == KTAP_TTABLE)
-#define ttisaggrtable(o)	((o)->type == KTAP_TAGGRTABLE)
-#define ttisaggrval(o)		((o)->type == KTAP_TAGGRVAL)
-#define ttisaggracc(o)		((o)->type == KTAP_TAGGRACCVAL)
-#define ttisnil(o)		((o)->type == KTAP_TNIL)
-#define ttisboolean(o)		((o)->type == KTAP_TBOOLEAN)
-#define ttisequal(o1,o2)        ((o1)->type == (o2)->type)
-#define ttisevent(o)		((o)->type == KTAP_TEVENT)
-#define ttisbtrace(o)		((o)->type == KTAP_TBTRACE)
-
-#define ttisclone(o)		ttisbtrace(o)
-
-
-#define setnilvalue(obj) \
-	{ ktap_value *io = (obj); io->val.n = 0; settype(io, KTAP_TNIL); }
-
-#define setbvalue(obj, x) \
-	{ ktap_value *io = (obj); io->val.b = (x); settype(io, KTAP_TBOOLEAN); }
-
-#define setnvalue(obj, x) \
-	{ ktap_value *io = (obj); io->val.n = (x); settype(io, KTAP_TNUMBER); }
-
-#define setaggrvalue(obj, x) \
-	{ ktap_value *io = (obj); io->val.n = (x); settype(io, KTAP_TAGGRVAL); }
-
-#define setaggraccvalue(obj,x) \
-	{ ktap_value *io=(obj); \
-	  val_(io).gc = (ktap_gcobject *)(x); settype(io, KTAP_TAGGRACCVAL); }
-
-#define setsvalue(obj, x) \
-	{ ktap_value *io = (obj); \
-	  ktap_string *x_ = (x); \
-	  io->val.gc = (ktap_gcobject *)x_; settype(io, x_->tsv.tt); }
-
-#define setcllvalue(obj, x) \
-	{ ktap_value *io = (obj); \
-	  io->val.gc = (ktap_gcobject *)x; settype(io, KTAP_TLCL); }
-
-#define sethvalue(obj,x) \
-	{ ktap_value *io=(obj); \
-	  val_(io).gc = (ktap_gcobject *)(x); settype(io, KTAP_TTABLE); }
-
-#define setahvalue(obj,x) \
-	{ ktap_value *io=(obj); \
-	  val_(io).gc = (ktap_gcobject *)(x); settype(io, KTAP_TAGGRTABLE); }
-
-#define setfvalue(obj,x) \
-	{ ktap_value *io=(obj); val_(io).f=(x); settype(io, KTAP_TLCF); }
-
-#define setthvalue(L,obj,x) \
-	{ ktap_value *io=(obj); \
-	  val_(io).gc = (ktap_gcobject *)(x); settype(io, KTAP_TTHREAD); }
-
-#define setevalue(obj, x) \
-	{ ktap_value *io=(obj); val_(io).p = (x); settype(io, KTAP_TEVENT); }
-
-#define setbtvalue(obj,x) \
-	{ ktap_value *io=(obj); \
-	  val_(io).gc = (ktap_gcobject *)(x); settype(io, KTAP_TBTRACE); }
-
-#define setobj(obj1,obj2) \
-        { const ktap_value *io2=(obj2); ktap_value *io1=(obj1); \
-          io1->val = io2->val; io1->type = io2->type; }
-
-#define rawequalobj(t1, t2) \
-	(ttisequal(t1, t2) && kp_equalobjv(NULL, t1, t2))
-
-#define equalobj(ks, t1, t2) rawequalobj(t1, t2)
-
-#define incr_top(ks) {ks->top++;}
-
-#define NUMADD(a, b)    ((a) + (b))
-#define NUMSUB(a, b)    ((a) - (b))
-#define NUMMUL(a, b)    ((a) * (b))
-#define NUMDIV(a, b)    ((a) / (b))
-#define NUMUNM(a)       (-(a))
-#define NUMEQ(a, b)     ((a) == (b))
-#define NUMLT(a, b)     ((a) < (b))
-#define NUMLE(a, b)     ((a) <= (b))
-#define NUMISNAN(a)     (!NUMEQ((a), (a)))
-
-/* todo: floor and pow in kernel */
-#define NUMMOD(a, b)    ((a) % (b))
-#define NUMPOW(a, b)    (pow(a, b))
-
-
-ktap_string *kp_tstring_newlstr(ktap_state *ks, const char *str, size_t l);
-ktap_string *kp_tstring_newlstr_local(ktap_state *ks, const char *str, size_t l);
-ktap_string *kp_tstring_new(ktap_state *ks, const char *str);
-ktap_string *kp_tstring_new_local(ktap_state *ks, const char *str);
-int kp_tstring_eqstr(ktap_string *a, ktap_string *b);
-unsigned int kp_string_hash(const char *str, size_t l, unsigned int seed);
-int kp_tstring_eqlngstr(ktap_string *a, ktap_string *b);
-int kp_tstring_cmp(const ktap_string *ls, const ktap_string *rs);
-void kp_tstring_resize(ktap_state *ks, int newsize);
-void kp_tstring_freeall(ktap_state *ks);
-
-ktap_value *kp_table_set(ktap_state *ks, ktap_table *t, const ktap_value *key);
-ktap_table *kp_table_new(ktap_state *ks);
-const ktap_value *kp_table_getint(ktap_table *t, int key);
-void kp_table_setint(ktap_state *ks, ktap_table *t, int key, ktap_value *v);
-const ktap_value *kp_table_get(ktap_table *t, const ktap_value *key);
-void kp_table_setvalue(ktap_state *ks, ktap_table *t, const ktap_value *key, ktap_value *val);
-void kp_table_resize(ktap_state *ks, ktap_table *t, int nasize, int nhsize);
-void kp_table_resizearray(ktap_state *ks, ktap_table *t, int nasize);
-void kp_table_free(ktap_state *ks, ktap_table *t);
-int kp_table_length(ktap_state *ks, ktap_table *t);
-void kp_table_dump(ktap_state *ks, ktap_table *t);
-void kp_table_clear(ktap_state *ks, ktap_table *t);
-void kp_table_histogram(ktap_state *ks, ktap_table *t);
-int kp_table_next(ktap_state *ks, ktap_table *t, StkId key);
-void kp_table_atomic_inc(ktap_state *ks, ktap_table *t, ktap_value *key, int n);
-void kp_aggraccval_dump(ktap_state *ks, ktap_aggraccval *acc);
-ktap_aggrtable *kp_aggrtable_new(ktap_state *ks);
-ktap_table *kp_aggrtable_synthesis(ktap_state *ks, ktap_aggrtable *ah);
-void kp_aggrtable_dump(ktap_state *ks, ktap_aggrtable *ah);
-void kp_aggrtable_free(ktap_state *ks, ktap_aggrtable *ah);
-void kp_aggrtable_set(ktap_state *ks, ktap_aggrtable *ah,
-			ktap_value *key, ktap_value *val);
-void kp_aggrtable_get(ktap_state *ks, ktap_aggrtable *ah,
-			ktap_value *key, ktap_value *val);
-void kp_aggrtable_histogram(ktap_state *ks, ktap_aggrtable *ah);
-void kp_obj_dump(ktap_state *ks, const ktap_value *v);
-void kp_showobj(ktap_state *ks, const ktap_value *v);
-int kp_objlen(ktap_state *ks, const ktap_value *rb);
-void kp_objclone(ktap_state *ks, const ktap_value *o, ktap_value *newo,
-		 ktap_gcobject **list);
-ktap_gcobject *kp_newobject(ktap_state *ks, int type, size_t size, ktap_gcobject **list);
-int kp_equalobjv(ktap_state *ks, const ktap_value *t1, const ktap_value *t2);
-ktap_closure *kp_newlclosure(ktap_state *ks, int n);
-ktap_proto *kp_newproto(ktap_state *ks);
-ktap_upval *kp_newupval(ktap_state *ks);
-void kp_free_gclist(ktap_state *ks, ktap_gcobject *o);
-void kp_free_all_gcobject(ktap_state *ks);
-void kp_header(u8 *h);
-
-int kp_str2d(const char *s, size_t len, ktap_number *result);
-
-#define kp_realloc(ks, v, osize, nsize, t) \
-	((v) = (t *)kp_reallocv(ks, v, osize * sizeof(t), nsize * sizeof(t)))
-
-#define kp_error(ks, args...) \
-	do { \
-		kp_printf(ks, "error: "args);	\
-		G(ks)->error = 1; \
-		kp_exit(ks);	\
-	} while(0)
-
-#ifdef __KERNEL__
-#define G(ks)   (ks->g)
-
-void *kp_malloc(ktap_state *ks, int size);
-void kp_free(ktap_state *ks, void *addr);
-void *kp_reallocv(ktap_state *ks, void *addr, int oldsize, int newsize);
-void *kp_zalloc(ktap_state *ks, int size);
-
-void kp_printf(ktap_state *ks, const char *fmt, ...);
-extern void __kp_puts(ktap_state *ks, const char *str);
-extern void __kp_bputs(ktap_state *ks, const char *str);
-
-#define kp_puts(ks, str) ({						\
-	static const char *trace_printk_fmt				\
-		__attribute__((section("__trace_printk_fmt"))) =	\
-		__builtin_constant_p(str) ? str : NULL;			\
-									\
-	if (__builtin_constant_p(str))					\
-		__kp_bputs(ks, trace_printk_fmt);		\
-	else								\
-		__kp_puts(ks, str);		\
-})
-
-#else
-/*
- * this is used for ktapc tstring operation, tstring need G(ks)->strt
- * and G(ks)->seed, so ktapc need to init those field
- */
-#define G(ks)   (&dummy_global_state)
-extern ktap_global_state dummy_global_state;
-
-#define kp_malloc(ks, size)			malloc(size)
-#define kp_free(ks, block)			free(block)
-#define kp_reallocv(ks, block, osize, nsize)	realloc(block, nsize)
-#define kp_printf(ks, args...)			printf(args)
-#define kp_puts(ks, str)			printf("%s", str)
-#define kp_exit(ks)				exit(EXIT_FAILURE)
-#endif
-
-#define __maybe_unused	__attribute__((unused))
-
-/*
- * KTAP_QL describes how error messages quote program elements.
- * CHANGE it if you want a different appearance.
- */
-#define KTAP_QL(x)      "'" x "'"
-#define KTAP_QS         KTAP_QL("%s")
-
-#endif /* __KTAP_TYPES_H__ */
-
diff --git a/drivers/staging/ktap/interpreter/ktap.c b/drivers/staging/ktap/interpreter/ktap.c
deleted file mode 100644
index 18d8fc8..0000000
--- a/drivers/staging/ktap/interpreter/ktap.c
+++ /dev/null
@@ -1,235 +0,0 @@
-/*
- * ktap.c - ktapvm kernel module main entry
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-/*
- * this file is the first file to be compile, add CONFIG_ checking in here.
- * See Requirements in doc/introduction.txt
- */
-
-#include <linux/version.h>
-#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 1, 0)
-#error "Currently ktap don't support kernel older than 3.1"
-#endif
-
-#if !CONFIG_EVENT_TRACING
-#error "Please enable CONFIG_EVENT_TRACING before compile ktap"
-#endif
-
-#if !CONFIG_PERF_EVENTS
-#error "Please enable CONFIG_PERF_EVENTS before compile ktap"
-#endif
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/file.h>
-#include <linux/fcntl.h>
-#include <linux/sched.h>
-#include <linux/poll.h>
-#include <linux/anon_inodes.h>
-#include <linux/debugfs.h>
-#include <linux/vmalloc.h>
-#include "../include/ktap.h"
-
-static int load_trunk(struct ktap_parm *parm, unsigned long **buff)
-{
-	int ret;
-	unsigned long *vmstart;
-
-	vmstart = vmalloc(parm->trunk_len);
-	if (!vmstart)
-		return -ENOMEM;
-
-	ret = copy_from_user(vmstart, (void __user *)parm->trunk,
-			     parm->trunk_len);
-	if (ret < 0) {
-		vfree(vmstart);
-		return -EFAULT;
-	}
-
-	*buff = vmstart;
-	return 0;
-}
-
-int gettimeofday_us(void)
-{
-	struct timeval tv;
-
-	do_gettimeofday(&tv);
-	return tv.tv_sec * USEC_PER_SEC + tv.tv_usec;
-}
-
-struct dentry *kp_dir_dentry;
-static atomic_t kp_is_running = ATOMIC_INIT(0);
-
-/* Ktap Main Entry */
-static int ktap_main(struct file *file, ktap_parm *parm)
-{
-	unsigned long *buff = NULL;
-	ktap_state *ks;
-	ktap_closure *cl;
-	int start_time, delta_time;
-	int ret;
-
-	if (atomic_inc_return(&kp_is_running) != 1) {
-		atomic_dec(&kp_is_running);
-		pr_info("only one ktap thread allow to run\n");
-		return -EBUSY;
-	}
-
-	start_time = gettimeofday_us();
-
-	ks = kp_newstate(parm, kp_dir_dentry);
-	if (unlikely(!ks)) {
-		ret = -ENOEXEC;
-		goto out;
-	}
-
-	file->private_data = ks;
-
-	ret = load_trunk(parm, &buff);
-	if (ret) {
-		pr_err("cannot load file\n");
-		goto out;
-	}
-
-	cl = kp_load(ks, (unsigned char *)buff);
-
-	vfree(buff);
-
-	if (cl) {
-		/* optimize bytecode before excuting */
-		kp_optimize_code(ks, 0, cl->l.p);
-
-		delta_time = gettimeofday_us() - start_time;
-		kp_verbose_printf(ks, "booting time: %d (us)\n", delta_time);
-		kp_call(ks, ks->top - 1, 0);
-	}
-
-	kp_final_exit(ks);
-
- out:
-	atomic_dec(&kp_is_running);	
-	return ret;
-}
-
-
-static void print_version(void)
-{
-}
-
-static long ktap_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
-	ktap_parm parm;
-	int ret;
-
-	switch (cmd) {
-	case KTAP_CMD_IOC_VERSION:
-		print_version();
-		return 0;
-	case KTAP_CMD_IOC_RUN:
-		ret = copy_from_user(&parm, (void __user *)arg,
-				     sizeof(ktap_parm));
-		if (ret < 0)
-			return -EFAULT;
-
-		return ktap_main(file, &parm);
-	default:
-		return -EINVAL;
-	};
-
-        return 0;
-}
-
-static const struct file_operations ktap_fops = {
-	.llseek                 = no_llseek,
-	.unlocked_ioctl         = ktap_ioctl,
-};
-
-static long ktapvm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
-	int new_fd, err;
-	struct file *new_file;
-
-	new_fd = get_unused_fd();
-	if (new_fd < 0)
-		return new_fd;
-
-	new_file = anon_inode_getfile("[ktap]", &ktap_fops, NULL, O_RDWR);
-	if (IS_ERR(new_file)) {
-		err = PTR_ERR(new_file);
-		put_unused_fd(new_fd);
-		return err;
-	}
-
-	file->private_data = NULL;
-	fd_install(new_fd, new_file);
-	return new_fd;
-}
-
-static const struct file_operations ktapvm_fops = {
-	.owner  = THIS_MODULE,
-	.unlocked_ioctl         = ktapvm_ioctl,
-};
-
-unsigned int kp_stub_exit_instr;
-
-static int __init init_ktap(void)
-{
-	struct dentry *ktapvm_dentry;
-
-	kp_dir_dentry = debugfs_create_dir("ktap", NULL);
-	if (!kp_dir_dentry) {
-		pr_err("ktap: debugfs_create_dir failed\n");
-		return -1;
-	}
-
-	ktapvm_dentry = debugfs_create_file("ktapvm", 0444, kp_dir_dentry, NULL,
-					    &ktapvm_fops);
-
-	if (!ktapvm_dentry) {
-		pr_err("ktapvm: cannot create ktapvm file\n");
-		debugfs_remove_recursive(kp_dir_dentry);
-		return -1;
-	}
-
-	SET_OPCODE(kp_stub_exit_instr, OP_EXIT);
-
-	return 0;
-}
-
-static void __exit exit_ktap(void)
-{
-	debugfs_remove_recursive(kp_dir_dentry);
-}
-
-module_init(init_ktap);
-module_exit(exit_ktap);
-
-MODULE_AUTHOR("Jovi Zhangwei <jovi.zhangwei@gmail.com>");
-MODULE_DESCRIPTION("ktap");
-MODULE_LICENSE("GPL");
-
-int kp_max_exec_count = 10000;
-module_param_named(max_exec_count, kp_max_exec_count, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(max_exec_count, "non-mainthread max instruction execution count");
-
diff --git a/drivers/staging/ktap/interpreter/library/ansilib.c b/drivers/staging/ktap/interpreter/library/ansilib.c
deleted file mode 100644
index d058373..0000000
--- a/drivers/staging/ktap/interpreter/library/ansilib.c
+++ /dev/null
@@ -1,153 +0,0 @@
-/*
- * ansilib.c - ANSI escape sequences library
- *
- * http://en.wikipedia.org/wiki/ANSI_escape_code
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "../../include/ktap.h"
-
-/**
- * function ansi.clear_screen - Move cursor to top left and clear screen.
- *
- * Description: Sends ansi code for moving cursor to top left and then the
- * ansi code for clearing the screen from the cursor position to the end.
- */
-
-static int ktap_lib_clear_screen(ktap_state *ks)
-{
-	kp_printf(ks, "\033[1;1H\033[J");
-	return 0;
-}
-
-/**
- * function ansi.set_color - Set the ansi Select Graphic Rendition mode.
- * @fg: Foreground color to set.
- *
- * Description: Sends ansi code for Select Graphic Rendition mode for the
- * given forground color. Black (30), Blue (34), Green (32), Cyan (36),
- * Red (31), Purple (35), Brown (33), Light Gray (37).
- */
-
-static int ktap_lib_set_color(ktap_state *ks)
-{
-	int fg;
-
-	kp_arg_check(ks, 1, KTAP_TNUMBER);
-
-	fg = nvalue(kp_arg(ks, 1));
-	kp_printf(ks, "\033[%dm", fg);
-	return 0;
-}
-
-/**
- * function ansi.set_color2 - Set the ansi Select Graphic Rendition mode.
- * @fg: Foreground color to set.
- * @bg: Background color to set.
- *
- * Description: Sends ansi code for Select Graphic Rendition mode for the
- * given forground color, Black (30), Blue (34), Green (32), Cyan (36),
- * Red (31), Purple (35), Brown (33), Light Gray (37) and the given
- * background color, Black (40), Red (41), Green (42), Yellow (43),
- * Blue (44), Magenta (45), Cyan (46), White (47).
- */
-static int ktap_lib_set_color2(ktap_state *ks)
-{
-	int fg, bg;
-	
-	kp_arg_check(ks, 1, KTAP_TNUMBER);
-	kp_arg_check(ks, 2, KTAP_TNUMBER);
-
-	fg = nvalue(kp_arg(ks, 1));
-	bg = nvalue(kp_arg(ks, 2));
-	kp_printf(ks, "\033[%d;%dm", fg, bg);
-	return 0;
-}
-
-/**
- * function ansi.set_color3 - Set the ansi Select Graphic Rendition mode.
- * @fg: Foreground color to set.
- * @bg: Background color to set.
- * @attr: Color attribute to set.
- *
- * Description: Sends ansi code for Select Graphic Rendition mode for the
- * given forground color, Black (30), Blue (34), Green (32), Cyan (36),
- * Red (31), Purple (35), Brown (33), Light Gray (37), the given
- * background color, Black (40), Red (41), Green (42), Yellow (43),
- * Blue (44), Magenta (45), Cyan (46), White (47) and the color attribute
- * All attributes off (0), Intensity Bold (1), Underline Single (4),
- * Blink Slow (5), Blink Rapid (6), Image Negative (7).
- */
-static int ktap_lib_set_color3(ktap_state *ks)
-{
-	int fg, bg, attr;
-
-	kp_arg_check(ks, 1, KTAP_TNUMBER);
-	kp_arg_check(ks, 2, KTAP_TNUMBER);
-	kp_arg_check(ks, 3, KTAP_TNUMBER);
-
-	fg = nvalue(kp_arg(ks, 1));
-	bg = nvalue(kp_arg(ks, 2));
-	attr = nvalue(kp_arg(ks, 3));
-
-	if (attr)
-		kp_printf(ks, "\033[%d;%d;%dm", fg, bg, attr);
-	else
-		kp_printf(ks, "\033[%d;%dm", fg, bg);
-	
-	return 0;
-}
-
-/**
- * function ansi.reset_color - Resets Select Graphic Rendition mode.
- *
- * Description: Sends ansi code to reset foreground, background and color
- * attribute to default values.
- */
-static int ktap_lib_reset_color(ktap_state *ks)
-{
-	kp_printf(ks, "\033[0;0m");
-	return 0;
-}
-
-/**
- * function ansi.new_line - Move cursor to new line.
- *
- * Description: Sends ansi code new line.
- */
-static int ktap_lib_new_line (ktap_state *ks)
-{
-	kp_printf(ks, "\12");
-	return 0;
-}
-
-static const ktap_Reg ansi_funcs[] = {
-	{"clear_screen", ktap_lib_clear_screen},
-	{"set_color", ktap_lib_set_color},
-	{"set_color2", ktap_lib_set_color2},
-	{"set_color3", ktap_lib_set_color3},
-	{"reset_color", ktap_lib_reset_color},
-	{"new_line", ktap_lib_new_line},
-	{NULL}
-};
-
-void kp_init_ansilib(ktap_state *ks)
-{
-	kp_register_lib(ks, "ansi", ansi_funcs); 
-}
diff --git a/drivers/staging/ktap/interpreter/library/baselib.c b/drivers/staging/ktap/interpreter/library/baselib.c
deleted file mode 100644
index 4bcdc62..0000000
--- a/drivers/staging/ktap/interpreter/library/baselib.c
+++ /dev/null
@@ -1,455 +0,0 @@
-/*
- * baselib.c - ktapvm kernel module base library
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/hardirq.h>
-#include <linux/kallsyms.h>
-#include <linux/sched.h>
-#include <linux/uaccess.h>
-#include <linux/utsname.h>
-#include <linux/time.h>
-#include <linux/clocksource.h>
-#include <linux/ring_buffer.h>
-#include <linux/stacktrace.h>
-#include "../../include/ktap.h"
-
-static int ktap_lib_next(ktap_state *ks)
-{
-	ktap_table *t = hvalue(ks->top - 2);
-
-	if (kp_table_next(ks, t, ks->top-1)) {
-		ks->top += 1;
-		return 2;
-	} else {
-		ks->top -= 1;
-		setnilvalue(ks->top++);
-		return 1;
-	}
-}
-
-static int ktap_lib_pairs(ktap_state *ks)
-{
-	ktap_value *v = kp_arg(ks, 1);
-	ktap_table *t;
-
-	if (G(ks)->mainthread != ks) {
-		kp_error(ks, "only mainthread can call table pairs\n");
-		return -1;
-	}
-
-	if (ttistable(v)) {
-		t = hvalue(v);
-	} else if (ttisaggrtable(v)) {
-		t = kp_aggrtable_synthesis(ks, ahvalue(v));
-	} else if (isnil(v)) {
-		kp_error(ks, "table is nil in pairs\n");
-		return 0;
-	} else {
-		kp_error(ks, "wrong argument for pairs\n");
-		return 0;
-	}
-
-	setfvalue(ks->top++, ktap_lib_next);
-	sethvalue(ks->top++, t);
-	setnilvalue(ks->top++);
-	return 3;
-}
-
-static int ktap_lib_len(ktap_state *ks)
-{
-	int len = kp_objlen(ks, kp_arg(ks, 1));
-
-	if (len < 0)
-		return -1;
-
-	setnvalue(ks->top, len);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_print(ktap_state *ks)
-{
-	int i;
-	int n = kp_arg_nr(ks);
-
-	for (i = 1; i <= n; i++) {
-		ktap_value *arg = kp_arg(ks, i);
-		if (i > 1)
-			kp_puts(ks, "\t");
-		kp_showobj(ks, arg);
-	}
-
-	kp_puts(ks, "\n");
-
-	return 0;
-}
-
-/* don't engage with tstring when printf, use buffer directly */
-static int ktap_lib_printf(ktap_state *ks)
-{
-	struct trace_seq *seq;
-
-	preempt_disable_notrace();
-
-	seq = kp_percpu_data(KTAP_PERCPU_DATA_BUFFER);
-	trace_seq_init(seq);
-
-	if (kp_strfmt(ks, seq))
-		return 0;
-
-	seq->buffer[seq->len] = '\0';
-	kp_transport_write(ks, seq->buffer, seq->len + 1);
-
-	preempt_enable_notrace();
-	return 0;
-}
-
-#ifdef CONFIG_STACKTRACE
-static int ktap_lib_print_backtrace(ktap_state *ks)
-{
-	kp_transport_print_backtrace(ks);
-	return 0;
-}
-#else
-static int ktap_lib_print_backtrace(ktap_state *ks)
-{
-	kp_error(ks, "Please enable CONFIG_STACKTRACE before use "
-		     "ktap print_backtrace\n");
-	return 0;
-}
-#endif
-
-static int ktap_lib_backtrace(ktap_state *ks)
-{
-	struct stack_trace trace;
-	ktap_btrace *bt;
-
-	bt = kp_percpu_data(KTAP_PERCPU_DATA_BTRACE);
-
-	trace.nr_entries = 0;
-	trace.skip = 10;
-	trace.max_entries = KTAP_STACK_MAX_ENTRIES;
-	trace.entries = &bt->entries[0];
-	save_stack_trace(&trace);
-
-	bt->nr_entries = trace.nr_entries;
-	setbtvalue(ks->top, bt);
-	incr_top(ks);
-	return 1;
-}
-
-extern unsigned long long ns2usecs(cycle_t nsec);
-static int ktap_lib_print_trace_clock(ktap_state *ks)
-{
-	unsigned long long t;
-	unsigned long secs, usec_rem;
-	u64 timestamp;
-
-	/* use ring buffer's timestamp */
-	timestamp = ring_buffer_time_stamp(G(ks)->buffer, smp_processor_id());
-
-	t = ns2usecs(timestamp);
-	usec_rem = do_div(t, USEC_PER_SEC);
-	secs = (unsigned long)t;
-
-	kp_printf(ks, "%5lu.%06lu\n", secs, usec_rem);
-
-	return 0;
-}
-
-static int ktap_lib_exit(ktap_state *ks)
-{
-	kp_exit(ks);
-
-	/* do not execute bytecode any more in this thread */
-	return -1;
-}
-
-static int ktap_lib_pid(ktap_state *ks)
-{
-	pid_t pid = task_tgid_vnr(current);
-
-	setnvalue(ks->top, (int)pid);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_tid(ktap_state *ks)
-{
-	pid_t pid = task_pid_vnr(current);
-
-	setnvalue(ks->top, (int)pid);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_execname(ktap_state *ks)
-{
-	ktap_string *ts = kp_tstring_new(ks, current->comm);
-	setsvalue(ks->top, ts);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_cpu(ktap_state *ks)
-{
-	setnvalue(ks->top, smp_processor_id());
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_num_cpus(ktap_state *ks)
-{
-	setnvalue(ks->top, num_online_cpus());
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_in_interrupt(ktap_state *ks)
-{
-	int ret = in_interrupt();
-
-	setnvalue(ks->top, ret);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_arch(ktap_state *ks)
-{
-	setsvalue(ks->top, kp_tstring_new(ks, utsname()->machine));
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_kernel_v(ktap_state *ks)
-{
-	setsvalue(ks->top, kp_tstring_new(ks, utsname()->release));
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_user_string(ktap_state *ks)
-{
-	unsigned long addr;
-	char str[256] = {0};
-	int ret;
-
-	kp_arg_check(ks, 1, KTAP_TNUMBER);
-
-	addr = nvalue(kp_arg(ks, 1));
-
-	pagefault_disable();
-	ret = __copy_from_user_inatomic((void *)str, (const void *)addr, 256);
-	(void) &ret;  /* Silence compiler warning. */
-	pagefault_enable();
-	str[255] = '\0';
-	setsvalue(ks->top, kp_tstring_new(ks, str));
-
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_histogram(ktap_state *ks)
-{
-	ktap_value *v = kp_arg(ks, 1);
-
-	if (G(ks)->mainthread != ks) {
-		kp_error(ks, "only mainthread can call table historgram\n");
-		return -1;
-	}
-
-	if (ttistable(v))
-		kp_table_histogram(ks, hvalue(v));
-	else if (ttisaggrtable(v))
-		kp_aggrtable_histogram(ks, ahvalue(v));
-
-	return 0;
-}
-
-static int ktap_lib_aggr_table(ktap_state *ks)
-{
-	ktap_aggrtable *ah;
-
-	ah = kp_aggrtable_new(ks);
-	setahvalue(ks->top, ah);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_aggr_count(ktap_state *ks)
-{
-	setaggrvalue(ks->top, AGGREGATION_TYPE_COUNT);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_aggr_max(ktap_state *ks)
-{
-	kp_arg_check(ks, 1, KTAP_TNUMBER);
-
-	ks->aggr_accval = nvalue(kp_arg(ks, 1));
-	setaggrvalue(ks->top, AGGREGATION_TYPE_MAX);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_aggr_min(ktap_state *ks)
-{
-	kp_arg_check(ks, 1, KTAP_TNUMBER);
-
-	ks->aggr_accval = nvalue(kp_arg(ks, 1));
-	setaggrvalue(ks->top, AGGREGATION_TYPE_MIN);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_aggr_sum(ktap_state *ks)
-{
-	kp_arg_check(ks, 1, KTAP_TNUMBER);
-
-	ks->aggr_accval = nvalue(kp_arg(ks, 1));
-	setaggrvalue(ks->top, AGGREGATION_TYPE_SUM);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_aggr_avg(ktap_state *ks)
-{
-	kp_arg_check(ks, 1, KTAP_TNUMBER);
-
-	ks->aggr_accval = nvalue(kp_arg(ks, 1));
-	setaggrvalue(ks->top, AGGREGATION_TYPE_AVG);
-	incr_top(ks);
-	return 1;
-}
-
-static int ktap_lib_delete(ktap_state *ks)
-{
-	kp_arg_check(ks, 1, KTAP_TTABLE);
-
-	kp_table_clear(ks, hvalue(kp_arg(ks, 1)));
-	return 0;
-}
-
-static int ktap_lib_gettimeofday_us(ktap_state *ks)
-{
-	setnvalue(ks->top, gettimeofday_us());
-	incr_top(ks);
-
-	return 1;
-}
-
-/*
- * use gdb to get field offset of struct task_struct, for example:
- *
- * gdb vmlinux
- * (gdb)p &(((struct task_struct *)0).prio)
- */
-static int ktap_lib_curr_task_info(ktap_state *ks)
-{
-	int offset;
-	int fetch_bytes;
-
-	kp_arg_check(ks, 1, KTAP_TNUMBER);
-
-	offset = nvalue(kp_arg(ks, 1));
-	
-	if (kp_arg_nr(ks) == 1)
-		fetch_bytes = 4; /* default fetch 4 bytes*/
-	else {
-		kp_arg_check(ks, 2, KTAP_TNUMBER);
-		fetch_bytes = nvalue(kp_arg(ks, 2));
-	}
-
-	if (offset >= sizeof(struct task_struct)) {
-		setnilvalue(ks->top++);
-		kp_error(ks, "access out of bound value of task_struct\n");
-		return 1;
-	}
-
-#define RET_VALUE ((unsigned long)current + offset)
-
-	switch (fetch_bytes) {
-	case 4:
-		setnvalue(ks->top, *(unsigned int *)RET_VALUE);
-		break;
-	case 8:
-		setnvalue(ks->top, *(unsigned long *)RET_VALUE);
-		break;
-	default:
-		kp_error(ks, "unsupported fetch bytes in curr_task_info\n");
-		setnilvalue(ks->top);
-		break;
-	}
-
-#undef RET_VALUE
-
-	incr_top(ks);
-	return 1;
-}
-
-/*
- * This built-in function mainly purpose scripts/schedule/schedtimes.kp
- */
-static int ktap_lib_in_iowait(ktap_state *ks)
-{
-	setnvalue(ks->top, current->in_iowait);
-	incr_top(ks);
-
-	return 1;
-}
-
-static const ktap_Reg base_funcs[] = {
-	{"pairs", ktap_lib_pairs},
-	{"len", ktap_lib_len},
-	{"print", ktap_lib_print},
-	{"printf", ktap_lib_printf},
-	{"print_backtrace", ktap_lib_print_backtrace},
-	{"backtrace", ktap_lib_backtrace},
-	{"print_trace_clock", ktap_lib_print_trace_clock},
-	{"in_interrupt", ktap_lib_in_interrupt},
-	{"exit", ktap_lib_exit},
-	{"pid", ktap_lib_pid},
-	{"tid", ktap_lib_tid},
-	{"execname", ktap_lib_execname},
-	{"cpu", ktap_lib_cpu},
-	{"num_cpus", ktap_lib_num_cpus},
-	{"arch", ktap_lib_arch},
-	{"kernel_v", ktap_lib_kernel_v},
-	{"user_string", ktap_lib_user_string},
-	{"histogram", ktap_lib_histogram},
-	{"aggr_table", ktap_lib_aggr_table},
-	{"count", ktap_lib_aggr_count},
-	{"max", ktap_lib_aggr_max},
-	{"min", ktap_lib_aggr_min},
-	{"sum", ktap_lib_aggr_sum},
-	{"avg", ktap_lib_aggr_avg},
-
-	{"delete", ktap_lib_delete},
-	{"gettimeofday_us", ktap_lib_gettimeofday_us},
-	{"curr_taskinfo", ktap_lib_curr_task_info},
-	{"in_iowait", ktap_lib_in_iowait},
-	{NULL}
-};
-
-void kp_init_baselib(ktap_state *ks)
-{
-	kp_register_lib(ks, NULL, base_funcs); 
-}
diff --git a/drivers/staging/ktap/interpreter/library/kdebug.c b/drivers/staging/ktap/interpreter/library/kdebug.c
deleted file mode 100644
index a9477be..0000000
--- a/drivers/staging/ktap/interpreter/library/kdebug.c
+++ /dev/null
@@ -1,449 +0,0 @@
-/*
- * kdebug.c - ktap probing core implementation
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/module.h>
-#include <linux/ctype.h>
-#include <linux/version.h>
-#include <linux/ftrace_event.h>
-#include "../../include/ktap.h"
-
-static void ktap_call_probe_closure(ktap_state *mainthread, ktap_closure *cl,
-				    struct ktap_event *e)
-{
-	ktap_state *ks;
-	ktap_value *func;
-
-	ks = kp_newthread(mainthread);
-	setcllvalue(ks->top, cl);
-	func = ks->top;
-	incr_top(ks);
-
-	ks->current_event = e;
-
-	kp_call(ks, func, 0);
-
-	ks->current_event = NULL;
-	kp_exitthread(ks);
-}
-
-void kp_event_tostring(ktap_state *ks, struct trace_seq *seq)
-{
-	struct ktap_event *e = ks->current_event;
-	struct trace_iterator *iter;
-	struct trace_event *ev;
-	enum print_line_t ret = TRACE_TYPE_NO_CONSUME;
-
-	/* Simulate the iterator */
-
-	/*
-	 * use temp percpu buffer as trace_iterator
-	 * we cannot use same temp buffer as printf.
-	 */
-	iter = kp_percpu_data(KTAP_PERCPU_DATA_BUFFER2);
-
-	trace_seq_init(&iter->seq);
-	iter->ent = e->entry;
-
-	ev = &(e->call->event);
-	if (ev)
-		ret = ev->funcs->trace(iter, 0, ev);
-
-	if (ret != TRACE_TYPE_NO_CONSUME) {
-		struct trace_seq *s = &iter->seq;
-		int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
-
-		s->buffer[len] = '\0';
-		trace_seq_puts(seq, s->buffer);
-	}
-}
-
-#if 0
-/* check pt_regs defintion in linux/arch/x86/include/asm/ptrace.h */
-/* support other architecture pt_regs showing */
-static void event_regstr(ktap_state *ks, struct ktap_event *e, StkId ra)
-{
-	struct pt_regs *regs = e->regs;
-	char str[256] = {0};
-
-#if defined(CONFIG_X86_32)
-	snprintf(str, sizeof(str),
-		"{ax: 0x%lx, orig_ax: 0x%lx, bx: 0x%lx, cx: 0x%lx, dx: 0x%lx, "
-		"si: 0x%lx, di: 0x%lx, bp: 0x%lx, ds: 0x%lx, es: 0x%lx, fs: 0x%lx, "
-		"gs: 0x%lx, ip: 0x%lx, cs: 0x%lx, flags: 0x%lx, sp: 0x%lx, ss: 0x%lx}\n",
-		regs->ax, regs->orig_ax, regs->bx, regs->cx, regs->dx,
-		regs->si, regs->di, regs->bp, regs->ds, regs->es, regs->fs,
-		regs->gs, regs->ip, regs->cs, regs->flags, regs->sp, regs->ss);
-#elif defined(CONFIG_X86_64)
-	/* x86_64 pt_regs doesn't have ds, es, fs or gs. */
-	snprintf(str, sizeof(str),
-		"{ax: 0x%lx, orig_ax: 0x%lx, bx: 0x%lx, cx: 0x%lx, dx: 0x%lx, "
-		"si: 0x%lx, di: 0x%lx, r8: 0x%lx, r9: 0x%lx, r10: 0x%lx, r11: 0x%lx, "
-		"r12: 0x%lx, r13: 0x%lx, r14: 0x%lx, r15: 0x%lx, bp: 0x%lx, ip: 0x%lx, "
-		"cs: 0x%lx, flags: 0x%lx, sp: 0x%lx, ss: 0x%lx}\n",
-		regs->ax, regs->orig_ax, regs->bx, regs->cx, regs->dx,
-		regs->si, regs->di, regs->r8, regs->r9, regs->r10, regs->r11,
-		regs->r12, regs->r13, regs->r14, regs->r15, regs->bp, regs->ip,
-		regs->cs, regs->flags, regs->sp, regs->ss);
-#endif
-	setsvalue(ra, kp_tstring_new_local(ks, str));
-}
-#endif
-
-/***************************/
-/* This definition should keep update with kernel/trace/trace.h */
-struct ftrace_event_field {
-	struct list_head        link;
-	const char              *name;
-	const char              *type;
-	int                     filter_type;
-	int                     offset;
-	int                     size;
-	int                     is_signed;
-};
-
-static struct list_head *ktap_get_fields(struct ftrace_event_call *event_call)
-{
-	if (!event_call->class->get_fields)
-		return &event_call->class->fields;
-	return event_call->class->get_fields(event_call);
-}
-
-static void get_field_value(ktap_state *ks, struct ktap_event *e,
-			    struct ftrace_event_field *field, ktap_value *ra)
-{
-	void *value = (unsigned char *)e->entry + field->offset;
-
-	if (field->size == 4) {
-		int n = *(int *)value;
-		setnvalue(ra, n);
-		return;
-	} else if (field->size == 8) {
-		long n = *(long *)value;
-		setnvalue(ra, n);
-		return;
-	}
-
-	if (!strncmp(field->type, "char", 4)) {
-		setsvalue(ra, kp_tstring_new(ks, (char *)value));
-		return;
-	}
-}
-
-void kp_event_getarg(ktap_state *ks, ktap_value *ra, int n)
-{
-	struct ktap_event *e = ks->current_event;
-	int index = n;
-	struct ftrace_event_field *field;
-	struct list_head *head;
-
-	/* this is very slow and not safe, fix it in future */
-	head = ktap_get_fields(e->call);
-	list_for_each_entry_reverse(field, head, link) {
-		if (--index == 0) {
-			get_field_value(ks, e, field, ra);
-			return;
-		}
-	}
-
-	setnilvalue(ra);
-	return;
-}
-
-/* Callback function for perf event subsystem
- * make ktap reentrant, don't disable irq in callback function,
- * same as perf and ftrace. to make reentrant, we need some
- * percpu data to be context isolation(irq/sirq/nmi/process)
- *
- * perf callback already consider on the recursion issue,
- * so ktap don't need to check again in here.
- *
- * Note tracepoint handler is calling with rcu_read_lock.
- */
-static void ktap_overflow_callback(struct perf_event *event,
-				   struct perf_sample_data *data,
-				   struct pt_regs *regs)
-{
-	struct ktap_probe_event *ktap_pevent;
-	struct ktap_event e;
-	ktap_state  *ks;
-	int rctx;
-
-	ktap_pevent = event->overflow_handler_context;
-	ks = ktap_pevent->ks;
-
-	if (unlikely(ks->stop))
-		return;
-
-	rctx = get_recursion_context();
-	if (rctx < 0)
-		return;
-
-	/* profile perf event don't have valid associated tp_event */
-	if (event->tp_event) {
-		e.call = event->tp_event;
-		e.entry = data->raw->data;
-		e.entry_size = data->raw->size;
-	}
-	e.pevent = ktap_pevent;
-	e.regs = regs;
-
-	ktap_call_probe_closure(ks, ktap_pevent->cl, &e);
-
-	put_recursion_context(rctx);
-}
-
-static void perf_destructor(struct ktap_probe_event *ktap_pevent)
-{
-	perf_event_release_kernel(ktap_pevent->perf);
-}
-
-static int (*kp_ftrace_profile_set_filter)(struct perf_event *event,
-					   int event_id, char *filter_str);
-
-/*
- * Generic perf event register function
- * used by tracepoints/kprobe/uprobe/profile-timer/hw_breakpoint.
- */
-void kp_perf_event_register(ktap_state *ks, struct perf_event_attr *attr,
-			    struct task_struct *task, char *filter,
-			    ktap_closure *cl)
-{
-	struct ktap_probe_event *ktap_pevent;
-	struct perf_event *event;
-	int cpu, ret;
-
-	kp_verbose_printf(ks, "enable perf event id: %d, filter: %s "
-			      "pid: %d\n", attr->config, filter,
-			      task ? task_tgid_vnr(task) : -1);
-
-	/*
-	 * don't tracing until ktap_wait, the reason is:
-	 * 1). some event may hit before apply filter
-	 * 2). more simple to manage tracing thread
-	 * 3). avoid race with mainthread.
-	 *
-	 * Another way to do this is make attr.disabled as 1, then use
-	 * perf_event_enable after filter apply, however, perf_event_enable
-	 * was not exported in kernel older than 3.3, so we drop this method.
-	 */
-	ks->stop = 1;
-
-	for_each_cpu(cpu, G(ks)->cpumask) {
-		ktap_pevent = kp_zalloc(ks, sizeof(*ktap_pevent));
-		ktap_pevent->ks = ks;
-		ktap_pevent->cl = cl;
-		event = perf_event_create_kernel_counter(attr, cpu, task,
-							 ktap_overflow_callback,
-							 ktap_pevent);
-		if (IS_ERR(event)) {
-			int err = PTR_ERR(event);
-			kp_error(ks, "unable register perf event %d on cpu %d, "
-				     "err: %d\n", attr->config, cpu, err);
-			kp_free(ks, ktap_pevent);
-			return;
-		}
-
-		ktap_pevent->perf = event;
-		INIT_LIST_HEAD(&ktap_pevent->list);
-		list_add_tail(&ktap_pevent->list, &G(ks)->probe_events_head);
-
-		if (!filter)
-			continue;
-
-		ret = kp_ftrace_profile_set_filter(event, attr->config, filter);
-		if (ret) {
-			kp_error(ks, "unable set filter %s for event id %d, "
-				     "ret: %d\n", filter, attr->config, ret);
-			perf_destructor(ktap_pevent);
-			list_del(&ktap_pevent->list);
-			kp_free(ks, ktap_pevent);
-			return;
-		}
-	}
-}
-
-static void end_probes(struct ktap_state *ks)
-{
-	struct ktap_probe_event *ktap_pevent;
-	struct list_head *tmp, *pos;
-	struct list_head *head = &G(ks)->probe_events_head;
-
-	list_for_each(pos, head) {
-		ktap_pevent = container_of(pos, struct ktap_probe_event,
-					   list);
-		perf_destructor(ktap_pevent);
-        }
-       	/*
-	 * Ensure our callback won't be called anymore. The buffers
-	 * will be freed after that.
-	 */
-	tracepoint_synchronize_unregister();
-
-	list_for_each_safe(pos, tmp, head) {
-		ktap_pevent = container_of(pos, struct ktap_probe_event,
-					   list);
-		list_del(&ktap_pevent->list);
-		kp_free(ks, ktap_pevent);
-	}
-}
-
-static int ktap_lib_probe_by_id(ktap_state *ks)
-{
-	const char *ids_str;
-	char *start;
-	ktap_closure *cl;
-	struct task_struct *task = G(ks)->trace_task;
-	char filter_str[128] = {0};
-	char *filter, *ptr1, *sep, *ptr;
-
-	kp_arg_check(ks, 1, KTAP_TSTRING);
-	kp_arg_check(ks, 2, KTAP_TFUNCTION);
-
-	ids_str = svalue(kp_arg(ks, 1));
-	cl = clvalue(kp_arg(ks, 2));
-
-	start = (char *)ids_str;
-
- again:
-	filter = NULL;
-
-	sep = strchr(start, ',');
-	if (!sep)
-		ptr1 = strchr(start, '/');
-	else
-		ptr1 = strnchr(start, sep - start, '/');
-
-	if (ptr1) {
-		char *ptr2 = strrchr(ptr1 + 1, '/');
-
-		if (ptr2) {
-			memset(filter_str, 0, sizeof(filter_str));
-			strncpy(filter_str, ptr1 + 1, ptr2 - ptr1 - 1);
-			filter = &filter_str[0];
-		} else {
-			kp_printf(ks, "cannot parse ids_str: %s\n", ids_str);
-			return -1;
-		}
-	}
-
-	for (ptr = start; *ptr != ',' && *ptr != '\0' && *ptr != '/'; ptr++) {
-		char token[32] = {0};
-		int id;
-		int i = 0;
-
-		if (*ptr == ' ')
-			continue;
-
-		while (isdigit(*ptr)) {
-			token[i++] = *ptr++;
-		}
-
-		if (!kstrtoint(token, 10, &id)) {
-			struct perf_event_attr attr;
-
-			memset(&attr, 0, sizeof(attr));
-			attr.type = PERF_TYPE_TRACEPOINT;	
-			attr.config = id;
-			attr.sample_type = PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
-					   PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD;
-			attr.sample_period = 1;
-			attr.size = sizeof(attr);
-			attr.disabled = 0;
-
-			kp_perf_event_register(ks, &attr, task, filter, cl);
-		}
-	}
-
-	if (sep && (*(sep + 1) != '\0')) {
-		start = sep + 1;
-		goto again;
-	}
-
-	return 0;
-}
-
-static int ktap_lib_probe_end(ktap_state *ks)
-{
-	kp_arg_check(ks, 1, KTAP_TFUNCTION);
-
-	G(ks)->trace_end_closure = clvalue(kp_arg(ks, 1));
-	return 0;
-}
-
-static int ktap_lib_traceoff(ktap_state *ks)
-{
-	end_probes(ks);
-
-	/* call trace_end_closure after probed end */
-	if (G(ks)->trace_end_closure) {
-		setcllvalue(ks->top, G(ks)->trace_end_closure);
-		incr_top(ks);
-		kp_call(ks, ks->top - 1, 0);
-		G(ks)->trace_end_closure = NULL;
-	}
-
-	return 0;
-}
-
-void kp_probe_exit(ktap_state *ks)
-{
-	if (!G(ks)->trace_enabled)
-		return;
-
-	end_probes(ks);
-
-	/* call trace_end_closure after probed end */
-	if (!G(ks)->error && G(ks)->trace_end_closure) {
-		setcllvalue(ks->top, G(ks)->trace_end_closure);
-		incr_top(ks);
-		kp_call(ks, ks->top - 1, 0);
-		G(ks)->trace_end_closure = NULL;
-	}
-
-	G(ks)->trace_enabled = 0;
-}
-
-int kp_probe_init(ktap_state *ks)
-{
-	G(ks)->trace_enabled = 1;
-	return 0;
-}
-
-static const ktap_Reg kdebuglib_funcs[] = {
-	{"probe_by_id", ktap_lib_probe_by_id},
-	{"probe_end", ktap_lib_probe_end},
-	{"traceoff", ktap_lib_traceoff},
-	{NULL}
-};
-
-void kp_init_kdebuglib(ktap_state *ks)
-{
-	kp_ftrace_profile_set_filter =
-		(void *)kallsyms_lookup_name("ftrace_profile_set_filter");
-	if (!kp_ftrace_profile_set_filter) {
-		printk("ktap: cannot lookup ftrace_profile_set_filter "
-		       "in kallsyms\n");
-		return;
-	}
-
-	kp_register_lib(ks, "kdebug", kdebuglib_funcs);
-}
-
diff --git a/drivers/staging/ktap/interpreter/library/timer.c b/drivers/staging/ktap/interpreter/library/timer.c
deleted file mode 100644
index 759f917..0000000
--- a/drivers/staging/ktap/interpreter/library/timer.c
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * timer.c - timer library support for ktap
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/ctype.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/sched.h>
-#include "../../include/ktap.h"
-
-struct hrtimer_ktap {
-	struct hrtimer timer;
-	ktap_state *ks;
-	ktap_closure *cl;
-	u64 ns;
-	struct list_head list;
-};
-
-/*
- * Currently ktap disallow tracing event in timer callback closure,
- * that will corrupt ktap_state and ktap stack, because timer closure
- * and event closure use same irq percpu ktap_state and stack.
- * We can use a different percpu ktap_state and stack for timer purpuse,
- * but that's don't bring any big value with cost on memory consuming.
- *
- * So just simply disable tracing in timer closure,
- * get_recursion_context()/put_recursion_context() is used for this purpose.
- *
- * option: export perf_swevent_put_recursion_context to slove this issue.
- */
-static enum hrtimer_restart hrtimer_ktap_fn(struct hrtimer *timer)
-{
-	struct hrtimer_ktap *t;
-	ktap_state *ks;
-	int rctx;
-
-	rcu_read_lock_sched_notrace();
-	rctx = get_recursion_context();
-
-	t = container_of(timer, struct hrtimer_ktap, timer);
-
-	ks = kp_newthread(t->ks);
-	setcllvalue(ks->top, t->cl);
-	incr_top(ks);
-	kp_call(ks, ks->top - 1, 0);
-	kp_exitthread(ks);
-
-	hrtimer_add_expires_ns(timer, t->ns);
-
-	put_recursion_context(rctx);
-	rcu_read_unlock_sched_notrace();
-
-	return HRTIMER_RESTART;
-}
-
-static void set_tick_timer(ktap_state *ks, u64 period, ktap_closure *cl)
-{
-	struct hrtimer_ktap *t;
-
-	t = kp_malloc(ks, sizeof(*t));
-	t->ks = ks;
-	t->cl = cl;
-	t->ns = period;
-
-	INIT_LIST_HEAD(&t->list);
-	list_add(&t->list, &(G(ks)->timers));
-
-	hrtimer_init(&t->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
-	t->timer.function = hrtimer_ktap_fn;
-	hrtimer_start(&t->timer, ns_to_ktime(period), HRTIMER_MODE_REL);
-}
-
-static void set_profile_timer(ktap_state *ks, u64 period, ktap_closure *cl)
-{
-	struct perf_event_attr attr;
-
-	memset(&attr, 0, sizeof(attr));
-	attr.type = PERF_TYPE_SOFTWARE;
-	attr.config = PERF_COUNT_SW_CPU_CLOCK;
-	attr.sample_type = PERF_SAMPLE_RAW | PERF_SAMPLE_TIME |
-			   PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD;
-	attr.sample_period = period;
-	attr.size = sizeof(attr);
-	attr.disabled = 0;
-
-	kp_perf_event_register(ks, &attr, NULL, NULL, cl);
-}
-
-static int do_tick_profile(ktap_state *ks, int is_tick)
-{
-	const char *str, *tmp;
-	char interval_str[32] = {0};
-	char suffix[10] = {0};
-	int n, i = 0;
-	int factor;
-
-	kp_arg_check(ks, 1, KTAP_TSTRING);
-	kp_arg_check(ks, 2, KTAP_TFUNCTION);
-
-	str = svalue(kp_arg(ks, 1));
-	tmp = str;
-	while (isdigit(*tmp))
-		tmp++;
-
-	strncpy(interval_str, str, tmp - str);
-	if (kstrtoint(interval_str, 10, &n))
-		goto error;
-
-	strncpy(suffix, tmp, 9);
-	while (suffix[i] != ' ' && suffix[i] != '\0')
-		i++;
-
-	suffix[i] = '\0';
-
-	if (!strcmp(suffix, "s") || !strcmp(suffix, "sec"))
-		factor = NSEC_PER_SEC;
-	else if (!strcmp(suffix, "ms") || !strcmp(suffix, "msec"))
-		factor = NSEC_PER_MSEC;
-	else if (!strcmp(suffix, "us") || !strcmp(suffix, "usec"))
-		factor = NSEC_PER_USEC;
-	else
-		goto error;
-
-	if (is_tick)
-		set_tick_timer(ks, (u64)factor * n, clvalue(kp_arg(ks, 2)));
-	else
-		set_profile_timer(ks, (u64)factor * n, clvalue(kp_arg(ks, 2)));
-
-	return 0;
-
- error:
-	kp_error(ks, "cannot parse timer interval: %s\n", str);
-	return -1;
-}
-
-/*
- * tick-n probes fire on only one CPU per interval.
- * valid time suffixes: sec/s, msec/ms, usec/us
- */
-static int ktap_lib_tick(ktap_state *ks)
-{
-	return do_tick_profile(ks, 1);
-}
-
-/*
- * A profile-n probe fires every fixed interval on every CPU
- * valid time suffixes: sec/s, msec/ms, usec/us
- */
-static int ktap_lib_profile(ktap_state *ks)
-{
-	return do_tick_profile(ks, 0);
-}
-
-void kp_exit_timers(ktap_state *ks)
-{
-	struct hrtimer_ktap *t, *tmp;
-	struct list_head *timers_list = &(G(ks)->timers);
-
-	list_for_each_entry_safe(t, tmp, timers_list, list) {
-		hrtimer_cancel(&t->timer);
-		kp_free(ks, t);
-	}
-}
-
-static const ktap_Reg timerlib_funcs[] = {
-	{"profile",	ktap_lib_profile},
-	{"tick",	ktap_lib_tick},
-	{NULL}
-};
-
-void kp_init_timerlib(ktap_state *ks)
-{
-	kp_register_lib(ks, "timer", timerlib_funcs);
-}
-
diff --git a/drivers/staging/ktap/interpreter/loader.c b/drivers/staging/ktap/interpreter/loader.c
deleted file mode 100644
index 0da54d7..0000000
--- a/drivers/staging/ktap/interpreter/loader.c
+++ /dev/null
@@ -1,310 +0,0 @@
-/*
- * loader.c - loader for ktap bytecode chunk file
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/slab.h>
-#include "../include/ktap.h"
-
-#define KTAPC_TAIL	"\x19\x93\r\n\x1a\n"
-
-struct load_state {
-	unsigned char *buff;
-	int pos;
-	ktap_state *ks;
-};
-
-#define READ_CHAR(S)  (S->buff[S->pos++])
-#define READ_BYTE(S)  READ_CHAR(S)
-#define READ_INT(S)  load_int(S)
-#define READ_NUMBER(S) load_number(S)
-#define READ_STRING(S)	load_string(S)
-#define READ_VECTOR(S, dst, size)  \
-	do {	\
-		memcpy(dst, &S->buff[S->pos], size);	\
-		S->pos += size;	\
-	} while(0)
-
-#define NEW_VECTOR(S, size)	kp_malloc(S->ks, size)
-#define GET_CURRENT(S)		&S->buff[S->pos]
-#define ADD_POS(S, size)	S->pos += size
-
-
-static int load_function(struct load_state *S, ktap_proto *f);
-
-
-static int load_int(struct load_state *S)
-{
-	int x;
-
-	READ_VECTOR(S, &x, sizeof(int));
-	return x;
-}
-
-static int load_number(struct load_state *S)
-{
-	int x;
-
-	READ_VECTOR(S, &x, sizeof(ktap_number));
-	return x;
-}
-
-static ktap_string *load_string(struct load_state *S)
-{
-	ktap_string *ts;
-	size_t size;
-
-	size = READ_INT(S);
-
-	if (!size)
-		return NULL;
-	else {
-		char *s = GET_CURRENT(S);
-		ADD_POS(S, size);
-		/* remove trailing '\0' */
-		ts = kp_tstring_newlstr(S->ks, s, size - 1);
-		return ts;
-	}
-}
-
-
-static int load_code(struct load_state *S, ktap_proto *f)
-{
-	int n = READ_INT(S);
-
-	f->sizecode = n;
-	f->code = NEW_VECTOR(S, n * sizeof(ktap_instruction));
-	READ_VECTOR(S, f->code, n * sizeof(ktap_instruction));
-
-	return 0;
-}
-
-static int load_constants(struct load_state *S, ktap_proto *f)
-{
-	int i,n;
-
-	n = READ_INT(S);
-
-	f->sizek = n;
-	f->k = NEW_VECTOR(S, n * sizeof(ktap_value));
-	for (i = 0; i < n; i++)
-		setnilvalue(&f->k[i]);
-
-	for (i=0; i < n; i++) {
-		ktap_value *o = &f->k[i];
-
-		int t = READ_CHAR(S);
-		switch (t) {
-		case KTAP_TNIL:
-			setnilvalue(o);
-			break;
-		case KTAP_TBOOLEAN:
-			setbvalue(o, READ_CHAR(S));
-			break;
-		case KTAP_TNUMBER:
-			/*
-			 * todo: kernel not support fp, check double when
-			 * loading
-			 */
-			setnvalue(o, READ_NUMBER(S));
-			break;
-		case KTAP_TSTRING:
-			setsvalue(o, READ_STRING(S));
-			break;
-		default:
-			kp_error(S->ks, "ktap: load_constants: "
-					"unknow ktap_value\n");
-			return -1;
-			
-		}
-	}
-
-	n = READ_INT(S);
-	f->p = NEW_VECTOR(S, n * sizeof(ktap_proto));
-	f->sizep = n;
-	for (i = 0; i < n; i++)
-		f->p[i] = NULL;
-	for (i = 0; i < n; i++) {
-		f->p[i] = kp_newproto(S->ks);
-		if (load_function(S, f->p[i]))
-			return -1;
-	}
-
-	return 0;
-}
-
-
-static int load_upvalues(struct load_state *S, ktap_proto *f)
-{
-	int i,n;
-
-	n = READ_INT(S);
-	f->upvalues = NEW_VECTOR(S, n * sizeof(ktap_upvaldesc));
-	f->sizeupvalues = n;
-
-	for (i = 0; i < n; i++)
-		f->upvalues[i].name = NULL;
-
-	for (i = 0; i < n; i++) {
-		f->upvalues[i].instack = READ_BYTE(S);
-		f->upvalues[i].idx = READ_BYTE(S);
-	}
-
-	return 0;
-}
-
-static int load_debuginfo(struct load_state *S, ktap_proto *f)
-{
-	int i,n;
-
-	f->source = READ_STRING(S);
-	n = READ_INT(S);
-	f->sizelineinfo = n;
-	f->lineinfo = NEW_VECTOR(S, n * sizeof(int));
-	READ_VECTOR(S, f->lineinfo, n * sizeof(int));
-	n = READ_INT(S);
-	f->locvars = NEW_VECTOR(S, n * sizeof(struct ktap_locvar));
-	f->sizelocvars = n;
-	for (i = 0; i < n; i++)
-		f->locvars[i].varname = NULL;
-	for (i = 0; i < n; i++) {
-		f->locvars[i].varname = READ_STRING(S);
-		f->locvars[i].startpc = READ_INT(S);
-		f->locvars[i].endpc = READ_INT(S);
-	}
-	n = READ_INT(S);
-	for (i = 0; i < n; i++)
-		f->upvalues[i].name = READ_STRING(S);
-
-	return 0;
-}
-
-static int load_function(struct load_state *S, ktap_proto *f)
-{
-	f->linedefined = READ_INT(S);
- 	f->lastlinedefined = READ_INT(S);
-	f->numparams = READ_BYTE(S);
-	f->is_vararg = READ_BYTE(S);
-	f->maxstacksize = READ_BYTE(S);
-	if (load_code(S, f))
-		return -1;
-	if (load_constants(S, f))
-		return -1;
-	if (load_upvalues(S, f))
-		return -1;
-	if (load_debuginfo(S, f))
-		return -1;
-
-	return 0;
-}
-
-
-#define error(S, why) \
-	kp_error(S->ks, "load failed: %s precompiled chunk\n", why)
-
-#define N0	KTAPC_HEADERSIZE
-#define N1	(sizeof(KTAP_SIGNATURE) - sizeof(char))
-#define N2	N1 + 2
-#define N3	N2 + 6
-
-static int load_header(struct load_state *S)
-{
-	u8 h[KTAPC_HEADERSIZE];
-	u8 s[KTAPC_HEADERSIZE];
-
-	kp_header(h);
-	READ_VECTOR(S, s, KTAPC_HEADERSIZE);
-
-	if (memcmp(h, s, N0) == 0)
-		return 0;
-	if (memcmp(h, s, N1) != 0)
-		error(S, "not a");
-	else if (memcmp(h, s, N2) != 0)
-		error(S, "version mismatch in");
-	else if (memcmp(h, s, N3) != 0)
-		error(S, "incompatible");
-	else
-		error(S,"corrupted");
-
-	return -1;
-}
-
-
-static int verify_code(struct load_state *S, ktap_proto *f)
-{
-	/* not support now */
-	return 0;
-}
-
-
-ktap_closure *kp_load(ktap_state *ks, unsigned char *buff)
-{
-	struct load_state S;
-	ktap_closure *cl;
-	ktap_lclosure *f;
-	int ret, i;
-
-	S.ks = ks;
-	S.buff = buff;
-	S.pos = 0;
-
-	ret = load_header(&S);
-	if (ret)
-		return NULL;
-
-	cl = kp_newlclosure(ks, 1);
-	if (!cl)
-		return cl;
-
-	/* put closure on the top, prepare to run with this closure */
-	setcllvalue(ks->top, cl);
-	incr_top(ks);
-
-	cl->l.p = kp_newproto(ks);
-	if (load_function(&S, cl->l.p))
-		return NULL;
-
-	if (cl->l.p->sizeupvalues != 1) {
-		ktap_proto *p = cl->l.p;
-		cl = kp_newlclosure(ks, cl->l.p->sizeupvalues);
-		cl->l.p = p;
-		setcllvalue(ks->top - 1, cl);
-	}
-
-	f = &cl->l;
-	for (i = 0; i < f->nupvalues; i++) {  /* initialize upvalues */
-		ktap_upval *up = kp_newupval(ks);
-		f->upvals[i] = up;
-	}
-
-	/* set global table as 1st upvalue of 'f' */
-	if (f->nupvalues == 1) {
-		ktap_table *reg = hvalue(&G(ks)->registry);
-		const ktap_value *gt = kp_table_getint(reg, KTAP_RIDX_GLOBALS);
-		setobj(f->upvals[0]->v, gt);
-	}
-
-	verify_code(&S, cl->l.p);
-	return cl;
-}
-
diff --git a/drivers/staging/ktap/interpreter/object.c b/drivers/staging/ktap/interpreter/object.c
deleted file mode 100644
index 6538167..0000000
--- a/drivers/staging/ktap/interpreter/object.c
+++ /dev/null
@@ -1,483 +0,0 @@
-/*
- * object.c - ktap object generic operation
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifdef __KERNEL__
-#include "../include/ktap.h"
-#else
-#include "../include/ktap_types.h"
-#endif
-
-#ifdef __KERNEL__
-
-#define KTAP_ALLOC_FLAGS ((GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN) \
-			 & ~__GFP_WAIT)
-
-void *kp_malloc(ktap_state *ks, int size)
-{
-	void *addr;
-
-	/*
-	 * Normally we don't want to trace under memory pressure,
-	 * so we use a simple rule to handle memory allocation failure:
-	 *
-	 * retry until allocation success, this will make caller don't need
-	 * to handle the unlikely failure case, then ktap exit.
-	 *
-	 * In this approach, if user find there have memory allocation failure,
-	 * user should re-run the ktap script, or fix the memory pressure
-	 * issue, or figure out why the script need so many memory.
-	 *
-	 * Perhaps return pre-allocated stub memory trunk when allocate failed
-	 * is a better approch?
-	 */
-	addr = kmalloc(size, KTAP_ALLOC_FLAGS);
-	if (unlikely(!addr)) {
-		kp_error(ks, "kmalloc size %d failed, retry again\n", size);
-		printk("ktap kmalloc size %d failed, retry again\n", size);
-		dump_stack();
-		while (1) {
-			addr = kmalloc(size, KTAP_ALLOC_FLAGS);
-			if (addr)
-				break;
-		}
-		kp_printf(ks, "kmalloc retry success after failed, exit\n");
-	}
-
-	return addr;
-}
-
-void kp_free(ktap_state *ks, void *addr)
-{
-	kfree(addr);
-}
-
-void *kp_reallocv(ktap_state *ks, void *addr, int oldsize, int newsize)
-{
-	void *new_addr;
-
-	new_addr = krealloc(addr, newsize, KTAP_ALLOC_FLAGS);
-	if (unlikely(!new_addr)) {
-		kp_error(ks, "krealloc size %d failed, retry again\n", newsize);
-		printk("ktap krealloc size %d failed, retry again\n", newsize);
-		dump_stack();
-		while (1) {
-			new_addr = krealloc(addr, newsize, KTAP_ALLOC_FLAGS);
-			if (new_addr)
-				break;
-		}
-		kp_printf(ks, "krealloc retry success after failed, exit\n");
-	}
-
-	return new_addr;
-}
-
-void *kp_zalloc(ktap_state *ks, int size)
-{
-	void *addr;
-
-	addr = kzalloc(size, KTAP_ALLOC_FLAGS);
-	if (unlikely(!addr)) {
-		kp_error(ks, "kzalloc size %d failed, retry again\n", size);
-		printk("ktap kzalloc size %d failed, retry again\n", size);
-		dump_stack();
-		while (1) {
-			addr = kzalloc(size, KTAP_ALLOC_FLAGS);
-			if (addr)
-				break;
-		}
-		kp_printf(ks, "kzalloc retry success after failed, exit\n");
-	}
-
-	return addr;
-}
-#endif
-
-void kp_obj_dump(ktap_state *ks, const ktap_value *v)
-{
-	switch (ttype(v)) {
-	case KTAP_TNIL:
-		kp_puts(ks, "NIL");
-		break;
-	case KTAP_TNUMBER:
-		kp_printf(ks, "NUMBER %ld", nvalue(v));
-		break;
-	case KTAP_TBOOLEAN:
-		kp_printf(ks, "BOOLEAN %d", bvalue(v));
-		break;
-	case KTAP_TLIGHTUSERDATA:
-		kp_printf(ks, "LIGHTUSERDATA 0x%lx", (unsigned long)pvalue(v));
-		break;
-	case KTAP_TLCF:
-		kp_printf(ks, "LIGHTCFCUNTION 0x%lx", (unsigned long)fvalue(v));
-		break;
-	case KTAP_TSHRSTR:
-	case KTAP_TLNGSTR:
-		kp_printf(ks, "SHRSTR #%s", svalue(v));
-		break;
-	case KTAP_TUSERDATA:
-		kp_printf(ks, "USERDATA 0x%lx", (unsigned long)uvalue(v));
-		break;
-	case KTAP_TTABLE:
-		kp_printf(ks, "TABLE 0x%lx", (unsigned long)hvalue(v));
-		break;
-        default:
-		kp_printf(ks, "GCVALUE 0x%lx", (unsigned long)gcvalue(v));
-		break;
-	}
-}
-
-#ifdef __KERNEL__
-#include <linux/stacktrace.h>
-#include <linux/kallsyms.h>
-
-static void kp_btrace_dump(ktap_state *ks, ktap_btrace *bt)
-{
-	char str[KSYM_SYMBOL_LEN];
-	int i;
-
-	for (i = 0; i < bt->nr_entries; i++) {
-		unsigned long p = bt->entries[i];
-
-		if (p == ULONG_MAX)
-			break;
-
-		SPRINT_SYMBOL(str, p);
-		kp_printf(ks, "%s\n", str);
-	}
-}
-
-static int kp_btrace_equal(ktap_btrace *bt1, ktap_btrace *bt2)
-{
-	int i;
-
-	if (bt1->nr_entries != bt2->nr_entries)
-		return 0;
-
-	for (i = 0; i < bt1->nr_entries; i++) {
-		if (bt1->entries[i] != bt2->entries[i])
-			return 0;
-	}
-
-	return 1;
-}
-#endif
-
-void kp_showobj(ktap_state *ks, const ktap_value *v)
-{
-	switch (ttype(v)) {
-	case KTAP_TNIL:
-		kp_puts(ks, "nil");
-		break;
-	case KTAP_TNUMBER:
-		kp_printf(ks, "%ld", nvalue(v));
-		break;
-	case KTAP_TBOOLEAN:
-		kp_puts(ks, (bvalue(v) == 1) ? "true" : "false");
-		break;
-	case KTAP_TLIGHTUSERDATA:
-		kp_printf(ks, "0x%lx", (unsigned long)pvalue(v));
-		break;
-	case KTAP_TLCF:
-		kp_printf(ks, "0x%lx", (unsigned long)fvalue(v));
-		break;
-	case KTAP_TSHRSTR:
-	case KTAP_TLNGSTR:
-		kp_puts(ks, svalue(v));
-		break;
-	case KTAP_TUSERDATA:
-		kp_printf(ks, "0x%lx", (unsigned long)uvalue(v));
-		break;
-	case KTAP_TTABLE:
-		kp_table_dump(ks, hvalue(v));
-		break;
-#ifdef __KERNEL__
-	case KTAP_TEVENT:
-		kp_transport_event_write(ks, evalue(v));
-		break;
-	case KTAP_TBTRACE:
-		kp_btrace_dump(ks, btvalue(v));
-		break;
-	case KTAP_TAGGRTABLE:
-		kp_aggrtable_dump(ks, ahvalue(v));
-		break;
-	case KTAP_TAGGRACCVAL:
-		kp_aggraccval_dump(ks, aggraccvalue(v));
-		break;
-#endif
-        default:
-		kp_error(ks, "print unknown value type: %d\n", ttype(v));
-		break;
-	}
-}
-
-
-/*
- * equality of ktap values. ks == NULL means raw equality
- */
-int kp_equalobjv(ktap_state *ks, const ktap_value *t1, const ktap_value *t2)
-{
-	switch (ttype(t1)) {
-	case KTAP_TNIL:
-		return 1;
-	case KTAP_TNUMBER:
-		return nvalue(t1) == nvalue(t2);
-	case KTAP_TBOOLEAN:
-		return bvalue(t1) == bvalue(t2);  /* true must be 1 !! */
-	case KTAP_TLIGHTUSERDATA:
-		return pvalue(t1) == pvalue(t2);
-	case KTAP_TLCF:
-		return fvalue(t1) == fvalue(t2);
-	case KTAP_TSHRSTR:
-		return eqshrstr(rawtsvalue(t1), rawtsvalue(t2));
-	case KTAP_TLNGSTR:
-		return kp_tstring_eqlngstr(rawtsvalue(t1), rawtsvalue(t2));
-	case KTAP_TUSERDATA:
-		if (uvalue(t1) == uvalue(t2))
-			return 1;
-		else if (ks == NULL)
-			return 0;
-	case KTAP_TTABLE:
-		if (hvalue(t1) == hvalue(t2))
-			return 1;
-		else if (ks == NULL)
-			return 0;
-#ifdef __KERNEL__
-	case KTAP_TBTRACE:
-		return kp_btrace_equal(btvalue(t1), btvalue(t2));
-#endif
-	default:
-		return gcvalue(t1) == gcvalue(t2);
-	}
-
-	return 0;
-}
-
-/*
- * ktap will not use lua's length operator on table meaning,
- * also # is not for length operator any more in ktap.
- *
- * Quote from lua mannal:
- * 2.5.5 - The Length Operator
- *
- * The length operator is denoted by the unary operator #.
- * The length of a string is its number of bytes(that is,
- * the usual meaning of string length when each character is one byte).
- *
- * The length of a table t is defined to be any integer index n
- * such that t[n] is not nil and t[n+1] is nil; moreover, if t[1] is nil,
- * n can be zero. For a regular array, with non-nil values from 1 to a given n,
- * its length is exactly that n, the index of its last value. If the array has
- * "holes" (that is, nil values between other non-nil values), then #t can be
- * any of the indices that directly precedes a nil value
- * (that is, it may consider any such nil value as the end of the array).
- */
-int kp_objlen(ktap_state *ks, const ktap_value *v)
-{
-	switch(v->type) {
-	case KTAP_TTABLE:
-		return kp_table_length(ks, hvalue(v));
-	case KTAP_TSTRING:
-		return rawtsvalue(v)->tsv.len;
-	default:
-		kp_printf(ks, "cannot get length of type %d\n", v->type);
-		return -1;
-	}
-	return 0;
-}
-
-/* need to protect allgc field? */
-ktap_gcobject *kp_newobject(ktap_state *ks, int type, size_t size,
-			    ktap_gcobject **list)
-{
-	ktap_gcobject *o;
-
-	o = kp_malloc(ks, size);
-	if (list == NULL)
-		list = &G(ks)->allgc;
-
-	gch(o)->tt = type;
-	gch(o)->next = *list;
-	*list = o;
-
-	return o;
-}
-
-ktap_upval *kp_newupval(ktap_state *ks)
-{
-	ktap_upval *uv;
-
-	uv = &kp_newobject(ks, KTAP_TUPVAL, sizeof(ktap_upval), NULL)->uv;
-	uv->v = &uv->u.value;
-	setnilvalue(uv->v);
-	return uv;
-}
-
-static ktap_btrace *kp_newbacktrace(ktap_state *ks, ktap_gcobject **list)
-{
-	ktap_btrace *bt;
-
-	bt = &kp_newobject(ks, KTAP_TBTRACE, sizeof(ktap_btrace), list)->bt;
-	return bt;
-}
-
-void kp_objclone(ktap_state *ks, const ktap_value *o, ktap_value *newo,
-		 ktap_gcobject **list)
-{
-	if (ttisbtrace(o)) {
-		ktap_btrace *bt;
-		bt = kp_newbacktrace(ks, list);
-		bt->nr_entries = btvalue(o)->nr_entries;
-		memcpy(&bt->entries[0], &btvalue(o)->entries[0],
-					sizeof(bt->entries));
-		setbtvalue(newo, bt);
-	} else {
-		kp_error(ks, "cannot clone ktap value type %d\n", ttype(o));
-		setnilvalue(newo);
-	}
-}
-
-ktap_closure *kp_newlclosure(ktap_state *ks, int n)
-{
-	ktap_closure *cl;
-
-	cl = (ktap_closure *)kp_newobject(ks, KTAP_TLCL, sizeof(*cl), NULL);
-	cl->l.p = NULL;
-	cl->l.nupvalues = n;
-	while (n--)
-		cl->l.upvals[n] = NULL;
-
-	return cl;
-}
-
-static void free_proto(ktap_state *ks, ktap_proto *f)
-{
-	kp_free(ks, f->code);
-	kp_free(ks, f->p);
-	kp_free(ks, f->k);
-	kp_free(ks, f->lineinfo);
-	kp_free(ks, f->locvars);
-	kp_free(ks, f->upvalues);
-	kp_free(ks, f);
-}
-
-ktap_proto *kp_newproto(ktap_state *ks)
-{
-	ktap_proto *f;
-	f = (ktap_proto *)kp_newobject(ks, KTAP_TPROTO, sizeof(*f), NULL);
-	f->k = NULL;
- 	f->sizek = 0;
-	f->p = NULL;
-	f->sizep = 0;
-	f->code = NULL;
-	f->cache = NULL;
-	f->sizecode = 0;
-	f->lineinfo = NULL;
-	f->sizelineinfo = 0;
-	f->upvalues = NULL;
-	f->sizeupvalues = 0;
-	f->numparams = 0;
-	f->is_vararg = 0;
-	f->maxstacksize = 0;
-	f->locvars = NULL;
-	f->sizelocvars = 0;
-	f->linedefined = 0;
-	f->lastlinedefined = 0;
-	f->source = NULL;
-	return f;
-}
-
-static ktap_udata *newudata(ktap_state *ks, size_t s)
-{
-	ktap_udata *u;
-
-	u = &kp_newobject(ks, KTAP_TUSERDATA, sizeof(ktap_udata) + s, NULL)->u;
-	u->uv.len = s;
-	return u;
-}
-
-void *kp_newuserdata(ktap_state *ks, size_t size)
-{
-	ktap_udata *u;
-
-	u = newudata(ks, size);
-	return u + 1;
-}
-
-void kp_free_gclist(ktap_state *ks, ktap_gcobject *o)
-{
-	while (o) {
-		ktap_gcobject *next;
-
-		next = gch(o)->next;
-		switch (gch(o)->tt) {
-		case KTAP_TTABLE:
-			kp_table_free(ks, (ktap_table *)o);
-			break;
-		case KTAP_TPROTO:
-			free_proto(ks, (ktap_proto *)o);
-			break;
-#ifdef __KERNEL__
-		case KTAP_TAGGRTABLE:
-			kp_aggrtable_free(ks, (ktap_aggrtable *)o);
-			break;
-#endif
-		default:
-			kp_free(ks, o);
-		}
-		o = next;
-	}
-}
-
-void kp_free_all_gcobject(ktap_state *ks)
-{
-	kp_free_gclist(ks, G(ks)->allgc);
-	G(ks)->allgc = NULL;
-}
-
-/******************************************************************************/
-
-/*
- * make header for precompiled chunks
- * if you change the code below be sure to update load_header and FORMAT above
- * and KTAPC_HEADERSIZE in ktap_types.h
- */
-void kp_header(u8 *h)
-{
-	int x = 1;
-
-	memcpy(h, KTAP_SIGNATURE, sizeof(KTAP_SIGNATURE) - sizeof(char));
-	h += sizeof(KTAP_SIGNATURE) - sizeof(char);
-	*h++ = (u8)VERSION;
-	*h++ = (u8)FORMAT;
-	*h++ = (u8)(*(char*)&x);                    /* endianness */
-	*h++ = (u8)(sizeof(int));
-	*h++ = (u8)(sizeof(size_t));
-	*h++ = (u8)(sizeof(ktap_instruction));
-	*h++ = (u8)(sizeof(ktap_number));
-	*h++ = (u8)(((ktap_number)0.5) == 0); /* is ktap_number integral? */
-	memcpy(h, KTAPC_TAIL, sizeof(KTAPC_TAIL) - sizeof(char));
-}
-
-
diff --git a/drivers/staging/ktap/interpreter/opcode.c b/drivers/staging/ktap/interpreter/opcode.c
deleted file mode 100644
index 2f44855..0000000
--- a/drivers/staging/ktap/interpreter/opcode.c
+++ /dev/null
@@ -1,127 +0,0 @@
-/*
- * opcode.c
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "../include/ktap_types.h"
-#include "../include/ktap_opcodes.h"
-
-const char *const ktap_opnames[NUM_OPCODES + 1] = {
-  "MOVE",
-  "LOADK",
-  "LOADKX",
-  "LOADBOOL",
-  "LOADNIL",
-  "GETUPVAL",
-  "GETTABUP",
-  "GETTABLE",
-  "SETTABUP",
-  "SETTABUP_INCR",
-  "SETUPVAL",
-  "SETTABLE",
-  "SETTABLE_INCR",
-  "NEWTABLE",
-  "SELF",
-  "ADD",
-  "SUB",
-  "MUL",
-  "DIV",
-  "MOD",
-  "POW",
-  "UNM",
-  "NOT",
-  "LEN",
-  "CONCAT",
-  "JMP",
-  "EQ",
-  "LT",
-  "LE",
-  "TEST",
-  "TESTSET",
-  "CALL",
-  "TAILCALL",
-  "RETURN",
-  "FORLOOP",
-  "FORPREP",
-  "TFORCALL",
-  "TFORLOOP",
-  "SETLIST",
-  "CLOSURE",
-  "VARARG",
-  "EXTRAARG",
-
-  "EVENT",
-  "EVENT_NAME",
-  "EVENT_ARG", /* arg1, arg2 .. arg9 */
-  NULL
-};
-
-
-#define opmode(t,a,b,c,m) (((t)<<7) | ((a)<<6) | ((b)<<4) | ((c)<<2) | (m))
-
-const u8 ktap_opmodes[NUM_OPCODES] = {
-/*       T  A    B       C     mode                opcode       */
-  opmode(0, 1, OpArgR, OpArgN, iABC)            /* OP_MOVE */
- ,opmode(0, 1, OpArgK, OpArgN, iABx)            /* OP_LOADK */
- ,opmode(0, 1, OpArgN, OpArgN, iABx)            /* OP_LOADKX */
- ,opmode(0, 1, OpArgU, OpArgU, iABC)            /* OP_LOADBOOL */
- ,opmode(0, 1, OpArgU, OpArgN, iABC)            /* OP_LOADNIL */
- ,opmode(0, 1, OpArgU, OpArgN, iABC)            /* OP_GETUPVAL */
- ,opmode(0, 1, OpArgU, OpArgK, iABC)            /* OP_GETTABUP */
- ,opmode(0, 1, OpArgR, OpArgK, iABC)            /* OP_GETTABLE */
- ,opmode(0, 0, OpArgK, OpArgK, iABC)            /* OP_SETTABUP */
- ,opmode(0, 0, OpArgU, OpArgN, iABC)            /* OP_SETUPVAL */
- ,opmode(0, 0, OpArgK, OpArgK, iABC)            /* OP_SETTABLE */
- ,opmode(0, 1, OpArgU, OpArgU, iABC)            /* OP_NEWTABLE */
- ,opmode(0, 1, OpArgR, OpArgK, iABC)            /* OP_SELF */
- ,opmode(0, 1, OpArgK, OpArgK, iABC)            /* OP_ADD */
- ,opmode(0, 1, OpArgK, OpArgK, iABC)            /* OP_SUB */
- ,opmode(0, 1, OpArgK, OpArgK, iABC)            /* OP_MUL */
- ,opmode(0, 1, OpArgK, OpArgK, iABC)            /* OP_DIV */
- ,opmode(0, 1, OpArgK, OpArgK, iABC)            /* OP_MOD */
- ,opmode(0, 1, OpArgK, OpArgK, iABC)            /* OP_POW */
- ,opmode(0, 1, OpArgR, OpArgN, iABC)            /* OP_UNM */
- ,opmode(0, 1, OpArgR, OpArgN, iABC)            /* OP_NOT */
- ,opmode(0, 1, OpArgR, OpArgN, iABC)            /* OP_LEN */
- ,opmode(0, 1, OpArgR, OpArgR, iABC)            /* OP_CONCAT */
- ,opmode(0, 0, OpArgR, OpArgN, iAsBx)           /* OP_JMP */
- ,opmode(1, 0, OpArgK, OpArgK, iABC)            /* OP_EQ */
- ,opmode(1, 0, OpArgK, OpArgK, iABC)            /* OP_LT */
- ,opmode(1, 0, OpArgK, OpArgK, iABC)            /* OP_LE */
- ,opmode(1, 0, OpArgN, OpArgU, iABC)            /* OP_TEST */
- ,opmode(1, 1, OpArgR, OpArgU, iABC)            /* OP_TESTSET */
- ,opmode(0, 1, OpArgU, OpArgU, iABC)            /* OP_CALL */
- ,opmode(0, 1, OpArgU, OpArgU, iABC)            /* OP_TAILCALL */
- ,opmode(0, 0, OpArgU, OpArgN, iABC)            /* OP_RETURN */
- ,opmode(0, 1, OpArgR, OpArgN, iAsBx)           /* OP_FORLOOP */
- ,opmode(0, 1, OpArgR, OpArgN, iAsBx)           /* OP_FORPREP */
- ,opmode(0, 0, OpArgN, OpArgU, iABC)            /* OP_TFORCALL */
- ,opmode(0, 1, OpArgR, OpArgN, iAsBx)           /* OP_TFORLOOP */
- ,opmode(0, 0, OpArgU, OpArgU, iABC)            /* OP_SETLIST */
- ,opmode(0, 1, OpArgU, OpArgN, iABx)            /* OP_CLOSURE */
- ,opmode(0, 1, OpArgU, OpArgN, iABC)            /* OP_VARARG */
- ,opmode(0, 0, OpArgU, OpArgU, iAx)             /* OP_EXTRAARG */
- ,opmode(0, 1, OpArgR, OpArgK, iABC)            /* OP_EVENT */
-};
-
-
diff --git a/drivers/staging/ktap/interpreter/strfmt.c b/drivers/staging/ktap/interpreter/strfmt.c
deleted file mode 100644
index 2c1e761..0000000
--- a/drivers/staging/ktap/interpreter/strfmt.c
+++ /dev/null
@@ -1,196 +0,0 @@
-/*
- * strfmt.c - printf implementation
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/ctype.h>
-#include <linux/kallsyms.h>
-#include "../include/ktap.h"
-
-/* macro to `unsign' a character */
-#define uchar(c)	((unsigned char)(c))
-
-#define L_ESC		'%'
-
-/* valid flags in a format specification */
-#define FLAGS	"-+ #0"
-
-#define INTFRMLEN	"ll"
-#define INTFRM_T	long long
-
-/*
- * maximum size of each format specification (such as '%-099.99d')
- * (+10 accounts for %99.99x plus margin of error)
- */
-#define MAX_FORMAT	(sizeof(FLAGS) + sizeof(INTFRMLEN) + 10)
-
-static const char *scanformat(ktap_state *ks, const char *strfrmt, char *form)
-{
-	const char *p = strfrmt;
-	while (*p != '\0' && strchr(FLAGS, *p) != NULL)
-		p++;  /* skip flags */
-
-	if ((size_t)(p - strfrmt) >= sizeof(FLAGS)/sizeof(char)) {
-		kp_error(ks, "invalid format (repeated flags)\n");
-		return NULL;
-	}
-
-	if (isdigit(uchar(*p)))
-		p++;  /* skip width */
-
-	if (isdigit(uchar(*p)))
-		p++;  /* (2 digits at most) */
-
-	if (*p == '.') {
-		p++;
-		if (isdigit(uchar(*p)))
-			p++;  /* skip precision */
-		if (isdigit(uchar(*p)))
-			p++;  /* (2 digits at most) */
-	}
-
-	if (isdigit(uchar(*p))) {
-		kp_error(ks, "invalid format (width or precision too long)\n");
-		return NULL;
-	}
-
-	*(form++) = '%';
-	memcpy(form, strfrmt, (p - strfrmt + 1) * sizeof(char));
-	form += p - strfrmt + 1;
-	*form = '\0';
-	return p;
-}
-
-
-/*
- * add length modifier into formats
- */
-static void addlenmod(char *form, const char *lenmod)
-{
-	size_t l = strlen(form);
-	size_t lm = strlen(lenmod);
-	char spec = form[l - 1];
-
-	strcpy(form + l - 1, lenmod);
-	form[l + lm - 1] = spec;
-	form[l + lm] = '\0';
-}
-
-
-static void ktap_argerror(ktap_state *ks, int narg, const char *extramsg)
-{
-	kp_error(ks, "bad argument #%d: (%s)\n", narg, extramsg);
-}
-
-int kp_strfmt(ktap_state *ks, struct trace_seq *seq)
-{
-	int arg = 1;
-	size_t sfl;
-	ktap_value *arg_fmt = kp_arg(ks, 1);
-	int argnum = kp_arg_nr(ks);
-	const char *strfrmt, *strfrmt_end;
-
-	strfrmt = svalue(arg_fmt);
-	sfl = rawtsvalue(arg_fmt)->tsv.len;
-	strfrmt_end = strfrmt + sfl;
-
-	while (strfrmt < strfrmt_end) {
-		if (*strfrmt != L_ESC)
-			trace_seq_putc(seq, *strfrmt++);
-		else if (*++strfrmt == L_ESC)
-			trace_seq_putc(seq, *strfrmt++);
-		else { /* format item */
-			char form[MAX_FORMAT];
-
-			if (++arg > argnum) {
-				ktap_argerror(ks, arg, "no value");
-				return -1;
-			}
-
-			strfrmt = scanformat(ks, strfrmt, form);
-			switch (*strfrmt++) {
-			case 'c':
-				trace_seq_printf(seq, form,
-						 nvalue(kp_arg(ks, arg)));
-				break;
-			case 'd':  case 'i': {
-				ktap_number n = nvalue(kp_arg(ks, arg));
-				INTFRM_T ni = (INTFRM_T)n;
-				addlenmod(form, INTFRMLEN);
-				trace_seq_printf(seq, form, ni);
-				break;
-			}
-			case 'p': {
-				char str[KSYM_SYMBOL_LEN];
-				SPRINT_SYMBOL(str, nvalue(kp_arg(ks, arg)));
-				trace_seq_puts(seq, str);
-				break;
-			}
-			case 'o':  case 'u':  case 'x':  case 'X': {
-				ktap_number n = nvalue(kp_arg(ks, arg));
-				unsigned INTFRM_T ni = (unsigned INTFRM_T)n;
-				addlenmod(form, INTFRMLEN);
-				trace_seq_printf(seq, form, ni);
-				break;
-			}
-			case 's': {
-				ktap_value *v = kp_arg(ks, arg);
-				const char *s;
-				size_t l;
-
-				if (isnil(v)) {
-					trace_seq_puts(seq, "nil");
-					return 0;
-				}
-
-				if (ttisevent(v)) {
-					kp_event_tostring(ks, seq);
-					return 0;
-				}
-
-				s = svalue(v);
-				l = rawtsvalue(v)->tsv.len;
-				if (!strchr(form, '.') && l >= 100) {
-					/*
-					 * no precision and string is too long
-					 * to be formatted;
-					 * keep original string
-					 */
-					trace_seq_puts(seq, s);
-					break;
-				} else {
-					trace_seq_printf(seq, form, s);
-					break;
-				}
-			}
-			default: /* also treat cases `pnLlh' */
-				kp_error(ks, "invalid option " KTAP_QL("%%%c")
-					     " to " KTAP_QL("format"),
-					     *(strfrmt - 1));
-			}
-		}
-	}
-
-	return 0;
-}
-
diff --git a/drivers/staging/ktap/interpreter/table.c b/drivers/staging/ktap/interpreter/table.c
deleted file mode 100644
index 4e83947..0000000
--- a/drivers/staging/ktap/interpreter/table.c
+++ /dev/null
@@ -1,1292 +0,0 @@
-/*
- * table.c - ktap table data structure manipulation function
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifdef __KERNEL__
-#include "../include/ktap.h"
-#include <linux/spinlock.h>
-#include <linux/kallsyms.h>
-#include <linux/sort.h>
-#else
-#include "../include/ktap_types.h"
-
-static inline void sort(void *base, size_t num, size_t size,
-			int (*cmp_func)(const void *, const void *),
-			void (*swap_func)(void *, void *, int size))
-{}
-#endif
-
-
-#ifdef __KERNEL__
-#define kp_table_lock_init(t)	\
-	do {	\
-		t->lock = (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;	\
-	} while (0)
-#define kp_table_lock(t)	\
-	do {	\
-		local_irq_save(flags);	\
-		arch_spin_lock(&t->lock);	\
-	} while (0)
-#define kp_table_unlock(t)	\
-	do {	\
-		arch_spin_unlock(&t->lock);	\
-		local_irq_restore(flags);	\
-	} while (0)
-
-#else
-#define kp_table_lock_init(t)
-#define kp_table_lock(t)
-#define kp_table_unlock(t)
-#endif
-
-#define MAXBITS         30
-#define MAXASIZE        (1 << MAXBITS)
-
-
-#define NILCONSTANT     {NULL}, KTAP_TNIL
-const struct ktap_value ktap_nilobjectv = {NILCONSTANT};
-#define ktap_nilobject	(&ktap_nilobjectv)
-
-static const ktap_tnode dummynode_ = {
-	{NILCONSTANT}, /* value */
-	{{NILCONSTANT, NULL}}, /* key */
-};
-
-#define gnode(t,i)      (&(t)->node[i])
-#define gkey(n)         (&(n)->i_key.tvk)
-#define gval(n)         (&(n)->i_val)
-#define gnext(n)        ((n)->i_key.nk.next)
-
-#define twoto(x)        (1<<(x))
-#define sizenode(t)	(twoto((t)->lsizenode))
-
-#define hashpow2(t,n)           (gnode(t, lmod((n), sizenode(t))))
-
-#define hashmod(t,n)		(gnode(t, ((n) % ((sizenode(t)-1)|1))))
-
-#define hashstr(t,str)          hashpow2(t, (str)->tsv.hash)
-#define hashboolean(t,p)        hashpow2(t, p)
-#define hashnum(t, n)		hashmod(t, (unsigned int)n)
-#define hashpointer(t,p)	hashmod(t, (unsigned long)(p))
-
-#define dummynode	(&dummynode_)
-#define isdummy(n)	((n) == dummynode)
-
-static void table_setint(ktap_state *ks, ktap_table *t, int key, ktap_value *v);
-static ktap_value *table_set(ktap_state *ks, ktap_table *t,
-			     const ktap_value *key);
-static void setnodevector(ktap_state *ks, ktap_table *t, int size);
-
-static int ceillog2(unsigned int x)
-{
-	static const u8 log_2[256] = {
-	0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
-	6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
-	7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
-	7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
-	8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-	8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-	8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-	8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
-	};
-
-	int l = 0;
-
-	x--;
-	while (x >= 256) { l += 8; x >>= 8; }
-	return l + log_2[x];
-}
-
-
-ktap_table *kp_table_new(ktap_state *ks)
-{
-	ktap_table *t = &kp_newobject(ks, KTAP_TTABLE, sizeof(ktap_table),
-				      NULL)->h;
-	t->flags = (u8)(~0);
-	t->array = NULL;
-	t->sizearray = 0;
-	t->node = (ktap_tnode *)dummynode;
-	t->gclist = NULL;
-	setnodevector(ks, t, 0);
-
-	kp_table_lock_init(t);
-	return t;
-}
-
-static const ktap_value *table_getint(ktap_table *t, int key)
-{
-	ktap_tnode *n;
-
-	if ((unsigned int)(key - 1) < (unsigned int)t->sizearray)
-		return &t->array[key - 1];
-
-	n = hashnum(t, key);
-	do {
-		if (ttisnumber(gkey(n)) && nvalue(gkey(n)) == key)
-			return gval(n);
-		else
-			n = gnext(n);
-	} while (n);
-
-	return ktap_nilobject;
-}
-
-const ktap_value *kp_table_getint(ktap_table *t, int key)
-{
-	const ktap_value *val;
-	unsigned long __maybe_unused flags;
-
-	kp_table_lock(t);
-	val = table_getint(t, key);
-	kp_table_unlock(t);
-
-	return val;
-}
-
-static ktap_tnode *mainposition (const ktap_table *t, const ktap_value *key)
-{
-	switch (ttype(key)) {
-	case KTAP_TNUMBER:
-		return hashnum(t, nvalue(key));
-	case KTAP_TLNGSTR: {
-		ktap_string *s = rawtsvalue(key);
-		if (s->tsv.extra == 0) {  /* no hash? */
-			s->tsv.hash = kp_string_hash(getstr(s), s->tsv.len,
-						     s->tsv.hash);
-			s->tsv.extra = 1;  /* now it has its hash */
-		}
-		return hashstr(t, rawtsvalue(key));
-		}
-	case KTAP_TSHRSTR:
-		return hashstr(t, rawtsvalue(key));
-	case KTAP_TBOOLEAN:
-		return hashboolean(t, bvalue(key));
-	case KTAP_TLIGHTUSERDATA:
-		return hashpointer(t, pvalue(key));
-	case KTAP_TLCF:
-		return hashpointer(t, fvalue(key));
-	case KTAP_TBTRACE:
-		/* use first entry as hash key, cannot use gcvalue as key */
-		return hashpointer(t, btvalue(key)->entries[0]);
-	default:
-		return hashpointer(t, gcvalue(key));
-	}
-}
-
-static int arrayindex(const ktap_value *key)
-{
-	if (ttisnumber(key)) {
-		ktap_number n = nvalue(key);
-		int k = (int)n;
-		if ((ktap_number)k == n)
-			return k;
-	}
-
-	/* `key' did not match some condition */
-	return -1;
-}
-
-/*
- * returns the index of a `key' for table traversals. First goes all
- * elements in the array part, then elements in the hash part. The
- * beginning of a traversal is signaled by -1.
- */
-static int findindex(ktap_state *ks, ktap_table *t, StkId key)
-{
-	int i;
-
-	if (ttisnil(key))
-		return -1;  /* first iteration */
-
-	i = arrayindex(key);
-	if (i > 0 && i <= t->sizearray)  /* is `key' inside array part? */
-		return i - 1;  /* yes; that's the index (corrected to C) */
-	else {
-		ktap_tnode *n = mainposition(t, key);
-		for (;;) {  /* check whether `key' is somewhere in the chain */
-			/* key may be dead already, but it is ok to use it in `next' */
-			if (kp_equalobjv(ks, gkey(n), key)) {
-				i = n - gnode(t, 0);  /* key index in hash table */
-				/* hash elements are numbered after array ones */
-				return i + t->sizearray;
-			} else
-				n = gnext(n);
-
-			if (n == NULL)
-				/* key not found */
-				kp_error(ks, "invalid table key to next");
-		}
-	}
-}
-
-int kp_table_next(ktap_state *ks, ktap_table *t, StkId key)
-{
-	unsigned long __maybe_unused flags;
-	int i;
-
-	kp_table_lock(t);
-
-	i = findindex(ks, t, key);  /* find original element */
-
-	for (i++; i < t->sizearray; i++) {  /* try first array part */
-	        if (!ttisnil(&t->array[i])) {  /* a non-nil value? */
-			setnvalue(key, i+1);
-			setobj(key+1, &t->array[i]);
-			kp_table_unlock(t);
-			return 1;
-		}
-	}
-
-	for (i -= t->sizearray; i < sizenode(t); i++) {  /* then hash part */
-		if (!ttisnil(gval(gnode(t, i)))) {  /* a non-nil value? */
-			setobj(key, gkey(gnode(t, i)));
-			setobj(key+1, gval(gnode(t, i)));
-			kp_table_unlock(t);
-			return 1;
-		}
-	}
-
-	kp_table_unlock(t);
-	return 0;  /* no more elements */
-}
-
-
-
-static int computesizes (int nums[], int *narray)
-{
-	int i;
-	int twotoi;  /* 2^i */
-	int a = 0;  /* number of elements smaller than 2^i */
-	int na = 0;  /* number of elements to go to array part */
-	int n = 0;  /* optimal size for array part */
-
-	for (i = 0, twotoi = 1; twotoi/2 < *narray; i++, twotoi *= 2) {
-		if (nums[i] > 0) {
-			a += nums[i];
-			/* more than half elements present? */
-			if (a > twotoi/2) {
-				/* optimal size (till now) */
-				n = twotoi;
-				/* 
-				 * all elements smaller than n will go to
-				 * array part
-				 */
-				na = a;
-			}
-		}
-		if (a == *narray)
-			break;  /* all elements already counted */
-	}
-	*narray = n;
-	return na;
-}
-
-
-static int countint(const ktap_value *key, int *nums)
-{
-	int k = arrayindex(key);
-
-	/* is `key' an appropriate array index? */
-	if (0 < k && k <= MAXASIZE) {
-		nums[ceillog2(k)]++;  /* count as such */
-		return 1;
-	} else
-		return 0;
-}
-
-
-static int numusearray(const ktap_table *t, int *nums)
-{
-	int lg;
-	int ttlg;  /* 2^lg */
-	int ause = 0;  /* summation of `nums' */
-	int i = 1;  /* count to traverse all array keys */
-
-	/* for each slice */
-	for (lg=0, ttlg=1; lg <= MAXBITS; lg++, ttlg *= 2) {
-		int lc = 0;  /* counter */
-		int lim = ttlg;
-
-		if (lim > t->sizearray) {
-			lim = t->sizearray;  /* adjust upper limit */
-			if (i > lim)
-				break;  /* no more elements to count */
-		}
-
-		/* count elements in range (2^(lg-1), 2^lg] */
-		for (; i <= lim; i++) {
-			if (!ttisnil(&t->array[i-1]))
-				lc++;
-		}
-		nums[lg] += lc;
-		ause += lc;
-	}
-	return ause;
-}
-
-static int numusehash(const ktap_table *t, int *nums, int *pnasize)
-{
-	int totaluse = 0;  /* total number of elements */
-	int ause = 0;  /* summation of `nums' */
-	int i = sizenode(t);
-
-	while (i--) {
-		ktap_tnode *n = &t->node[i];
-		if (!isnil(gval(n))) {
-			ause += countint(gkey(n), nums);
-			totaluse++;
-		}
-	}
-
-	*pnasize += ause;
-	return totaluse;
-}
-
-
-static void setarrayvector(ktap_state *ks, ktap_table *t, int size)
-{
-	int i;
-
-	kp_realloc(ks, t->array, t->sizearray, size, ktap_value);
-	for (i = t->sizearray; i < size; i++)
-		setnilvalue(&t->array[i]);
-
-	t->sizearray = size;
-}
-
-static void setnodevector(ktap_state *ks, ktap_table *t, int size)
-{
-	int lsize;
-
-	if (size == 0) {  /* no elements to hash part? */
-		t->node = (ktap_tnode *)dummynode;  /* use common `dummynode' */
-		lsize = 0;
-	} else {
-		int i;
-		lsize = ceillog2(size);
-		if (lsize > MAXBITS) {
-			kp_error(ks, "table overflow\n");
-			return;
-		}
-
-		size = twoto(lsize);
-		t->node = kp_malloc(ks, size * sizeof(ktap_tnode));
-		for (i = 0; i < size; i++) {
-			ktap_tnode *n = gnode(t, i);
-			gnext(n) = NULL;
-			setnilvalue(gkey(n));
-			setnilvalue(gval(n));
-		}
-	}
-
-	t->lsizenode = (u8)lsize;
-	t->lastfree = gnode(t, size);  /* all positions are free */
-}
-
-static void table_resize(ktap_state *ks, ktap_table *t, int nasize, int nhsize)
-{
-	int i;
-	int oldasize = t->sizearray;
-	int oldhsize = t->lsizenode;
-	ktap_tnode *nold = t->node;  /* save old hash ... */
-
-#ifdef __KERNEL__
-	kp_verbose_printf(ks, "table resize, nasize: %d, nhsize: %d\n",
-				nasize, nhsize);
-#endif
-
-	if (nasize > oldasize)  /* array part must grow? */
-		setarrayvector(ks, t, nasize);
-
-	/* create new hash part with appropriate size */
-	setnodevector(ks, t, nhsize);
-
-	if (nasize < oldasize) {  /* array part must shrink? */
-		t->sizearray = nasize;
-		/* re-insert elements from vanishing slice */
-		for (i=nasize; i<oldasize; i++) {
-			if (!ttisnil(&t->array[i]))
-				table_setint(ks, t, i + 1, &t->array[i]);
-		}
-
-		/* shrink array */
-		kp_realloc(ks, t->array, oldasize, nasize, ktap_value);
-	}
-
-	/* re-insert elements from hash part */
-	for (i = twoto(oldhsize) - 1; i >= 0; i--) {
-		ktap_tnode *old = nold+i;
-		if (!ttisnil(gval(old))) {
-			/*
-			 * doesn't need barrier/invalidate cache, as entry was
-			 * already present in the table
-			 */
-			setobj(table_set(ks, t, gkey(old)), gval(old));
-		}
-	}
-
-	if (!isdummy(nold))
-		kp_free(ks, nold); /* free old array */
-}
-
-void kp_table_resize(ktap_state *ks, ktap_table *t, int nasize, int nhsize)
-{
-	unsigned long __maybe_unused flags;
-
-	kp_table_lock(t);
-	table_resize(ks, t, nasize, nhsize);
-	kp_table_unlock(t);
-}
-
-void kp_table_resizearray(ktap_state *ks, ktap_table *t, int nasize)
-{
-	unsigned long __maybe_unused flags;
-	int nsize;
-
-	kp_table_lock(t);
-
-	nsize = isdummy(t->node) ? 0 : sizenode(t);
-	table_resize(ks, t, nasize, nsize);
-
-	kp_table_unlock(t);
-}
-
-static void rehash(ktap_state *ks, ktap_table *t, const ktap_value *ek)
-{
-	int nasize, na;
-	/* nums[i] = number of keys with 2^(i-1) < k <= 2^i */
-	int nums[MAXBITS+1];
-	int i;
-	int totaluse;
-
-	for (i = 0; i <= MAXBITS; i++)
-		nums[i] = 0;  /* reset counts */
-
-	nasize = numusearray(t, nums);  /* count keys in array part */
-	totaluse = nasize;  /* all those keys are integer keys */
-	totaluse += numusehash(t, nums, &nasize);  /* count keys in hash part */
-	/* count extra key */
-	nasize += countint(ek, nums);
-	totaluse++;
-	/* compute new size for array part */
-	na = computesizes(nums, &nasize);
-	/* resize the table to new computed sizes */
-	table_resize(ks, t, nasize, totaluse - na);
-}
-
-
-static ktap_tnode *getfreepos(ktap_table *t)
-{
-	while (t->lastfree > t->node) {
-		t->lastfree--;
-		if (isnil(gkey(t->lastfree)))
-			return t->lastfree;
-	}
-	return NULL;  /* could not find a free place */
-}
-
-
-static ktap_value *table_newkey(ktap_state *ks, ktap_table *t,
-				const ktap_value *key)
-{
-	ktap_tnode *mp;
-	ktap_value newkey;
-
-	mp = mainposition(t, key);
-	if (!isnil(gval(mp)) || isdummy(mp)) {  /* main position is taken? */
-		ktap_tnode *othern;
-		ktap_tnode *n = getfreepos(t);  /* get a free place */
-		if (n == NULL) {  /* cannot find a free place? */
-			rehash(ks, t, key);  /* grow table */
-			/* whatever called 'newkey' take care of TM cache and GC barrier */
-			return table_set(ks, t, key);  /* insert key into grown table */
-		}
-
-		othern = mainposition(t, gkey(mp));
-		if (othern != mp) {  /* is colliding node out of its main position? */
-			/* yes; move colliding node into free position */
-			while (gnext(othern) != mp)
-				othern = gnext(othern);  /* find previous */
-			gnext(othern) = n;  /* redo the chain with `n' in place of `mp' */
-			*n = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
-			gnext(mp) = NULL;  /* now `mp' is free */
-			setnilvalue(gval(mp));
-		} else {  /* colliding node is in its own main position */
-			/* new node will go into free position */
-			gnext(n) = gnext(mp);  /* chain new position */
-			gnext(mp) = n;
-			mp = n;
-		}
-	}
-
-	/* special handling for cloneable object, maily for btrace object */
-	if (ttisclone(key))
-		kp_objclone(ks, key, &newkey, &t->gclist);
-	else
-		newkey = *key;
-
-	setobj(gkey(mp), &newkey);
-	return gval(mp);
-}
-
-
-/*
- * search function for short strings
- */
-static const ktap_value *table_getstr(ktap_table *t, ktap_string *key)
-{
-	ktap_tnode *n = hashstr(t, key);
-
-	do {  /* check whether `key' is somewhere in the chain */
-		if (ttisshrstring(gkey(n)) && eqshrstr(rawtsvalue(gkey(n)),
-								key))
-			return gval(n);  /* that's it */
-		else
-			n = gnext(n);
-	} while (n);
-
-	return ktap_nilobject;
-}
-
-
-/*
- * main search function
- */
-static const ktap_value *table_get(ktap_table *t, const ktap_value *key)
-{
-	switch (ttype(key)) {
-	case KTAP_TNIL:
-		return ktap_nilobject;
-	case KTAP_TSHRSTR:
-		return table_getstr(t, rawtsvalue(key));
-	case KTAP_TNUMBER: {
-		ktap_number n = nvalue(key);
-		int k = (int)n;
-		if ((ktap_number)k == nvalue(key)) /* index is int? */
-			return table_getint(t, k);  /* use specialized version */
-		/* else go through */
-	}
-	default: {
-		ktap_tnode *n = mainposition(t, key);
-		do {  /* check whether `key' is somewhere in the chain */
-			if (rawequalobj(gkey(n), key))
-				return gval(n);  /* that's it */
-			else
-				n = gnext(n);
-		} while (n);
-
-		return ktap_nilobject;
-	}
-	}
-}
-
-const ktap_value *kp_table_get(ktap_table *t, const ktap_value *key)
-{
-	const ktap_value *val;
-	unsigned long __maybe_unused flags;
-
-	kp_table_lock(t);
-	val = table_get(t, key);
-	kp_table_unlock(t);
-
-	return val;
-}
-
-static ktap_value *table_set(ktap_state *ks, ktap_table *t,
-			     const ktap_value *key)
-{
-	const ktap_value *p = table_get(t, key);
-
-	if (p != ktap_nilobject)
-		return (ktap_value *)p;
-	else
-		return table_newkey(ks, t, key);
-}
-
-void kp_table_setvalue(ktap_state *ks, ktap_table *t,
-		       const ktap_value *key, ktap_value *val)
-{
-	unsigned long __maybe_unused flags;
-
-	if (isnil(key)) {
-		kp_printf(ks, "table index is nil\n");
-		kp_exit(ks);
-		return;
-	}
-
-	kp_table_lock(t);
-	setobj(table_set(ks, t, key), val);
-	kp_table_unlock(t);
-}
-
-static void table_setint(ktap_state *ks, ktap_table *t, int key, ktap_value *v)
-{
-	const ktap_value *p;
-	ktap_value *cell;
-
-	p = table_getint(t, key);
-
-	if (p != ktap_nilobject)
-		cell = (ktap_value *)p;
-	else {
-		ktap_value k;
-		setnvalue(&k, key);
-		cell = table_newkey(ks, t, &k);
-	}
-
-	setobj(cell, v);
-}
-
-void kp_table_setint(ktap_state *ks, ktap_table *t, int key, ktap_value *val)
-{
-	unsigned long __maybe_unused flags;
-
-	kp_table_lock(t);
-	table_setint(ks, t, key, val);
-	kp_table_unlock(t);
-}
-
-void kp_table_atomic_inc(ktap_state *ks, ktap_table *t, ktap_value *key, int n)
-{
-	unsigned long __maybe_unused flags;
-	ktap_value *v;
-
-	if (isnil(key)) {
-		kp_printf(ks, "table index is nil\n");
-		kp_exit(ks);
-		return;
-	}
-
-	kp_table_lock(t);
-
-	v = table_set(ks, t, key);
-	if (isnil(v)) {
-		setnvalue(v, n);
-	} else
-		setnvalue(v, nvalue(v) + n);
-
-	kp_table_unlock(t);
-}
-
-int kp_table_length(ktap_state *ks, ktap_table *t)
-{
-	unsigned long __maybe_unused flags;
-	int i, len = 0;
-
-	kp_table_lock(t);
-
-	for (i = 0; i < t->sizearray; i++) {
-		ktap_value *v = &t->array[i];
-
-		if (isnil(v))
-			continue;
-		len++;
-	}
-
-	for (i = 0; i < sizenode(t); i++) {
-		ktap_tnode *n = &t->node[i];
-
-		if (isnil(gkey(n)))
-			continue;
-
-		len++;
-	}
-	
-	kp_table_unlock(t);
-	return len;
-}
-
-void kp_table_free(ktap_state *ks, ktap_table *t)
-{
-	if (t->sizearray > 0)
-		kp_free(ks, t->array);
-	if (!isdummy(t->node))
-		kp_free(ks, t->node);
-
-	kp_free_gclist(ks, t->gclist);
-	kp_free(ks, t);
-}
-
-void kp_table_dump(ktap_state *ks, ktap_table *t)
-{
-	int i, count = 0;
-
-	kp_puts(ks, "{");
-	for (i = 0; i < t->sizearray; i++) {
-		ktap_value *v = &t->array[i];
-
-		if (isnil(v))
-			continue;
-
-		if (count)
-			kp_puts(ks, ", ");
-
-		kp_printf(ks, "(%d: ", i + 1);
-		kp_showobj(ks, v);
-		kp_puts(ks, ")");
-		count++;
-	}
-
-	for (i = 0; i < sizenode(t); i++) {
-		ktap_tnode *n = &t->node[i];
-
-		if (isnil(gkey(n)))
-			continue;
-
-		if (count)
-			kp_puts(ks, ", ");
-
-		kp_puts(ks, "(");
-		kp_showobj(ks, gkey(n));
-		kp_puts(ks, ": ");
-		kp_showobj(ks, gval(n));
-		kp_puts(ks, ")");
-		count++;
-	}
-	kp_puts(ks, "}");
-}
-
-/*
- * table-clear only set nil of all elements, not free t->array and nodes.
- * we assume user will reuse table soon after clear table, so reserve array
- * and nodes will avoid memory allocation when insert key-value again.
- */
-void kp_table_clear(ktap_state *ks, ktap_table *t)
-{
-	unsigned long __maybe_unused flags;
-	int i;
-
-	kp_table_lock(t);
-
-	for (i = 0; i < t->sizearray; i++) {
-		ktap_value *v = &t->array[i];
-
-		if (isnil(v))
-			continue;
-
-		setnilvalue(v);
-	}
-
-	for (i = 0; i < sizenode(t); i++) {
-		ktap_tnode *n = &t->node[i];
-
-		if (isnil(gkey(n)))
-			continue;
-
-		setnilvalue(gkey(n));
-		setnilvalue(gval(n));
-	}
-
-	kp_table_unlock(t);
-}
-
-#ifdef __KERNEL__
-static void string_convert(char *output, const char *input)
-{
-	if (strlen(input) > 32) {
-		strncpy(output, input, 32-4);
-		memset(output + 32-4, '.', 3);
-	} else
-		memcpy(output, input, strlen(input));
-}
-
-struct table_hist_record {
-	ktap_value key;
-	ktap_value val;
-};
-
-static int hist_record_cmp(const void *r1, const void *r2)
-{
-	const struct table_hist_record *i = r1;
-	const struct table_hist_record *j = r2;
-
-	if ((nvalue(&i->val) == nvalue(&j->val))) {
-		return 0;
-	} else if ((nvalue(&i->val) < nvalue(&j->val))) {
-		return 1;
-	} else
-		return -1;
-}
-
-static int kp_aggracc_read(ktap_aggraccval *acc);
-
-/* histogram: key should be number or string, value must be number */
-static void table_histdump(ktap_state *ks, ktap_table *t, int shownums)
-{
-	struct table_hist_record *thr;
-	unsigned long __maybe_unused flags;
-	char dist_str[40];
-	int i, ratio, total = 0, count = 0, top_num, is_kernel_address = 0;
-	int size, num;
-
-	size = sizeof(*thr) * (t->sizearray + sizenode(t));
-	thr = kp_malloc(ks, size);
-	if (!thr) {
-		kp_error(ks, "Cannot allocate %d of histogram memory", size);
-		return;
-	}
-
-	kp_table_lock(t);
-
-	for (i = 0; i < t->sizearray; i++) {
-		ktap_value *v = &t->array[i];
-
-		if (isnil(v))
-			continue;
-
-		if (ttisnumber(v))
-			num = nvalue(v);
-		else if (ttisaggracc(v))
-			num = kp_aggracc_read(aggraccvalue(v));
-		else {
-			kp_table_unlock(t);
-			goto error;
-		}
-
-		setnvalue(&thr[count].key, i + 1);
-		setnvalue(&thr[count].val, num);
-		count++;
-		total += num;
-	}
-
-	for (i = 0; i < sizenode(t); i++) {
-		ktap_tnode *n = &t->node[i];
-		ktap_value *v = gval(n);
-
-		if (isnil(gkey(n)))
-			continue;
-
-		if (ttisnumber(v))
-			num = nvalue(v);
-		else if (ttisaggracc(v))
-			num = kp_aggracc_read(aggraccvalue(v));
-		else {
-			kp_table_unlock(t);
-			goto error;
-		}
-
-		setobj(&thr[count].key, gkey(n));
-		setnvalue(&thr[count].val, num);
-		count++;
-		total += num;
-	}
-
-	kp_table_unlock(t);
-
-	sort(thr, count, sizeof(struct table_hist_record),
-	     hist_record_cmp, NULL);
-
-	dist_str[sizeof(dist_str) - 1] = '\0';
-
-	/* check the first key is a kernel text symbol or not */
-	if (ttisnumber(&thr[0].key)) {
-		char str[KSYM_SYMBOL_LEN];
-
-		SPRINT_SYMBOL(str, nvalue(&thr[0].key));
-		if (str[0] != '0' || str[1] != 'x')
-			is_kernel_address = 1;
-	}
-
-	top_num = min(shownums, count);
-	for (i = 0; i < top_num; i++) {
-		ktap_value *key = &thr[i].key;
-		ktap_value *val = &thr[i].val;
-
-		memset(dist_str, ' ', sizeof(dist_str) - 1);
-		ratio = (nvalue(val) * (sizeof(dist_str) - 1)) / total;
-		memset(dist_str, '@', ratio);
-
-		if (ttisstring(key)) {
-			char buf[32 + 1] = {0};
-
-			string_convert(buf, svalue(key));
-			kp_printf(ks, "%32s |%s%-7d\n", buf, dist_str,
-				      nvalue(val));
-		} else if (ttisnumber(key)) {
-			char str[KSYM_SYMBOL_LEN];
-			char buf[32 + 1] = {0};
-
-			if (is_kernel_address) {
-				/* suppose it's a symbol, fix it in future */
-				SPRINT_SYMBOL(str, nvalue(key));
-				string_convert(buf, str);
-				kp_printf(ks, "%32s |%s%-7d\n", buf, dist_str,
-						nvalue(val));
-			} else {
-				kp_printf(ks, "%32d |%s%-7d\n", nvalue(key),
-						dist_str, nvalue(val));
-			}
-		}
-	}
-
-	if (count > shownums)
-		kp_printf(ks, "%32s |\n", "...");
-
-	goto out;
-
- error:
-	kp_puts(ks, "error: table histogram only handle "
-			" (key: string/number val: number)\n");
- out:
-	kp_free(ks, thr);
-}
-
-#define HISTOGRAM_DEFAULT_TOP_NUM	20
-
-#define DISTRIBUTION_STR "------------- Distribution -------------"
-void kp_table_histogram(ktap_state *ks, ktap_table *t)
-{
-	kp_printf(ks, "%32s%s%s\n", "value ", DISTRIBUTION_STR, " count");
-	table_histdump(ks, t, HISTOGRAM_DEFAULT_TOP_NUM);
-}
-
-/*
- * Aggregation Table
- */
-
-static ktap_table *table_new2(ktap_state *ks, ktap_gcobject **list)
-{
-	ktap_table *t = &kp_newobject(ks, KTAP_TTABLE, sizeof(ktap_table),
-				      list)->h;
-	t->flags = (u8)(~0);
-	t->array = NULL;
-	t->sizearray = 0;
-	t->node = (ktap_tnode *)dummynode;
-	t->gclist = NULL;
-	setnodevector(ks, t, 0);
-
-	kp_table_lock_init(t);
-	return t;
-}
-
-static int kp_aggracc_read(ktap_aggraccval *acc)
-{
-	switch (acc->type) {
-	case AGGREGATION_TYPE_COUNT:
-	case AGGREGATION_TYPE_MAX:
-	case AGGREGATION_TYPE_MIN:
-	case AGGREGATION_TYPE_SUM:
-		return acc->val;
-	case AGGREGATION_TYPE_AVG:
-		return acc->val / acc->more;
-	default:
-		return 0;
-	}
-
-}
-
-void kp_aggraccval_dump(ktap_state *ks, ktap_aggraccval *acc)
-{
-	switch (acc->type) {
-	case AGGREGATION_TYPE_COUNT:
-	case AGGREGATION_TYPE_MAX:
-	case AGGREGATION_TYPE_MIN:
-	case AGGREGATION_TYPE_SUM:
-		kp_printf(ks, "%d", acc->val);
-		break;
-	case AGGREGATION_TYPE_AVG:
-		kp_printf(ks, "%d", acc->val / acc->more);
-		break;
-	default:
-		break;
-	}
-}
-
-static void synth_acc(ktap_aggraccval *acc1, ktap_aggraccval *acc2)
-{
-	switch (acc1->type) {
-	case AGGREGATION_TYPE_COUNT:
-		acc2->val += acc1->val;
-		break;
-	case AGGREGATION_TYPE_MAX:
-		acc2->val = max(acc1->val, acc2->val);
-		break;
-	case AGGREGATION_TYPE_MIN:
-		acc2->val = min(acc1->val, acc2->val);
-		break;
-	case AGGREGATION_TYPE_SUM:
-		acc2->val += acc1->val;
-		break;
-	case AGGREGATION_TYPE_AVG:
-		acc2->val += acc1->val;
-		acc2->more += acc1->more;
-		break;
-	default:
-		break;
-	}
-}
-
-static ktap_aggraccval *get_accval(ktap_state *ks, int type,
-				   ktap_gcobject **list)
-{
-	ktap_aggraccval *acc;
-
-	acc = &kp_newobject(ks, KTAP_TAGGRACCVAL, sizeof(ktap_aggraccval),
-				list)->acc;
-	acc->type = type;
-	acc->val = 0;
-	acc->more = 0;
-	return acc;
-}
-
-static void synth_accval(ktap_state *ks, ktap_value *o1, ktap_value *o2,
-			 ktap_gcobject **list)
-{
-	ktap_aggraccval *acc;
-
-	if (isnil(o2)) {
-		acc = get_accval(ks, aggraccvalue(o1)->type, list);
-		acc->val = aggraccvalue(o1)->val;
-		acc->more = aggraccvalue(o1)->more;
-		setaggraccvalue(o2, acc);
-		return;
-	}
-
-	synth_acc(aggraccvalue(o1), aggraccvalue(o2));
-}
-
-static void move_table(ktap_state *ks, ktap_table *t1, ktap_table *t2)
-{
-	ktap_value *newv;
-	ktap_value n;
-	int i;
-
-	for (i = 0; i < t1->sizearray; i++) {
-		ktap_value *v = &t1->array[i];
-
-		if (isnil(v))
-			continue;
-
-		setnvalue(&n, i);
-
-		newv = table_set(ks, t2, &n);
-		synth_accval(ks, v, newv, &t2->gclist);
-	}
-
-	for (i = 0; i < sizenode(t1); i++) {
-		ktap_tnode *node = &t1->node[i];
-
-		if (isnil(gkey(node)))
-			continue;
-
-		newv = table_set(ks, t2, gkey(node));
-		synth_accval(ks, gval(node), newv, &t2->gclist);
-	}
-}
-
-ktap_table *kp_aggrtable_synthesis(ktap_state *ks, ktap_aggrtable *ah)
-{
-	ktap_table *synth_tbl;
-	int cpu;
-
-	synth_tbl = table_new2(ks, &ah->gclist);
-
-	for_each_possible_cpu(cpu) {
-		ktap_table **t = per_cpu_ptr(ah->pcpu_tbl, cpu);
-		move_table(ks, *t, synth_tbl);
-	}
-
-	return synth_tbl;
-}
-
-void kp_aggrtable_dump(ktap_state *ks, ktap_aggrtable *ah)
-{
-	kp_table_dump(ks, kp_aggrtable_synthesis(ks, ah));
-}
-
-ktap_aggrtable *kp_aggrtable_new(ktap_state *ks)
-{
-	ktap_aggrtable *ah;
-	int cpu;
-
-	ah = &kp_newobject(ks, KTAP_TAGGRTABLE, sizeof(ktap_aggrtable),
-			NULL)->ah;
-	ah->pcpu_tbl = alloc_percpu(ktap_table *);
-	ah->gclist = NULL;
-
-	for_each_possible_cpu(cpu) {
-		ktap_table **t = per_cpu_ptr(ah->pcpu_tbl, cpu);
-		*t = table_new2(ks, &ah->gclist);
-	}	
-
-	return ah;
-}
-
-void kp_aggrtable_free(ktap_state *ks, ktap_aggrtable *ah)
-{
-	free_percpu(ah->pcpu_tbl);
-	kp_free_gclist(ks, ah->gclist);
-	kp_free(ks, ah);
-}
-
-static
-void handle_aggr_count(ktap_state *ks, ktap_aggrtable *ah, ktap_value *key)
-{
-	ktap_table *t = *__this_cpu_ptr(ah->pcpu_tbl);
-	ktap_value *v = table_set(ks, t, key);
-	ktap_aggraccval *acc;
-
-	if (isnil(v)) {
-		acc = get_accval(ks, AGGREGATION_TYPE_COUNT, &t->gclist);
-		acc->val = 1;
-		setaggraccvalue(v, acc);
-		return;
-	}
-
-	acc = aggraccvalue(v);
-	acc->val += 1;
-}
-
-static 
-void handle_aggr_max(ktap_state *ks, ktap_aggrtable *ah, ktap_value *key)
-{
-	ktap_table *t = *__this_cpu_ptr(ah->pcpu_tbl);
-	ktap_value *v = table_set(ks, t, key);
-	ktap_aggraccval *acc;
-
-	if (isnil(v)) {
-		acc = get_accval(ks, AGGREGATION_TYPE_MAX, &t->gclist);
-		acc->val = ks->aggr_accval;
-		setaggraccvalue(v, acc);
-		return;
-	}
-
-	acc = aggraccvalue(v);
-	acc->val = max(acc->val, ks->aggr_accval);
-}
-
-static 
-void handle_aggr_min(ktap_state *ks, ktap_aggrtable *ah, ktap_value *key)
-{
-	ktap_table *t = *__this_cpu_ptr(ah->pcpu_tbl);
-	ktap_value *v = table_set(ks, t, key);
-	ktap_aggraccval *acc;
-
-	if (isnil(v)) {
-		acc = get_accval(ks, AGGREGATION_TYPE_MIN, &t->gclist);
-		acc->val = ks->aggr_accval;
-		setaggraccvalue(v, acc);
-		return;
-	}
-
-	acc = aggraccvalue(v);
-	acc->val = min(acc->val, ks->aggr_accval);
-}
-
-static 
-void handle_aggr_sum(ktap_state *ks, ktap_aggrtable *ah, ktap_value *key)
-{
-	ktap_table *t = *__this_cpu_ptr(ah->pcpu_tbl);
-	ktap_value *v = table_set(ks, t, key);
-	ktap_aggraccval *acc;
-
-	if (isnil(v)) {
-		acc = get_accval(ks, AGGREGATION_TYPE_SUM, &t->gclist);
-		acc->val = ks->aggr_accval;
-		setaggraccvalue(v, acc);
-		return;
-	}
-
-	acc = aggraccvalue(v);
-	acc->val += ks->aggr_accval;
-}
-
-static 
-void handle_aggr_avg(ktap_state *ks, ktap_aggrtable *ah, ktap_value *key)
-{
-	ktap_table *t = *__this_cpu_ptr(ah->pcpu_tbl);
-	ktap_value *v = table_set(ks, t, key);
-	ktap_aggraccval *acc;
-
-	if (isnil(v)) {
-		acc = get_accval(ks, AGGREGATION_TYPE_AVG, &t->gclist);
-		acc->val = ks->aggr_accval;
-		acc->more = 1;
-		setaggraccvalue(v, acc);
-		return;
-	}
-
-	acc = aggraccvalue(v);
-	acc->val += ks->aggr_accval;
-	acc->more++;
-}
-
-typedef void (*aggr_func_t)(ktap_state *ks, ktap_aggrtable *ah, ktap_value *k);
-static aggr_func_t kp_aggregation_handler[] = {
-	handle_aggr_count,
-	handle_aggr_max,
-	handle_aggr_min,
-	handle_aggr_sum,
-	handle_aggr_avg
-};
-
-void kp_aggrtable_set(ktap_state *ks, ktap_aggrtable *ah,
-			ktap_value *key, ktap_value *val)
-{
-	if (unlikely(!ttisaggrval(val))) {
-		kp_error(ks, "set invalid value to aggregation table\n");
-		return;
-	}
-
-	kp_aggregation_handler[nvalue(val)](ks, ah, key);
-}
-
-
-void kp_aggrtable_get(ktap_state *ks, ktap_aggrtable *ah, ktap_value *key,
-		      ktap_value *val)
-{
-	ktap_aggraccval acc; /* in stack */
-	const ktap_value *v;
-	int cpu;
-
-	acc.val = -1;
-	acc.more = -1;
-
-	for_each_possible_cpu(cpu) {
-		ktap_table **t = per_cpu_ptr(ah->pcpu_tbl, cpu);
-
-		v = table_get(*t, key);
-		if (isnil(v))
-			continue;
-
-		if (acc.more == -1) {
-			acc = *aggraccvalue(v);
-			continue;
-		}
-
-		synth_acc(aggraccvalue(v), &acc);
-	}
-
-	if (acc.more == -1) {
-		setnilvalue(val);
-	} else {
-		setnvalue(val, kp_aggracc_read(&acc));
-	}
-}
-
-void kp_aggrtable_histogram(ktap_state *ks, ktap_aggrtable *ah)
-{
-	kp_table_histogram(ks, kp_aggrtable_synthesis(ks, ah));
-}
-#endif
diff --git a/drivers/staging/ktap/interpreter/transport.c b/drivers/staging/ktap/interpreter/transport.c
deleted file mode 100644
index 4cd3662..0000000
--- a/drivers/staging/ktap/interpreter/transport.c
+++ /dev/null
@@ -1,636 +0,0 @@
-/*
- * transport.c - ktap transport functionality
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/debugfs.h>
-#include <linux/ftrace_event.h>
-#include <linux/stacktrace.h>
-#include <linux/clocksource.h>
-#include <asm/uaccess.h>
-#include "../include/ktap.h"
-
-struct ktap_trace_iterator {
-	struct ring_buffer	*buffer;
-	int			print_timestamp;
-	void			*private;
-
-	struct trace_iterator	iter;
-};
-
-enum ktap_trace_type {
-	__TRACE_FIRST_TYPE = 0,
-
-	TRACE_FN = 1, /* must be same as ftrace definition in kernel */
-	TRACE_PRINT,
-	TRACE_BPUTS,
-	TRACE_STACK,
-	TRACE_USER_STACK,
-
-	__TRACE_LAST_TYPE,
-};
-
-#define KTAP_TRACE_ITER(iter)	\
-	container_of(iter, struct ktap_trace_iterator, iter)
-
-ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, size_t cnt)
-{
-	int len;
-	int ret;
-
-	if (!cnt)
-		return 0;
-
-	if (s->len <= s->readpos)
-		return -EBUSY;
-
-	len = s->len - s->readpos;
-	if (cnt > len)
-		cnt = len;
-	ret = copy_to_user(ubuf, s->buffer + s->readpos, cnt);
-	if (ret == cnt)
-		return -EFAULT;
-
-	cnt -= ret;
-
-	s->readpos += cnt;
-	return cnt;
-}
-
-int trace_seq_puts(struct trace_seq *s, const char *str)
-{
-	int len = strlen(str);
-
-	if (s->full)
-		return 0;
-
-	if (len > ((PAGE_SIZE - 1) - s->len)) {
-		s->full = 1;
-		return 0;
-	}
-
-	memcpy(s->buffer + s->len, str, len);
-	s->len += len;
-
-	return len;
-}
-
-static int trace_empty(struct trace_iterator *iter)
-{
-	struct ktap_trace_iterator *ktap_iter = KTAP_TRACE_ITER(iter);
-	int cpu;
-
-	for_each_online_cpu(cpu) {
-		if (!ring_buffer_empty_cpu(ktap_iter->buffer, cpu))
-			return 0;
-	}
-
-	return 1;
-}
-
-static void trace_consume(struct trace_iterator *iter)
-{
-	struct ktap_trace_iterator *ktap_iter = KTAP_TRACE_ITER(iter);
-
-	ring_buffer_consume(ktap_iter->buffer, iter->cpu, &iter->ts,
-			    &iter->lost_events);
-}
-
-unsigned long long ns2usecs(cycle_t nsec)
-{
-	nsec += 500;
-	do_div(nsec, 1000);
-	return nsec;
-}
-
-static int trace_print_timestamp(struct trace_iterator *iter)
-{
-	struct trace_seq *s = &iter->seq;
-	unsigned long long t;
-	unsigned long secs, usec_rem;
-
-	t = ns2usecs(iter->ts);
-	usec_rem = do_div(t, USEC_PER_SEC);
-	secs = (unsigned long)t;
-
-	return trace_seq_printf(s, "%5lu.%06lu: ", secs, usec_rem);
-}
-
-/* todo: export kernel function ftrace_find_event in future, and make faster */
-static struct trace_event *(*ftrace_find_event)(int type);
-
-static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
-{
-	struct ktap_trace_iterator *ktap_iter = KTAP_TRACE_ITER(iter);
-	struct trace_entry *entry = iter->ent;
-	struct trace_event *ev;
-
-	ev = ftrace_find_event(entry->type);
-
-	if (ktap_iter->print_timestamp && !trace_print_timestamp(iter))
-		return TRACE_TYPE_PARTIAL_LINE;
-
-	if (ev) {
-		int ret = ev->funcs->trace(iter, 0, ev);
-
-		/* overwrite '\n' at the ending */
-		iter->seq.buffer[iter->seq.len - 1] = '\0';
-		iter->seq.len--;
-		return ret;
-	}
-
-	return TRACE_TYPE_PARTIAL_LINE;
-}
-
-static enum print_line_t print_trace_stack(struct trace_iterator *iter)
-{
-	struct trace_entry *entry = iter->ent;
-	struct stack_trace trace;
-	char str[KSYM_SYMBOL_LEN];
-	int i;
-
-	trace.entries = (unsigned long *)(entry + 1);
-	trace.nr_entries = (iter->ent_size - sizeof(*entry)) /
-			   sizeof(unsigned long);
-
-	if (!trace_seq_puts(&iter->seq, "<stack trace>\n"))
-		return TRACE_TYPE_PARTIAL_LINE;
-
-	for (i = 0; i < trace.nr_entries; i++) {
-		unsigned long p = trace.entries[i];
-
-		if (p == ULONG_MAX)
-			break;
-
-		sprint_symbol(str, p);
-		if (!trace_seq_printf(&iter->seq, " => %s\n", str))
-			return TRACE_TYPE_PARTIAL_LINE;
-	}
-
-	return TRACE_TYPE_HANDLED;
-}
-
-struct ktap_ftrace_entry {
-	struct trace_entry entry;
-	unsigned long ip;
-	unsigned long parent_ip;
-};
-
-static enum print_line_t print_trace_fn(struct trace_iterator *iter)
-{
-	struct ktap_trace_iterator *ktap_iter = KTAP_TRACE_ITER(iter);
-	struct ktap_ftrace_entry *field = (struct ktap_ftrace_entry *)iter->ent;
-	char str[KSYM_SYMBOL_LEN];
-
-	if (ktap_iter->print_timestamp && !trace_print_timestamp(iter))
-		return TRACE_TYPE_PARTIAL_LINE;
-
-	sprint_symbol(str, field->ip);
-	if (!trace_seq_puts(&iter->seq, str))
-		return TRACE_TYPE_PARTIAL_LINE;
-
-	if (!trace_seq_puts(&iter->seq, " <- "))
-		return TRACE_TYPE_PARTIAL_LINE;
-
-	sprint_symbol(str, field->parent_ip);
-	if (!trace_seq_puts(&iter->seq, str))
-		return TRACE_TYPE_PARTIAL_LINE;
-
-	return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t print_trace_bputs(struct trace_iterator *iter)
-{
-	if (!trace_seq_puts(&iter->seq,
-			    (const char *)(*(unsigned long *)(iter->ent + 1))))
-		return TRACE_TYPE_PARTIAL_LINE;
-
-	return TRACE_TYPE_HANDLED;
-}
-
-static enum print_line_t print_trace_line(struct trace_iterator *iter)
-{
-	struct trace_entry *entry = iter->ent;
-	char *str = (char *)(entry + 1);
-
-	if (entry->type == TRACE_PRINT) {
-		if (!trace_seq_printf(&iter->seq, "%s", str))
-			return TRACE_TYPE_PARTIAL_LINE;
-
-		return TRACE_TYPE_HANDLED;
-	}
-
-	if (entry->type == TRACE_BPUTS)
-		return print_trace_bputs(iter);
-
-	if (entry->type == TRACE_STACK)
-		return print_trace_stack(iter);
-
-	if (entry->type == TRACE_FN)
-		return print_trace_fn(iter);
-
-	return print_trace_fmt(iter);
-}
-
-static struct trace_entry *
-peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts,
-		unsigned long *lost_events)
-{
-	struct ktap_trace_iterator *ktap_iter = KTAP_TRACE_ITER(iter);
-	struct ring_buffer_event *event;
-
-	event = ring_buffer_peek(ktap_iter->buffer, cpu, ts, lost_events);
-	if (event) {
-		iter->ent_size = ring_buffer_event_length(event);
-		return ring_buffer_event_data(event);
-	}
-
-	return NULL;
-}
-
-static struct trace_entry *
-__find_next_entry(struct trace_iterator *iter, int *ent_cpu,
-		  unsigned long *missing_events, u64 *ent_ts)
-{
-	struct ktap_trace_iterator *ktap_iter = KTAP_TRACE_ITER(iter);
-	struct ring_buffer *buffer = ktap_iter->buffer;
-	struct trace_entry *ent, *next = NULL;
-	unsigned long lost_events = 0, next_lost = 0;
-	u64 next_ts = 0, ts;
-	int next_cpu = -1;
-	int next_size = 0;
-	int cpu;
-
-	for_each_online_cpu(cpu) {
-		if (ring_buffer_empty_cpu(buffer, cpu))
-			continue;
-
-		ent = peek_next_entry(iter, cpu, &ts, &lost_events);
-		/*
-		 * Pick the entry with the smallest timestamp:
-		 */
-		if (ent && (!next || ts < next_ts)) {
-			next = ent;
-			next_cpu = cpu;
-			next_ts = ts;
-			next_lost = lost_events;
-			next_size = iter->ent_size;
-		}
-	}
-
-	iter->ent_size = next_size;
-
-	if (ent_cpu)
-		*ent_cpu = next_cpu;
-
-	if (ent_ts)
-		*ent_ts = next_ts;
-
-	if (missing_events)
-		*missing_events = next_lost;
-
-	return next;
-}
-
-/* Find the next real entry, and increment the iterator to the next entry */
-static void *trace_find_next_entry_inc(struct trace_iterator *iter)
-{
-	iter->ent = __find_next_entry(iter, &iter->cpu,
-				      &iter->lost_events, &iter->ts);
-	if (iter->ent)
-		iter->idx++;
-
-	return iter->ent ? iter : NULL;
-}
-
-static void poll_wait_pipe(void)
-{
-	set_current_state(TASK_INTERRUPTIBLE);
-	/* sleep for 100 msecs, and try again. */
-	schedule_timeout(HZ / 10);
-}
-
-static int tracing_wait_pipe(struct file *filp)
-{
-	struct trace_iterator *iter = filp->private_data;
-	struct ktap_trace_iterator *ktap_iter = KTAP_TRACE_ITER(iter);
-	ktap_state *ks = ktap_iter->private;
-
-	while (trace_empty(iter)) {
-
-		if ((filp->f_flags & O_NONBLOCK)) {
-			return -EAGAIN;
-		}
-
-		mutex_unlock(&iter->mutex);
-
-		poll_wait_pipe();
-
-		mutex_lock(&iter->mutex);
-
-		if (G(ks)->wait_user && trace_empty(iter))
-			return -EINTR;
-	}
-
-	return 1;
-}
-
-static ssize_t
-tracing_read_pipe(struct file *filp, char __user *ubuf, size_t cnt,
-		  loff_t *ppos)
-{
-	struct trace_iterator *iter = filp->private_data;
-	ssize_t sret;
-
-	/* return any leftover data */
-	sret = trace_seq_to_user(&iter->seq, ubuf, cnt);
-	if (sret != -EBUSY)
-		return sret;
-	/*
-	 * Avoid more than one consumer on a single file descriptor
-	 * This is just a matter of traces coherency, the ring buffer itself
-	 * is protected.
-	 */
-	mutex_lock(&iter->mutex);
-
-waitagain:
-	sret = tracing_wait_pipe(filp);
-	if (sret <= 0)
-		goto out;
-
-	/* stop when tracing is finished */
-	if (trace_empty(iter)) {
-		sret = 0;
-		goto out;
-	}
-
-	if (cnt >= PAGE_SIZE)
-		cnt = PAGE_SIZE - 1;
-
-	/* reset all but tr, trace, and overruns */
-	memset(&iter->seq, 0,
-	       sizeof(struct trace_iterator) -
-	       offsetof(struct trace_iterator, seq));
-	iter->pos = -1;
-
-	while (trace_find_next_entry_inc(iter) != NULL) {
-		enum print_line_t ret;
-		int len = iter->seq.len;
-
-		ret = print_trace_line(iter);
-		if (ret == TRACE_TYPE_PARTIAL_LINE) {
-			/* don't print partial lines */
-			iter->seq.len = len;
-			break;
-		}
-		if (ret != TRACE_TYPE_NO_CONSUME)
-			trace_consume(iter);
-
-		if (iter->seq.len >= cnt)
-			break;
-
-		/*
-		 * Setting the full flag means we reached the trace_seq buffer
-		 * size and we should leave by partial output condition above.
-		 * One of the trace_seq_* functions is not used properly.
-		 */
-		WARN_ONCE(iter->seq.full, "full flag set for trace type %d",
-			  iter->ent->type);
-	}
-
-	/* Now copy what we have to the user */
-	sret = trace_seq_to_user(&iter->seq, ubuf, cnt);
-	if (iter->seq.readpos >= iter->seq.len)
-		trace_seq_init(&iter->seq);
-
-	/*
-	 * If there was nothing to send to user, in spite of consuming trace
-	 * entries, go back to wait for more entries.
-	 */
-	if (sret == -EBUSY)
-		goto waitagain;
-
-out:
-	mutex_unlock(&iter->mutex);
-
-	return sret;
-}
-
-static int tracing_open_pipe(struct inode *inode, struct file *filp)
-{
-	struct ktap_trace_iterator *ktap_iter;
-	ktap_state *ks = inode->i_private;
-
-	/* create a buffer to store the information to pass to userspace */
-	ktap_iter = kzalloc(sizeof(*ktap_iter), GFP_KERNEL);
-	if (!ktap_iter)
-		return -ENOMEM;
-
-	ktap_iter->private = ks;
-	ktap_iter->buffer = G(ks)->buffer;
-	ktap_iter->print_timestamp = G(ks)->parm->print_timestamp;
-	mutex_init(&ktap_iter->iter.mutex);
-	filp->private_data = &ktap_iter->iter;
-
-	nonseekable_open(inode, filp);
-
-	return 0;
-}
-
-static int tracing_release_pipe(struct inode *inode, struct file *file)
-{
-	struct trace_iterator *iter = file->private_data;
-	struct ktap_trace_iterator *ktap_iter = KTAP_TRACE_ITER(iter);
-
-	mutex_destroy(&iter->mutex);
-	kfree(ktap_iter);
-	return 0;
-}
-
-static const struct file_operations tracing_pipe_fops = {
-	.open		= tracing_open_pipe,
-	.read		= tracing_read_pipe,
-	.splice_read	= NULL,
-	.release	= tracing_release_pipe,
-	.llseek		= no_llseek,
-};
-
-/*
- * print_backtrace maybe called from ktap mainthread, so be
- * care on race with event closure thread.
- *
- * preempt disabled in ring_buffer_lock_reserve
- *
- * The implementation is similar with funtion __ftrace_trace_stack.
- */
-void kp_transport_print_backtrace(ktap_state *ks)
-{
-	struct ring_buffer *buffer = G(ks)->buffer;
-	struct ring_buffer_event *event;
-	struct trace_entry *entry;
-	int size;
-
-	size = KTAP_STACK_MAX_ENTRIES * sizeof(unsigned long);
-	event = ring_buffer_lock_reserve(buffer, sizeof(*entry) + size);
-	if (!event) {
-		return;
-	} else {
-		struct stack_trace trace;
-
-		entry = ring_buffer_event_data(event);
-		tracing_generic_entry_update(entry, 0, 0);
-		entry->type = TRACE_STACK;
-
-		trace.nr_entries = 0;
-		trace.skip = 10;
-		trace.max_entries = KTAP_STACK_MAX_ENTRIES;
-		trace.entries = (unsigned long *)(entry + 1);
-		save_stack_trace(&trace);
-
-		ring_buffer_unlock_commit(buffer, event);
-	}
-
-	return;
-}
-
-void kp_transport_event_write(ktap_state *ks, struct ktap_event *e)
-{
-	struct ring_buffer *buffer = G(ks)->buffer;
-	struct ring_buffer_event *event;
-	struct trace_entry *entry;
-
-	event = ring_buffer_lock_reserve(buffer, e->entry_size +
-					 sizeof(struct ftrace_event_call *));
-	if (!event) {
-		return;
-	} else {
-		entry = ring_buffer_event_data(event);
-
-		memcpy(entry, e->entry, e->entry_size);
-
-		ring_buffer_unlock_commit(buffer, event);
-	}
-}
-
-void kp_transport_write(ktap_state *ks, const void *data, size_t length)
-{
-	struct ring_buffer *buffer = G(ks)->buffer;
-	struct ring_buffer_event *event;
-	struct trace_entry *entry;
-	int size;
-
-	size = sizeof(struct trace_entry) + length;
-
-	event = ring_buffer_lock_reserve(buffer, size);
-	if (!event) {
-		return;
-	} else {
-		entry = ring_buffer_event_data(event);
-
-		tracing_generic_entry_update(entry, 0, 0);
-		entry->type = TRACE_PRINT;
-		memcpy(entry + 1, data, length);
-
-		ring_buffer_unlock_commit(buffer, event);
-	}
-}
-
-/* general print function */
-void kp_printf(ktap_state *ks, const char *fmt, ...)
-{
-	char buff[1024];
-	va_list args;
-	int len;
-
-	va_start(args, fmt);
-	len = vscnprintf(buff, 1024, fmt, args);
-	va_end(args);
-
-	buff[len] = '\0';
-	kp_transport_write(ks, buff, len + 1);
-}
-
-void __kp_puts(ktap_state *ks, const char *str)
-{
-	kp_transport_write(ks, str, strlen(str) + 1);
-}
-
-void __kp_bputs(ktap_state *ks, const char *str)
-{
-	struct ring_buffer *buffer = G(ks)->buffer;
-	struct ring_buffer_event *event;
-	struct trace_entry *entry;
-	int size;
-
-	size = sizeof(struct trace_entry) + sizeof(unsigned long *);
-
-	event = ring_buffer_lock_reserve(buffer, size);
-	if (!event) {
-		return;
-	} else {
-		entry = ring_buffer_event_data(event);
-
-		tracing_generic_entry_update(entry, 0, 0);
-		entry->type = TRACE_BPUTS;
-		*(unsigned long *)(entry + 1) = (unsigned long)str;
-
-		ring_buffer_unlock_commit(buffer, event);
-	}
-}
-
-void kp_transport_exit(ktap_state *ks)
-{
-	ring_buffer_free(G(ks)->buffer);
-	debugfs_remove(G(ks)->trace_pipe_dentry);
-}
-
-#define TRACE_BUF_SIZE_DEFAULT	1441792UL /* 16384 * 88 (sizeof(entry)) */
-
-int kp_transport_init(ktap_state *ks, struct dentry *dir)
-{
-	struct ring_buffer *buffer;
-	struct dentry *dentry;
-	char filename[32] = {0};
-
-	ftrace_find_event = (void *)kallsyms_lookup_name("ftrace_find_event");
-	if (!ftrace_find_event) {
-		printk("ktap: cannot lookup ftrace_find_event in kallsyms\n");
-		return -EINVAL;
-	}
-
-	buffer = ring_buffer_alloc(TRACE_BUF_SIZE_DEFAULT, RB_FL_OVERWRITE);
-	if (!buffer)
-		return -ENOMEM;
-
-	sprintf(filename, "trace_pipe_%d", (int)task_tgid_vnr(current));
-
-	dentry = debugfs_create_file(filename, 0444, dir,
-				     ks, &tracing_pipe_fops);
-	if (!dentry) {
-		pr_err("ktapvm: cannot create trace_pipe file in debugfs\n");
-		ring_buffer_free(buffer);
-		return -1;
-	}
-
-	G(ks)->buffer = buffer;
-	G(ks)->trace_pipe_dentry = dentry;
-
-	return 0;
-}
-
diff --git a/drivers/staging/ktap/interpreter/tstring.c b/drivers/staging/ktap/interpreter/tstring.c
deleted file mode 100644
index ce4c88d..0000000
--- a/drivers/staging/ktap/interpreter/tstring.c
+++ /dev/null
@@ -1,287 +0,0 @@
-/*
- * tstring.c - ktap tstring data struction manipulation function
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifdef __KERNEL__
-#include "../include/ktap.h"
-#else
-#include "../include/ktap_types.h"
-#endif
-
-#define STRING_MAXSHORTLEN	40
-
-int kp_tstring_cmp(const ktap_string *ls, const ktap_string *rs)
-{
-	const char *l = getstr(ls);
-	size_t ll = ls->tsv.len;
-	const char *r = getstr(rs);
-	size_t lr = rs->tsv.len;
-
-	for (;;) {
-		int temp = strcmp(l, r);
-		if (temp != 0)
-			return temp;
-		else {
-			/* strings are equal up to a `\0' */
-
-			/* index of first `\0' in both strings */
-			size_t len = strlen(l);
-
-			/* r is finished? */
-			if (len == lr)
-				return (len == ll) ? 0 : 1;
-			else if (len == ll)  /* l is finished? */
-				return -1;
-
-			/*
-			 * both strings longer than `len';
-			 * go on comparing (after the `\0')
-			 */
-			len++;
-			l += len; ll -= len; r += len; lr -= len;
-		}
-	}
-}
-
-/*
- * equality for long strings
- */
-int kp_tstring_eqlngstr(ktap_string *a, ktap_string *b)
-{
-	size_t len = a->tsv.len;
-
-	return (a == b) || ((len == b->tsv.len) &&
-		(memcmp(getstr(a), getstr(b), len) == 0));
-}
-
-/*
- * equality for strings
- */
-int kp_tstring_eqstr(ktap_string *a, ktap_string *b)
-{
-	return (a->tsv.tt == b->tsv.tt) &&
-	       (a->tsv.tt == KTAP_TSHRSTR ? eqshrstr(a, b) :
-				kp_tstring_eqlngstr(a, b));
-}
-
-#define STRING_HASHLIMIT	5
-unsigned int kp_string_hash(const char *str, size_t l, unsigned int seed)
-{
-	unsigned int h = seed ^ l;
-	size_t l1;
-	size_t step = (l >> STRING_HASHLIMIT) + 1;
-
-	for (l1 = l; l1 >= step; l1 -= step)
-		h = h ^ ((h<<5) + (h>>2) + (u8)(str[l1 - 1]));
-
-	return h;
-}
-
-
-/*
- * resizes the string table
- */
-void kp_tstring_resize(ktap_state *ks, int newsize)
-{
-	int i;
-	ktap_stringtable *tb = &G(ks)->strt;
-
-	if (newsize > tb->size) {
-		kp_realloc(ks, tb->hash, tb->size, newsize, ktap_gcobject *);
-
-	for (i = tb->size; i < newsize; i++)
-		tb->hash[i] = NULL;
-	}
-
-	/* rehash */
-	for (i = 0; i < tb->size; i++) {
-		ktap_gcobject *p = tb->hash[i];
-		tb->hash[i] = NULL;
-
-		while (p) {
-			ktap_gcobject *next = gch(p)->next;
-			unsigned int h = lmod(gco2ts(p)->hash, newsize);
-
-			gch(p)->next = tb->hash[h];
-			tb->hash[h] = p;
-			p = next;
-		}
-	}
-
-	if (newsize < tb->size) {
-		/* shrinking slice must be empty */
-		kp_realloc(ks, tb->hash, tb->size, newsize, ktap_gcobject *);
-	}
-
-	tb->size = newsize;
-}
-
-/*
- * creates a new string object
- */
-static ktap_string *createstrobj(ktap_state *ks, const char *str, size_t l,
-				 int tag, unsigned int h, ktap_gcobject **list)
-{
-	ktap_string *ts;
-	size_t totalsize;  /* total size of TString object */
-
-	totalsize = sizeof(ktap_string) + ((l + 1) * sizeof(char));
-	ts = &kp_newobject(ks, tag, totalsize, list)->ts;
-	ts->tsv.len = l;
-	ts->tsv.hash = h;
-	ts->tsv.extra = 0;
-	memcpy(ts + 1, str, l * sizeof(char));
-	((char *)(ts + 1))[l] = '\0';  /* ending 0 */
-	return ts;
-}
-
-/*
- * creates a new short string, inserting it into string table
- */
-static ktap_string *newshrstr(ktap_state *ks, const char *str, size_t l,
-			  unsigned int h)
-{
-	ktap_gcobject **list;
-	ktap_stringtable *tb = &G(ks)->strt;
-	ktap_string *s;
-
-	if (tb->nuse >= (int)tb->size)
-		kp_tstring_resize(ks, tb->size * 2);  /* too crowded */
-
-	list = &tb->hash[lmod(h, tb->size)];
-	s = createstrobj(ks, str, l, KTAP_TSHRSTR, h, list);
-	tb->nuse++;
-	return s;
-}
-
-#ifdef __KERNEL__
-static arch_spinlock_t tstring_lock =
-		(arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
-#endif
-
-/*
- * checks whether short string exists and reuses it or creates a new one
- */
-static ktap_string *internshrstr(ktap_state *ks, const char *str, size_t l)
-{
-	ktap_gcobject *o;
-	ktap_global_state *g = G(ks);
-	ktap_string *ts;
-	unsigned int h = kp_string_hash(str, l, g->seed);
-	unsigned long __maybe_unused flags;
-
-#ifdef __KERNEL__
-	local_irq_save(flags);
-	arch_spin_lock(&tstring_lock);
-#endif
-
-	for (o = g->strt.hash[lmod(h, g->strt.size)]; o != NULL;
-	     o = gch(o)->next) {
-		ts = rawgco2ts(o);
-
-		if (h == ts->tsv.hash && ts->tsv.len == l &&
-		   (memcmp(str, getstr(ts), l * sizeof(char)) == 0))
-			goto out;
-	}
-
-	ts = newshrstr(ks, str, l, h);  /* not found; create a new string */
-
- out:
-#ifdef __KERNEL__
-	arch_spin_unlock(&tstring_lock);
-	local_irq_restore(flags);
-#endif
-	return ts;
-}
-
-
-/*
- * new string (with explicit length)
- */
-ktap_string *kp_tstring_newlstr(ktap_state *ks, const char *str, size_t l)
-{
-	/* short string? */
-	if (l <= STRING_MAXSHORTLEN)
-		return internshrstr(ks, str, l);
-	else
-		return createstrobj(ks, str, l, KTAP_TLNGSTR, G(ks)->seed,
-				    NULL);
-}
-
-ktap_string *kp_tstring_newlstr_local(ktap_state *ks, const char *str, size_t l)
-{
-	return createstrobj(ks, str, l, KTAP_TLNGSTR, G(ks)->seed,
-			    &ks->gclist);
-}
-
-/*
- * new zero-terminated string
- */
-ktap_string *kp_tstring_new(ktap_state *ks, const char *str)
-{
-	return kp_tstring_newlstr(ks, str, strlen(str));
-}
-
-ktap_string *kp_tstring_new_local(ktap_state *ks, const char *str)
-{
-	return createstrobj(ks, str, strlen(str), KTAP_TLNGSTR, G(ks)->seed,
-			    &ks->gclist);
-}
-
-void kp_tstring_freeall(ktap_state *ks)
-{
-	ktap_global_state *g = G(ks);
-	int h;
-
-	for (h = 0; h < g->strt.size; h++) {
-		ktap_gcobject *o, *next;
-		o = g->strt.hash[h];
-		while (o) {
-			next = gch(o)->next;
-			kp_free(ks, o);
-			o = next;
-		}
-		g->strt.hash[h] = NULL;
-	}
-
-	kp_free(ks, g->strt.hash);
-}
-
-/* todo: dump long string, strt table only contain short string */
-void kp_tstring_dump(ktap_state *ks)
-{
-	ktap_gcobject *o;
-	ktap_global_state *g = G(ks);
-	int h;
-
-	kp_printf(ks, "tstring dump: strt size: %d, nuse: %d\n", g->strt.size,
-								 g->strt.nuse);
-	for (h = 0; h < g->strt.size; h++) {
-		for (o = g->strt.hash[h]; o != NULL; o = gch(o)->next) {
-			ktap_string *ts = rawgco2ts(o);
-			kp_printf(ks, "%s [%d]\n", getstr(ts), (int)ts->tsv.len);
-		}
-	}
-}
-
diff --git a/drivers/staging/ktap/interpreter/vm.c b/drivers/staging/ktap/interpreter/vm.c
deleted file mode 100644
index bc7b951..0000000
--- a/drivers/staging/ktap/interpreter/vm.c
+++ /dev/null
@@ -1,1369 +0,0 @@
-/*
- * vm.c - ktap script virtual machine in Linux kernel
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <linux/slab.h>
-#include <linux/ftrace_event.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include "../include/ktap.h"
-
-#define KTAP_MINSTACK 20
-
-/* todo: enlarge maxstack for big system like 64-bit */
-#define KTAP_MAXSTACK           15000
-
-#define KTAP_STACK_SIZE (BASIC_STACK_SIZE * sizeof(ktap_value))
-
-#define CIST_KTAP	(1 << 0) /* call is running a ktap function */
-#define CIST_REENTRY	(1 << 2)
-
-#define isktapfunc(ci)	((ci)->callstatus & CIST_KTAP)
-
-static void ktap_concat(ktap_state *ks, int start, int end)
-{
-	int i, len = 0;
-	StkId top = ks->ci->u.l.base;
-	ktap_string *ts;
-	char *ptr, *buffer;
-
-	for (i = start; i <= end; i++) {
-		if (!ttisstring(top + i)) {
-			kp_error(ks, "cannot concat non-string\n");
-			setnilvalue(top + start);
-			return;
-		}
-
-		len += rawtsvalue(top + i)->tsv.len;
-	}
-
-	if (len >= KTAP_PERCPU_BUFFER_SIZE) {
-		kp_error(ks, "Error: too long string concatenation\n");
-		return;
-	}
-
-	preempt_disable_notrace();
-
-	buffer = kp_percpu_data(KTAP_PERCPU_DATA_BUFFER);
-	ptr = buffer;
-
-	for (i = start; i <= end; i++) {
-		int len = rawtsvalue(top + i)->tsv.len;
-		strncpy(ptr, svalue(top + i), len);
-		ptr += len;
-	}
-	ts = kp_tstring_newlstr(ks, buffer, len);
-	setsvalue(top + start, ts);
-
-	preempt_enable_notrace();
-}
-
-/* todo: compare l == r if both is tstring type? */
-static int lessthan(ktap_state *ks, const ktap_value *l, const ktap_value *r)
-{
-	if (ttisnumber(l) && ttisnumber(r))
-		return NUMLT(nvalue(l), nvalue(r));
-	else if (ttisstring(l) && ttisstring(r))
-		return kp_tstring_cmp(rawtsvalue(l), rawtsvalue(r)) < 0;
-
-	return 0;
-}
-
-static int lessequal(ktap_state *ks, const ktap_value *l, const ktap_value *r)
-{
-	if (ttisnumber(l) && ttisnumber(r))
-		return NUMLE(nvalue(l), nvalue(r));
-	else if (ttisstring(l) && ttisstring(r))
-		return kp_tstring_cmp(rawtsvalue(l), rawtsvalue(r)) <= 0;
-
-	return 0;
-}
-
-static int fb2int (int x)
-{
-	int e = (x >> 3) & 0x1f;
-	if (e == 0)
-		return x;
-	else
-		return ((x & 7) + 8) << (e - 1);
-}
-
-static const ktap_value *ktap_tonumber(const ktap_value *obj, ktap_value *n)
-{
-	if (ttisnumber(obj))
-		return obj;
-
-	return NULL;
-}
-
-static ktap_upval *findupval(ktap_state *ks, StkId level)
-{
-	ktap_global_state *g = G(ks);
-	ktap_gcobject **pp = &ks->openupval;
-	ktap_upval *p;
-	ktap_upval *uv;
-
-	while (*pp != NULL && (p = gco2uv(*pp))->v >= level) {
-		if (p->v == level) {  /* found a corresponding upvalue? */
-			return p;
-		}
-		pp = &p->next;
-	}
-
-	/* not found: create a new one */
-	uv = &kp_newobject(ks, KTAP_TUPVAL, sizeof(ktap_upval), pp)->uv;
-	uv->v = level;  /* current value lives in the stack */
-	uv->u.l.prev = &g->uvhead;  /* double link it in `uvhead' list */
-	uv->u.l.next = g->uvhead.u.l.next;
-	uv->u.l.next->u.l.prev = uv;
-	g->uvhead.u.l.next = uv;
-	return uv;
-}
-
-/* todo: implement this*/
-static void function_close (ktap_state *ks, StkId level)
-{
-}
-
-/* create a new closure */
-static void pushclosure(ktap_state *ks, ktap_proto *p, ktap_upval **encup,
-			StkId base, StkId ra)
-{
-	int nup = p->sizeupvalues;
-	ktap_upvaldesc *uv = p->upvalues;
-	int i;
-	ktap_closure *ncl = kp_newlclosure(ks, nup);
-
-	ncl->l.p = p;
-	setcllvalue(ra, ncl);  /* anchor new closure in stack */
-
-	/* fill in its upvalues */
-	for (i = 0; i < nup; i++) {
-		if (uv[i].instack) {
-			/* upvalue refers to local variable? */
-			ncl->l.upvals[i] = findupval(ks, base + uv[i].idx);
-		} else {
-			/* get upvalue from enclosing function */
-			ncl->l.upvals[i] = encup[uv[i].idx];
-		}
-	}
-	//p->cache = ncl;  /* save it on cache for reuse */
-}
-
-static void gettable(ktap_state *ks, const ktap_value *t, ktap_value *key,
-		     StkId val)
-{
-	if (ttistable(t)) {
-		setobj(val, kp_table_get(hvalue(t), key));
-	} else if (ttisaggrtable(t)) {
-		kp_aggrtable_get(ks, ahvalue(t), key, val);
-	} else {
-		kp_error(ks, "get key from non-table\n");
-	}
-}
-
-static void settable(ktap_state *ks, const ktap_value *t, ktap_value *key,
-		     StkId val)
-{
-	if (ttistable(t)) {
-		kp_table_setvalue(ks, hvalue(t), key, val);
-	} else if (ttisaggrtable(t)) {
-		kp_aggrtable_set(ks, ahvalue(t), key, val);
-	} else {
-		kp_error(ks, "set key to non-table\n");
-	}
-}
-
-static void settable_incr(ktap_state *ks, const ktap_value *t, ktap_value *key,
-			  StkId val)
-{
-	if (unlikely(!ttistable(t))) {
-		kp_error(ks, "use += operator for non-table\n");
-		return;
-	}
-
-	if (unlikely(!ttisnumber(val))) {
-		kp_error(ks, "use non-number to += operator\n");
-		return;
-	}
-
-	kp_table_atomic_inc(ks, hvalue(t), key, nvalue(val));
-}
-
-
-static void growstack(ktap_state *ks, int n)
-{
-	ktap_value *oldstack;
-	int lim;
-	ktap_callinfo *ci;
-	ktap_gcobject *up;
-	int size = ks->stacksize;
-	int needed = (int)(ks->top - ks->stack) + n;
-	int newsize = 2 * size;
-
-	if (newsize > KTAP_MAXSTACK)
-		newsize = KTAP_MAXSTACK;
-
-	if (newsize < needed)
-		newsize = needed;
-
-	if (newsize > KTAP_MAXSTACK) {  /* stack overflow? */
-		kp_error(ks, "stack overflow\n");
-		return;
-	}
-
-	/* realloc stack */
-	oldstack = ks->stack;
-	lim = ks->stacksize;
-	kp_realloc(ks, ks->stack, ks->stacksize, newsize, ktap_value);
-
-	for (; lim < newsize; lim++)
-		setnilvalue(ks->stack + lim);
-	ks->stacksize = newsize;
-	ks->stack_last = ks->stack + newsize;
-
-	/* correct stack */
-	ks->top = (ks->top - oldstack) + ks->stack;
-	for (up = ks->openupval; up != NULL; up = up->gch.next)
-		gco2uv(up)->v = (gco2uv(up)->v - oldstack) + ks->stack;
-
-	for (ci = ks->ci; ci != NULL; ci = ci->prev) {
-		ci->top = (ci->top - oldstack) + ks->stack;
-		ci->func = (ci->func - oldstack) + ks->stack;
-		if (isktapfunc(ci))
-			ci->u.l.base = (ci->u.l.base - oldstack) + ks->stack;
-	}
-	
-}
-
-static inline void checkstack(ktap_state *ks, int n)
-{
-	if (ks->stack_last - ks->top <= n)
-		growstack(ks, n);
-}
-
-static StkId adjust_varargs(ktap_state *ks, ktap_proto *p, int actual)
-{
-	int i;
-	int nfixargs = p->numparams;
-	StkId base, fixed;
-
-	/* move fixed parameters to final position */
-	fixed = ks->top - actual;  /* first fixed argument */
-	base = ks->top;  /* final position of first argument */
-
-	for (i=0; i < nfixargs; i++) {
-		setobj(ks->top++, fixed + i);
-		setnilvalue(fixed + i);
-	}
-
-	return base;
-}
-
-static int poscall(ktap_state *ks, StkId first_result)
-{
-	ktap_callinfo *ci;
-	StkId res;
-	int wanted, i;
-
-	ci = ks->ci;
-
-	res = ci->func;
-	wanted = ci->nresults;
-
-	ks->ci = ci = ci->prev;
-
-	for (i = wanted; i != 0 && first_result < ks->top; i--)
-		setobj(res++, first_result++);
-
-	while(i-- > 0)
-		setnilvalue(res++);
-
-	ks->top = res;
-
-	return (wanted - (-1));
-}
-
-static ktap_callinfo *extend_ci(ktap_state *ks)
-{
-	ktap_callinfo *ci;
-
-	ci = kp_malloc(ks, sizeof(ktap_callinfo));
-	ks->ci->next = ci;
-	ci->prev = ks->ci;
-	ci->next = NULL;
-
-	return ci;
-}
-
-static void free_ci(ktap_state *ks)
-{
-	ktap_callinfo *ci = ks->ci;
-	ktap_callinfo *next;
-
-	if (!ci)
-		return;
-
-	next = ci->next;
-	ci->next = NULL;
-	while ((ci = next) != NULL) {
-		next = ci->next;
-		kp_free(ks, ci);
-	}
-}
-
-#define next_ci(ks) (ks->ci = ks->ci->next ? ks->ci->next : extend_ci(ks))
-#define savestack(ks, p)	((char *)(p) - (char *)ks->stack)
-#define restorestack(ks, n)	((ktap_value *)((char *)ks->stack + (n)))
-
-static int precall(ktap_state *ks, StkId func, int nresults)
-{
-	ktap_cfunction f;
-	ktap_callinfo *ci;
-	ktap_proto *p;
-	StkId base;
-	ptrdiff_t funcr = savestack(ks, func);
-	int n;
-
-	switch (ttype(func)) {
-	case KTAP_TLCF: /* light C function */
-		f = fvalue(func);
-		goto CFUNC;
-	case KTAP_TCCL: /* C closure */
-		f = clcvalue(func)->f;
- CFUNC:
-		checkstack(ks, KTAP_MINSTACK);
-		ci = next_ci(ks);
-		ci->nresults = nresults;
-		ci->func = restorestack(ks, funcr);
-		ci->top = ks->top + KTAP_MINSTACK;
-		ci->callstatus = 0;
-		n = (*f)(ks);
-		poscall(ks, ks->top - n);
-		return 1;
-	case KTAP_TLCL:	
-		p = CLVALUE(func)->p;
-		checkstack(ks, p->maxstacksize);
-		func = restorestack(ks, funcr);
-		n = (int)(ks->top - func) - 1; /* number of real arguments */
-
-		/* complete missing arguments */
-		for (; n < p->numparams; n++)
-			setnilvalue(ks->top++);
-
-		base = (!p->is_vararg) ? func + 1 : adjust_varargs(ks, p, n);
-		ci = next_ci(ks);
-		ci->nresults = nresults;
-		ci->func = func;
-		ci->u.l.base = base;
-		ci->top = base + p->maxstacksize;
-		ci->u.l.savedpc = p->code; /* starting point */
-		ci->callstatus = CIST_KTAP;
-		ks->top = ci->top;
-		return 0;
-	default:
-		kp_error(ks, "attempt to call nil function\n");
-	}
-
-	return 0;
-}
-
-#define RA(i)   (base+GETARG_A(i))
-#define RB(i)   (base+GETARG_B(i))
-#define ISK(x)  ((x) & BITRK)
-#define RC(i)   base+GETARG_C(i)
-#define RKB(i) \
-        ISK(GETARG_B(i)) ? k+INDEXK(GETARG_B(i)) : base+GETARG_B(i)
-#define RKC(i)  \
-        ISK(GETARG_C(i)) ? k+INDEXK(GETARG_C(i)) : base+GETARG_C(i)
-
-#define dojump(ci,i,e) { \
-	ci->u.l.savedpc += GETARG_sBx(i) + e; }
-#define donextjump(ci)  { instr = *ci->u.l.savedpc; dojump(ci, instr, 1); }
-
-#define arith_op(ks, op) { \
-	ktap_value *rb = RKB(instr); \
-	ktap_value *rc = RKC(instr); \
-	if (ttisnumber(rb) && ttisnumber(rc)) { \
-		ktap_number nb = nvalue(rb), nc = nvalue(rc); \
-		setnvalue(ra, op(nb, nc)); \
-	} else {	\
-		kp_puts(ks, "Error: Cannot make arith operation\n");	\
-		return;	\
-	} }
-
-static ktap_value *cfunction_cache_get(ktap_state *ks, int index);
-
-static void ktap_execute(ktap_state *ks)
-{
-	int exec_count = 0;
-	ktap_callinfo *ci;
-	ktap_lclosure *cl;
-	ktap_value *k;
-	unsigned int instr, opcode;
-	StkId base; /* stack pointer */
-	StkId ra; /* register pointer */
-	int res, nresults; /* temp varible */
-
-	ci = ks->ci;
-
- newframe:
-	cl = CLVALUE(ci->func);
-	k = cl->p->k;
-	base = ci->u.l.base;
-
- mainloop:
-	/* main loop of interpreter */
-
-	/* dead loop detaction */
-	if (exec_count++ == kp_max_exec_count) {
-		if (G(ks)->mainthread != ks) {
-			kp_error(ks, "non-mainthread executed instructions "
-				     "exceed max limit(%d)\n",
-					kp_max_exec_count);
-			return;
-		}
-
-		cond_resched();
-		if (signal_pending(current)) {
-			flush_signals(current);
-			return;
-		}
-		exec_count = 0;
-	}
-
-	instr = *(ci->u.l.savedpc++);
-	opcode = GET_OPCODE(instr);
-
-	/* ra is target register */
-	ra = RA(instr);
-
-	switch (opcode) {
-	case OP_MOVE:
-		setobj(ra, base + GETARG_B(instr));
-		break;
-	case OP_LOADK:
-		setobj(ra, k + GETARG_Bx(instr));
-		break;
-	case OP_LOADKX:
-		setobj(ra, k + GETARG_Ax(*ci->u.l.savedpc++));
-		break;
-	case OP_LOADBOOL:
-		setbvalue(ra, GETARG_B(instr));
-		if (GETARG_C(instr))
-			ci->u.l.savedpc++;
-		break;
-	case OP_LOADNIL: {
-		int b = GETARG_B(instr);
-		do {
-			setnilvalue(ra++);
-		} while (b--);
-		break;
-		}
-	case OP_GETUPVAL: {
-		int b = GETARG_B(instr);
-		setobj(ra, cl->upvals[b]->v);
-		break;
-		}
-	case OP_GETTABUP: {
-		int b = GETARG_B(instr);
-		gettable(ks, cl->upvals[b]->v, RKC(instr), ra);
-		base = ci->u.l.base;
-		break;
-		}
-	case OP_GETTABLE:
-		gettable(ks, RB(instr), RKC(instr), ra);
-		base = ci->u.l.base;
-		break;
-	case OP_SETTABUP: {
-		int a = GETARG_A(instr);
-		settable(ks, cl->upvals[a]->v, RKB(instr), RKC(instr));
-		base = ci->u.l.base;
-		break;
-		}
-	case OP_SETTABUP_INCR: {
-		int a = GETARG_A(instr);
-		settable_incr(ks, cl->upvals[a]->v, RKB(instr), RKC(instr));
-		base = ci->u.l.base;
-		break;
-		}
-	case OP_SETUPVAL: {
-		ktap_upval *uv = cl->upvals[GETARG_B(instr)];
-		setobj(uv->v, ra);
-		break;
-		}
-	case OP_SETTABLE:
-		settable(ks, ra, RKB(instr), RKC(instr));
-		base = ci->u.l.base;
-		break;
-	case OP_SETTABLE_INCR:
-		settable_incr(ks, ra, RKB(instr), RKC(instr));
-		base = ci->u.l.base;
-		break;
-	case OP_NEWTABLE: {
-		int b = GETARG_B(instr);
-		int c = GETARG_C(instr);
-		ktap_table *t = kp_table_new(ks);
-		sethvalue(ra, t);
-		if (b != 0 || c != 0)
-			kp_table_resize(ks, t, fb2int(b), fb2int(c));
-		break;
-		}
-	case OP_SELF: {
-		StkId rb = RB(instr);
-		setobj(ra+1, rb);
-		gettable(ks, rb, RKC(instr), ra);
-		base = ci->u.l.base;
-		break;
-		}
-	case OP_ADD:
-		arith_op(ks, NUMADD);
-		break;
-	case OP_SUB:
-		arith_op(ks, NUMSUB);
-		break;
-	case OP_MUL:
-		arith_op(ks, NUMMUL);
-		break;
-	case OP_DIV:
-		/* divide 0 checking */
-		if (!nvalue(RKC(instr))) {
-			kp_error(ks, "divide 0 arith operation\n");
-			return;
-		}
-		arith_op(ks, NUMDIV);
-		break;
-	case OP_MOD:
-		/* divide 0 checking */
-		if (!nvalue(RKC(instr))) {
-			kp_error(ks, "mod 0 arith operation\n");
-			return;
-		}
-		arith_op(ks, NUMMOD);
-		break;
-	case OP_POW:
-		kp_error(ks, "ktap don't support pow arith in kernel\n");
-		return;
-	case OP_UNM: {
-		ktap_value *rb = RB(instr);
-		if (ttisnumber(rb)) {
-			ktap_number nb = nvalue(rb);
-			setnvalue(ra, NUMUNM(nb));
-		}
-		break;
-		}
-	case OP_NOT:
-		res = isfalse(RB(instr));
-		setbvalue(ra, res);
-		break;
-	case OP_LEN: {
-		int len = kp_objlen(ks, RB(instr));
-		if (len < 0)
-			return;
-		setnvalue(ra, len);
-		break;
-		}
-	case OP_CONCAT: {
-		int b = GETARG_B(instr);
-		int c = GETARG_C(instr);
-		ktap_concat(ks, b, c);
-		break;
-		}
-	case OP_JMP:
-		dojump(ci, instr, 0);
-		break;
-	case OP_EQ: {
-		ktap_value *rb = RKB(instr);
-		ktap_value *rc = RKC(instr);
-		if ((int)equalobj(ks, rb, rc) != GETARG_A(instr))
-			ci->u.l.savedpc++;
-		else
-			donextjump(ci);
-
-		base = ci->u.l.base;
-		break;
-		}
-	case OP_LT:
-		if (lessthan(ks, RKB(instr), RKC(instr)) != GETARG_A(instr))
-			ci->u.l.savedpc++;
-		else
-			donextjump(ci);
-		base = ci->u.l.base;
-		break;
-	case OP_LE:
-		if (lessequal(ks, RKB(instr), RKC(instr)) != GETARG_A(instr))
-			ci->u.l.savedpc++;
-		else
-			donextjump(ci);
-		base = ci->u.l.base;
-		break;
-	case OP_TEST:
-		if (GETARG_C(instr) ? isfalse(ra) : !isfalse(ra))
-			ci->u.l.savedpc++;
-		else
-			donextjump(ci);
-		break;
-	case OP_TESTSET: {
-		ktap_value *rb = RB(instr);
-		if (GETARG_C(instr) ? isfalse(rb) : !isfalse(rb))
-			ci->u.l.savedpc++;
-		else {
-			setobj(ra, rb);
-			donextjump(ci);
-		}
-		break;
-		}
-	case OP_CALL: {
-		int b = GETARG_B(instr);
-		int ret;
-
-		nresults = GETARG_C(instr) - 1;
-
-		if (b != 0)
-			ks->top = ra + b;
-
-		ret = precall(ks, ra, nresults);
-		if (ret) { /* C function */
-			if (nresults >= 0)
-				ks->top = ci->top;
-			base = ci->u.l.base;
-			break;
-		} else { /* ktap function */
-			ci = ks->ci;
-			/* this flag is used for return time, see OP_RETURN */
-			ci->callstatus |= CIST_REENTRY;
-			goto newframe;
-		}
-		break;
-		}
-	case OP_TAILCALL: {
-		int b = GETARG_B(instr);
-
-		if (b != 0)
-			ks->top = ra+b;
-		if (precall(ks, ra, -1))  /* C function? */
-			base = ci->u.l.base;
-		else {
-			int aux;
-
-			/* 
-			 * tail call: put called frame (n) in place of
-			 * caller one (o)
-			 */
-			ktap_callinfo *nci = ks->ci;  /* called frame */
-			ktap_callinfo *oci = nci->prev;  /* caller frame */
-			StkId nfunc = nci->func;  /* called function */
-			StkId ofunc = oci->func;  /* caller function */
-			/* last stack slot filled by 'precall' */
-			StkId lim = nci->u.l.base +
-				    CLVALUE(nfunc)->p->numparams;
-
-			/* close all upvalues from previous call */
-			if (cl->p->sizep > 0)
-				function_close(ks, oci->u.l.base);
-
-			/* move new frame into old one */
-			for (aux = 0; nfunc + aux < lim; aux++)
-				setobj(ofunc + aux, nfunc + aux);
-			/* correct base */
-			oci->u.l.base = ofunc + (nci->u.l.base - nfunc);
-			/* correct top */
-			oci->top = ks->top = ofunc + (ks->top - nfunc);
-			oci->u.l.savedpc = nci->u.l.savedpc;
-			/* remove new frame */
-			ci = ks->ci = oci;
-			/* restart ktap_execute over new ktap function */
-			goto newframe;
-		}
-		break;
-		}
-	case OP_RETURN: {
-		int b = GETARG_B(instr);
-		if (b != 0)
-			ks->top = ra+b-1;
-		if (cl->p->sizep > 0)
-			function_close(ks, base);
-		b = poscall(ks, ra);
-
-		/* if it's called from external invocation, just return */
-		if (!(ci->callstatus & CIST_REENTRY))
-			return;
-
-		ci = ks->ci;
-		if (b)
-			ks->top = ci->top;
-		goto newframe;
-		}
-	case OP_FORLOOP: {
-		ktap_number step = nvalue(ra+2);
-		/* increment index */
-		ktap_number idx = NUMADD(nvalue(ra), step);
-		ktap_number limit = nvalue(ra+1);
-		if (NUMLT(0, step) ? NUMLE(idx, limit) : NUMLE(limit, idx)) {
-			ci->u.l.savedpc += GETARG_sBx(instr);  /* jump back */
-			setnvalue(ra, idx);  /* update internal index... */
-			setnvalue(ra+3, idx);  /* ...and external index */
-		}
-		break;
-		}
-	case OP_FORPREP: {
-		const ktap_value *init = ra;
-		const ktap_value *plimit = ra + 1;
-		const ktap_value *pstep = ra + 2;
-
-		if (!ktap_tonumber(init, ra)) {
-			kp_error(ks, KTAP_QL("for")
-				 " initial value must be a number\n");
-			return;
-		} else if (!ktap_tonumber(plimit, ra + 1)) {
-			kp_error(ks, KTAP_QL("for")
-				 " limit must be a number\n");
-			return;
-		} else if (!ktap_tonumber(pstep, ra + 2)) {
-			kp_error(ks, KTAP_QL("for") " step must be a number\n");
-			return;
-		}
-
-		setnvalue(ra, NUMSUB(nvalue(ra), nvalue(pstep)));
-		ci->u.l.savedpc += GETARG_sBx(instr);
-		break;
-		}
-	case OP_TFORCALL: {
-		StkId cb = ra + 3;  /* call base */
-		setobj(cb + 2, ra + 2);
-		setobj(cb + 1, ra + 1);
-		setobj(cb, ra);
-		ks->top = cb + 3;  /* func. + 2 args (state and index) */
-		kp_call(ks, cb, GETARG_C(instr));
-		base = ci->u.l.base;
-		ks->top = ci->top;
-		instr = *(ci->u.l.savedpc++);  /* go to next instruction */
-		ra = RA(instr);
-		}
-		/*go through */
-	case OP_TFORLOOP:
-		if (!ttisnil(ra + 1)) {  /* continue loop? */
-			setobj(ra, ra + 1);  /* save control variable */
-			ci->u.l.savedpc += GETARG_sBx(instr);  /* jump back */
-		}
-		break;
-	case OP_SETLIST: {
-		int n = GETARG_B(instr);
-		int c = GETARG_C(instr);
-		int last;
-		ktap_table *h;
-
-		if (n == 0)
-			n = (int)(ks->top - ra) - 1;
-		if (c == 0)
-			c = GETARG_Ax(*ci->u.l.savedpc++);
-
-		h = hvalue(ra);
-		last = ((c - 1) * LFIELDS_PER_FLUSH) + n;
-		if (last > h->sizearray)  /* needs more space? */
-			kp_table_resizearray(ks, h, last);
-
-		for (; n > 0; n--) {
-			ktap_value *val = ra+n;
-			kp_table_setint(ks, h, last--, val);
-		}
-		/* correct top (in case of previous open call) */
-		ks->top = ci->top;
-		break;
-		}
-	case OP_CLOSURE: {
-		/* need to use closure cache? (multithread contention issue)*/
-		ktap_proto *p = cl->p->p[GETARG_Bx(instr)];
-		pushclosure(ks, p, cl->upvals, base, ra);
-		break;
-		}
-	case OP_VARARG: {
-		int b = GETARG_B(instr) - 1;
-		int j;
-		int n = (int)(base - ci->func) - cl->p->numparams - 1;
-		if (b < 0) {  /* B == 0? */
-			b = n;  /* get all var. arguments */
-			checkstack(ks, n);
-			/* previous call may change the stack */
-			ra = RA(instr);
-			ks->top = ra + n;
-		}
-		for (j = 0; j < b; j++) {
-			if (j < n) {
-				setobj(ra + j, base - n + j);
-			} else
-				setnilvalue(ra + j);
-		}
-		break;
-		}
-	case OP_EXTRAARG:
-		return;
-
-	case OP_EVENT: {
-		struct ktap_event *e = ks->current_event;
-
-		if (unlikely(!e)) {
-			kp_error(ks, "invalid event context\n");
-			return;
-		}
-		setevalue(ra, e);
-		break;
-		}
-
-	case OP_EVENTNAME: {
-		struct ktap_event *e = ks->current_event;
-
-		if (unlikely(!e)) {
-			kp_error(ks, "invalid event context\n");
-			return;
-		}
-		setsvalue(ra, kp_tstring_new(ks, e->call->name));
-		break;
-		}
-	case OP_EVENTARG:
-		if (unlikely(!ks->current_event)) {
-			kp_error(ks, "invalid event context\n");
-			return;
-		}
-
-		kp_event_getarg(ks, ra, GETARG_B(instr));		
-		break;
-	case OP_LOAD_GLOBAL: {
-		ktap_value *cfunc = cfunction_cache_get(ks, GETARG_C(instr));
-		setobj(ra, cfunc);
-		}
-		break;
-
-	case OP_EXIT:
-		return;
-	}
-
-	goto mainloop;
-}
-
-void kp_call(ktap_state *ks, StkId func, int nresults)
-{
-	if (!precall(ks, func, nresults))
-		ktap_execute(ks);
-}
-
-static int cfunction_cache_getindex(ktap_state *ks, ktap_value *fname);
-
-/*
- * This function must be called before all code loaded.
- */
-void kp_optimize_code(ktap_state *ks, int level, ktap_proto *f)
-{
-	int i;
-
-	for (i = 0; i < f->sizecode; i++) {
-		int instr = f->code[i];
-		ktap_value *k = f->k;
-
-		if (GET_OPCODE(instr) == OP_GETTABUP) {
-			if ((GETARG_B(instr) == 0) && ISK(GETARG_C(instr))) {
-				ktap_value *field = k + INDEXK(GETARG_C(instr));
-				if (ttype(field) == KTAP_TSTRING) {
-					int index = cfunction_cache_getindex(ks,
-									field);
-					if (index == -1)
-						break;
-
-					SET_OPCODE(instr, OP_LOAD_GLOBAL);
-					SETARG_C(instr, index);
-					f->code[i] = instr;
-					break;
-				}
-			}
-		}
-	}
-
-	/* continue optimize sub functions */
-	for (i = 0; i < f->sizep; i++)
-		kp_optimize_code(ks, level + 1, f->p[i]);
-}
-
-static ktap_value *cfunction_cache_get(ktap_state *ks, int index)
-{
-	return &G(ks)->cfunction_tbl[index];
-}
-
-static int cfunction_cache_getindex(ktap_state *ks, ktap_value *fname)
-{
-	const ktap_value *gt = kp_table_getint(hvalue(&G(ks)->registry),
-				KTAP_RIDX_GLOBALS);
-	const ktap_value *cfunc;
-	int nr, i;
-
-	nr = G(ks)->nr_builtin_cfunction;
-	cfunc = kp_table_get(hvalue(gt), fname);
-
-	for (i = 0; i < nr; i++) {
-		if (rawequalobj(&G(ks)->cfunction_tbl[i], cfunc))
-			return i;
-	}
-
-	return -1;
-}
-
-static void cfunction_cache_add(ktap_state *ks, ktap_value *func)
-{
-	int nr = G(ks)->nr_builtin_cfunction;
-	setobj(&G(ks)->cfunction_tbl[nr], func);
-	G(ks)->nr_builtin_cfunction++;
-}
-
-static void cfunction_cache_exit(ktap_state *ks)
-{
-	kp_free(ks, G(ks)->cfunction_tbl);
-}
-
-static int cfunction_cache_init(ktap_state *ks)
-{
-	G(ks)->cfunction_tbl = kp_zalloc(ks, sizeof(ktap_value) * 128);
-	if (!G(ks)->cfunction_tbl)
-		return -ENOMEM;
-
-	return 0;
-}
-
-/* function for register library */
-void kp_register_lib(ktap_state *ks, const char *libname, const ktap_Reg *funcs)
-{
-	int i;
-	ktap_table *target_tbl;
-	const ktap_value *gt = kp_table_getint(hvalue(&G(ks)->registry),
-					       KTAP_RIDX_GLOBALS);
-
-	/* lib is null when register baselib function */
-	if (libname == NULL)
-		target_tbl = hvalue(gt);
-	else {
-		ktap_value key, val;
-
-		target_tbl = kp_table_new(ks);
-		kp_table_resize(ks, target_tbl, 0,
-				sizeof(*funcs) / sizeof(ktap_Reg));
-
-		setsvalue(&key, kp_tstring_new(ks, libname));
-		sethvalue(&val, target_tbl);
-		kp_table_setvalue(ks, hvalue(gt), &key, &val);
-	}
-
-	for (i = 0; funcs[i].name != NULL; i++) {
-		ktap_value func_name, cl;
-
-		setsvalue(&func_name, kp_tstring_new(ks, funcs[i].name));
-		setfvalue(&cl, funcs[i].func);
-		kp_table_setvalue(ks, target_tbl, &func_name, &cl);
-
-		cfunction_cache_add(ks, &cl);
-	}
-}
-
-#define BASIC_STACK_SIZE        (2 * KTAP_MINSTACK)
-
-static void kp_init_registry(ktap_state *ks)
-{
-	ktap_value mt;
-	ktap_table *registry = kp_table_new(ks);
-
-	sethvalue(&G(ks)->registry, registry);
-	kp_table_resize(ks, registry, KTAP_RIDX_LAST, 0);
-	setthvalue(ks, &mt, ks);
-	kp_table_setint(ks, registry, KTAP_RIDX_MAINTHREAD, &mt);
-	sethvalue(&mt, kp_table_new(ks));
-	kp_table_setint(ks, registry, KTAP_RIDX_GLOBALS, &mt);
-}
-
-static int kp_init_arguments(ktap_state *ks, int argc, char __user **user_argv)
-{
-	const ktap_value *gt = kp_table_getint(hvalue(&G(ks)->registry),
-			   KTAP_RIDX_GLOBALS);
-	ktap_table *global_tbl = hvalue(gt);
-	ktap_table *arg_tbl = kp_table_new(ks);
-	ktap_value arg_tblval;
-	ktap_value arg_tsval;
-	char **argv;
-	int i, ret;
-	
-	setsvalue(&arg_tsval, kp_tstring_new(ks, "arg"));
-	sethvalue(&arg_tblval, arg_tbl);
-	kp_table_setvalue(ks, global_tbl, &arg_tsval, &arg_tblval);
-
-	if (!argc)
-		return 0;
-
-	if (argc > 1024)
-		return -EINVAL;
-
-	argv = kzalloc(argc * sizeof(char *), GFP_KERNEL);
-	if (!argv)
-		return -ENOMEM;
-
-	ret = copy_from_user(argv, user_argv, argc * sizeof(char *));
-	if (ret < 0) {
-		kfree(argv);
-		return -EFAULT;
-	}
-
-	kp_table_resize(ks, arg_tbl, argc, 1);
-
-	ret = 0;
-	for (i = 0; i < argc; i++) {
-		ktap_value val;
-		char __user *ustr = argv[i];
-		char * kstr;
-		int len;
-		int res;
-
-		len = strlen_user(ustr);
-		if (len > 0x1000) {
-			ret = -EINVAL;
-			break;
-		}
-
-		kstr = kmalloc(len + 1, GFP_KERNEL);
-		if (!kstr) {
-			ret = -ENOMEM;
-			break;
-		}
-
-		if (strncpy_from_user(kstr, ustr, len) < 0) {
-			ret = -EFAULT;
-			break;
-		}
-
-		kstr[len] = '\0';
-
-		if (!kstrtoint(kstr, 10, &res)) {
-			setnvalue(&val, res);
-		} else
-			setsvalue(&val, kp_tstring_new(ks, kstr));
-
-		kp_table_setint(ks, arg_tbl, i, &val);
-
-		kfree(kstr);
-	}
-
-	kfree(argv);
-	return ret;
-}
-
-DEFINE_PER_CPU(int, kp_recursion_context[PERF_NR_CONTEXTS]);
-
-/* todo: make this per-session aware */
-static void __percpu *kp_pcpu_data[KTAP_PERCPU_DATA_MAX][PERF_NR_CONTEXTS];
-
-void *kp_percpu_data(int type)
-{
-	return this_cpu_ptr(kp_pcpu_data[type][trace_get_context_bit()]);
-}
-
-static void free_kp_percpu_data(void)
-{
-	int i, j;
-
-	for (i = 0; i < KTAP_PERCPU_DATA_MAX; i++) {
-		for (j = 0; j < PERF_NR_CONTEXTS; j++) {
-			free_percpu(kp_pcpu_data[i][j]);
-			kp_pcpu_data[i][j] = NULL;
-		}
-	}
-}
-
-static int alloc_kp_percpu_data(void)
-{
-	int data_size[KTAP_PERCPU_DATA_MAX] = {
-		sizeof(ktap_state), KTAP_STACK_SIZE, KTAP_PERCPU_BUFFER_SIZE,
-		KTAP_PERCPU_BUFFER_SIZE, sizeof(ktap_btrace)};
-	int i, j;
-
-	for (i = 0; i < KTAP_PERCPU_DATA_MAX; i++) {
-		for (j = 0; j < PERF_NR_CONTEXTS; j++) {
-			void __percpu *data = __alloc_percpu(data_size[i],
-							     __alignof__(char));
-			if (!data)
-				goto fail;
-			kp_pcpu_data[i][j] = data;
-		}
-	}
-
-	return 0;
-
- fail:
-	free_kp_percpu_data();
-	return -ENOMEM;
-}
-
-static void kp_init_state(ktap_state *ks)
-{
-	ktap_callinfo *ci;
-	int i;
-
-	ks->stacksize = BASIC_STACK_SIZE;
-
-	for (i = 0; i < BASIC_STACK_SIZE; i++)
-		setnilvalue(ks->stack + i);
-
-	ks->top = ks->stack;
-	ks->stack_last = ks->stack + ks->stacksize;
-
-	ci = &ks->baseci;
-	ci->callstatus = 0;
-	ci->func = ks->top;
-	setnilvalue(ks->top++);
-	ci->top = ks->top + KTAP_MINSTACK;
-	ks->ci = ci;
-}
-
-static void free_all_ci(ktap_state *ks)
-{
-	int cpu;
-
-	for_each_possible_cpu(cpu) {
-		ktap_state *ks;
-		int j;
-
-		for (j = 0; j < PERF_NR_CONTEXTS; j++) {
-			if (!kp_pcpu_data[KTAP_PERCPU_DATA_STATE][j])
-				break;
-
-			ks = per_cpu_ptr(kp_pcpu_data[KTAP_PERCPU_DATA_STATE][j], cpu);
-			if (!ks)
-				break;
-
-			free_ci(ks);
-		}
-	}
-
-	free_ci(ks);
-}
-
-void kp_exitthread(ktap_state *ks)
-{
-	/* free local allocation objects, like annotate strings */
-	kp_free_gclist(ks, ks->gclist);
-}
-
-ktap_state *kp_newthread(ktap_state *mainthread)
-{
-	ktap_state *ks;
-
-	ks = kp_percpu_data(KTAP_PERCPU_DATA_STATE);
-	ks->stack = kp_percpu_data(KTAP_PERCPU_DATA_STACK);
-	G(ks) = G(mainthread);
-	ks->gclist = NULL;
-	kp_init_state(ks);
-	return ks;
-}
-
-/*
- * wait ktapio thread read all content in ring buffer.
- *
- * Here we use stupid approach to sync with ktapio thread,
- * note that we cannot use semaphore/completion/other sync method,
- * because ktapio thread could be killed by SIG_KILL in anytime, there
- * have no safe way to up semaphore or wake waitqueue before thread exit.
- *
- * we also cannot use waitqueue of current->signal->wait_chldexit to sync
- * exit, becasue mainthread and ktapio thread are in same thread group.
- *
- * Also ktap mainthread must wait ktapio thread exit, otherwise ktapio
- * thread will oops when access ktap structure.
- */
-static void wait_user_completion(ktap_state *ks)
-{
-	struct task_struct *tsk = G(ks)->task;
-	G(ks)->wait_user = 1;
-
-	while (1) {
-		set_current_state(TASK_INTERRUPTIBLE);
-		/* sleep for 100 msecs, and try again. */
-		schedule_timeout(HZ / 10);
-
-		if (get_nr_threads(tsk) == 1)
-			break;
-	}
-}
-
-/* kp_wait: used for mainthread waiting for exit */
-static void kp_wait(ktap_state *ks)
-{
-	struct task_struct *task = G(ks)->trace_task;
-
-	if (G(ks)->exit)
-		return;
-
-	ks->stop = 0;
-
-	/* tell workload process to start executing */
-	if (G(ks)->parm->workload)
-		send_sig(SIGINT, G(ks)->trace_task, 0);
-
-	while (!ks->stop) {
-		set_current_state(TASK_INTERRUPTIBLE);
-		/* sleep for 100 msecs, and try again. */
-		schedule_timeout(HZ / 10);
-
-		if (signal_pending(current)) {
-			flush_signals(current);
-
-			/* newline for handle CTRL+C display as ^C */
-			kp_puts(ks, "\n");
-			break;
-		}
-
-		/* stop waiting if target pid is exited */
-		if (task && task->state == TASK_DEAD)
-				break;
-	}
-
-}
-
-void kp_exit(ktap_state *ks)
-{
-	set_next_as_exit(ks);
-
-	G(ks)->mainthread->stop = 1;
-	G(ks)->exit = 1;
-}
-
-void kp_final_exit(ktap_state *ks)
-{
-	if (!list_empty(&G(ks)->probe_events_head) ||
-	    !list_empty(&G(ks)->timers))
-		kp_wait(ks);
-
-	if (G(ks)->trace_task)
-		put_task_struct(G(ks)->trace_task);
-
-	kp_exit_timers(ks);
-	kp_probe_exit(ks);
-
-	/* free all resources got by ktap */
-	kp_tstring_freeall(ks);
-	kp_free_all_gcobject(ks);
-	cfunction_cache_exit(ks);
-
-	wait_user_completion(ks);
-
-	kp_transport_exit(ks);
-
-	kp_exitthread(ks);
-	kp_free(ks, ks->stack);
-	free_all_ci(ks);
-
-	free_kp_percpu_data();
-
-	free_cpumask_var(G(ks)->cpumask);
-	kp_free(ks, ks);
-}
-
-/* ktap mainthread initization, main entry for ktap */
-ktap_state *kp_newstate(ktap_parm *parm, struct dentry *dir)
-{
-	ktap_state *ks;
-	pid_t pid;
-	int cpu;
-
-	ks = kzalloc(sizeof(ktap_state) + sizeof(ktap_global_state),
-		     GFP_KERNEL);
-	if (!ks)
-		return NULL;
-
-	ks->stack = kp_malloc(ks, KTAP_STACK_SIZE);
-	G(ks) = (ktap_global_state *)(ks + 1);
-	G(ks)->mainthread = ks;
-	G(ks)->seed = 201236; /* todo: make more random in future */
-	G(ks)->task = current;
-	G(ks)->parm = parm;
-	INIT_LIST_HEAD(&(G(ks)->timers));
-	INIT_LIST_HEAD(&(G(ks)->probe_events_head));
-	G(ks)->exit = 0;
-
-	if (kp_transport_init(ks, dir))
-		goto out;
-
-	pid = (pid_t)parm->trace_pid;
-	if (pid != -1) {
-		struct task_struct *task;
-
-		rcu_read_lock();
-		task = pid_task(find_vpid(pid), PIDTYPE_PID);
-		if (!task) {
-			kp_error(ks, "cannot find pid %d\n", pid);
-			rcu_read_unlock();
-			goto out;
-		}
-		G(ks)->trace_task = task;
-		get_task_struct(task);
-		rcu_read_unlock();
-	}
-
-	if( !alloc_cpumask_var(&G(ks)->cpumask, GFP_KERNEL))
-		goto out;
-
-	cpumask_copy(G(ks)->cpumask, cpu_online_mask);
-
-	cpu = parm->trace_cpu;
-	if (cpu != -1) {
-		if (!cpu_online(cpu)) {
-			printk(KERN_INFO "ktap: cpu %d is not online\n", cpu);
-			goto out;
-		}
-
-		cpumask_clear(G(ks)->cpumask);
-		cpumask_set_cpu(cpu, G(ks)->cpumask);
-	}
-
-	if (cfunction_cache_init(ks))
-		goto out;
-
-	kp_tstring_resize(ks, 512); /* set inital string hashtable size */
-
-	kp_init_state(ks);
-	kp_init_registry(ks);
-	kp_init_arguments(ks, parm->argc, parm->argv);
-
-	/* init library */
-	kp_init_baselib(ks);
-	kp_init_kdebuglib(ks);
-	kp_init_timerlib(ks);
-	kp_init_ansilib(ks);
-
-	if (alloc_kp_percpu_data())
-		goto out;
-
-	if (kp_probe_init(ks))
-		goto out;
-
-	return ks;
-
- out:
-	G(ks)->exit = 1;
-	kp_final_exit(ks);
-	return NULL;
-}
-
diff --git a/drivers/staging/ktap/scripts/basic/backtrace.kp b/drivers/staging/ktap/scripts/basic/backtrace.kp
deleted file mode 100644
index 39b8c39..0000000
--- a/drivers/staging/ktap/scripts/basic/backtrace.kp
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/usr/bin/env ktap
-
-trace sched:sched_switch {
-	print_backtrace()
-}
-
diff --git a/drivers/staging/ktap/scripts/basic/event_trigger.kp b/drivers/staging/ktap/scripts/basic/event_trigger.kp
deleted file mode 100644
index 3cc8b04..0000000
--- a/drivers/staging/ktap/scripts/basic/event_trigger.kp
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/env ktap
-
-soft_disabled = 1
-this_cpu = 0
-
-trace syscalls:sys_enter_open {
-	print(argevent)
-	soft_disabled = 0
-	this_cpu = cpu()
-}
-
-trace *:* {
-	if (soft_disabled == 0 && cpu() == this_cpu) {
-		print(argevent)
-	}
-}
-
-trace syscalls:sys_exit_open {
-	print(argevent)
-	if (cpu() == this_cpu) {
-		exit()
-	}
-}
-
diff --git a/drivers/staging/ktap/scripts/basic/event_trigger_ftrace.kp b/drivers/staging/ktap/scripts/basic/event_trigger_ftrace.kp
deleted file mode 100644
index 7e0d7d3..0000000
--- a/drivers/staging/ktap/scripts/basic/event_trigger_ftrace.kp
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/usr/bin/env ktap
-
-
-#This ktap script will output all function calling between
-#sys_enter_open and sys_exit_open, in one cpu.
-
-soft_disabled = 1
-this_cpu = 0
-
-trace syscalls:sys_enter_open {
-	print(argevent)
-	soft_disabled = 0
-	this_cpu = cpu()
-}
-
-trace ftrace:function {
-	if (soft_disabled == 0 && cpu() == this_cpu) {
-		print(argevent)
-	}
-}
-
-trace syscalls:sys_exit_open {
-	print(argevent)
-	if (cpu() == this_cpu) {
-		exit()
-	}
-}
-
diff --git a/drivers/staging/ktap/scripts/basic/ftrace.kp b/drivers/staging/ktap/scripts/basic/ftrace.kp
deleted file mode 100644
index 9feca2b..0000000
--- a/drivers/staging/ktap/scripts/basic/ftrace.kp
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/usr/bin/env ktap
-
-trace ftrace:function /ip==mutex*/ {
-	print(cpu(), pid(), execname(), argevent)
-}
-
diff --git a/drivers/staging/ktap/scripts/basic/function_time.kp b/drivers/staging/ktap/scripts/basic/function_time.kp
deleted file mode 100644
index e7859a3..0000000
--- a/drivers/staging/ktap/scripts/basic/function_time.kp
+++ /dev/null
@@ -1,57 +0,0 @@
-#!/usr/bin/env ktap
-
-#Demo for thread-local variable
-#
-#Note this kind of function time tracing already handled concurrent issue,
-#but not aware on the recursion problem, user need to aware this limitation,
-#so don't use this script to trace function which could be called recursive.
-
-self = {}
-count_max = 0
-count_min = 0
-count_num = 0
-total_time = 0
-
-printf("measure time(us) of function vfs_read\n");
-
-trace probe:vfs_read {
-	if (execname() == "ktap") {
-		return
-	}
-
-	self[tid()] = gettimeofday_us()
-}
-
-trace probe:vfs_read%return {
-	if (execname() == "ktap") {
-		return
-	}
-
-	if (self[tid()] == nil) {
-		return
-	}
-
-	local durtion = gettimeofday_us() - self[tid()]
-	if (durtion > count_max) {
-		count_max = durtion
-	}
-	local min = count_min
-	if (min == 0 || durtion < min) {
-		count_min = durtion
-	}
-
-	count_num = count_num + 1
-	total_time = total_time + durtion
-
-	self[tid()] = nil
-}
-
-trace_end {
-	printf("avg\tmax\tmin\n");
-	printf("-------------------\n")
-
-	printf("%d\t%d\t%d\n", total_time/count_num,
-		count_max, count_min)
-}
-
-
diff --git a/drivers/staging/ktap/scripts/basic/kretprobe.kp b/drivers/staging/ktap/scripts/basic/kretprobe.kp
deleted file mode 100644
index 82de3cf..0000000
--- a/drivers/staging/ktap/scripts/basic/kretprobe.kp
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/usr/bin/env ktap
-
-trace probe:vfs_read%return fd=$retval {
-	print(execname(), argevent);
-}
-
diff --git a/drivers/staging/ktap/scripts/game/tetris.kp b/drivers/staging/ktap/scripts/game/tetris.kp
deleted file mode 100644
index 7125cd4..0000000
--- a/drivers/staging/ktap/scripts/game/tetris.kp
+++ /dev/null
@@ -1,328 +0,0 @@
-#!/usr/bin/env ktap
- 
-#
-# Tetris KTAP Script
-#
-# Copyright (C) 2013/OCT/05 Tadaki SAKAI
-#
-# based on stapgames (Systemtap Game Collection)
-#   https://github.com/mhiramat/stapgames/blob/master/games/tetris.stp
-#
-#   - Requirements
-#     Kernel Configuration: CONFIG_KPROBE_EVENT=y
-#                           CONFIG_EVENT_TRACING=y
-#                           CONFIG_PERF_EVENTS=y
-#                           CONFIG_DEBUG_FS=y
-#     CPU Architecture : x86_64
-#
-#   - Setup
-#     $ sudo mount -t debugfs none /sys/kernel/debug/
-#
-#     $ git clone https://github.com/ktap/ktap
-#     $ cd ktap
-#     $ make 2>&1 | tee ../make.log
-#     $ sudo make load
-#     $ sudo sh -c 'echo 50000 > /sys/module/ktapvm/parameters/max_exec_count'
-#
-#   - Run Tetris
-#     $ sudo ./ktap scripts/game/tetris.kp
-#
- 
- 
-#
-# utils
-#
- 
-function rand(max) {
-	r = gettimeofday_us()
-	if (r < 0) {
-		r = r * -1
-	}
-	return r % max
-}
- 
-color_table = {}
-color_table["Black"]	= 40
-color_table["Red"]	= 41
-color_table["Green"]	= 42
-color_table["Yellow"]	= 43
-color_table["Blue"]	= 44
-color_table["Purple"]	= 45
-color_table["Cyan"]	= 46
-color_table["White"]	= 47
- 
-function get_color_number(txt) {
-	return color_table[txt]
-}
- 
-color_table_text = {}
-color_table_text[40] = "Black"
-color_table_text[41] = "Red"
-color_table_text[42] = "Green"
-color_table_text[43] = "Yellow"
-color_table_text[44] = "Blue"
-color_table_text[45] = "Purple"
-color_table_text[46] = "Cyan"
-color_table_text[47] = "White"
- 
-function get_color_text(num) {
-	return color_table_text[num]
-}
-
-function update_display() {
-	for (i = 0, 239, 1) {
-		if ((i % 12 - 11) != 0) {
-			tmp = ""
-		} else {
-			tmp = "\n"
-		}
-
-		if (display_buffer[240 + i] == back_text) {
-			printf("%s%s", back_text, tmp)
-		} else {
-			ctext = display_buffer[240 + i]
-			ansi.set_color2(get_color_number(ctext), 
-					get_color_number(ctext))
-			printf("  %s", tmp)
-			ansi.reset_color()
-		}
-
-		# clear the display buffer
-		display_buffer[240 + i] = display_buffer[i]
-	}
-
-	printf("%d\n",point)
-}
-
- 
-#
-# global value
-#
- 
-key_code = 0
-point = 0
-block_number = 0
-height = 0
-height_update = 0
- 
-destination_position = {}
-back_text = {}
-block_color = {}
-display_buffer = {}
- 
-block_data0 = {}
-block_data1 = {}
-block_data2 = {}
-block_data3 = {}
-block_data4 = {}
-block_data5 = {}
-block_data6 = {}
-block_table = {}
- 
-#
-# Initialize
-#
- 
-# Create blocks
-# block is represented by the position from the center.
-# Every block has "L" part in the center except for a bar.
-block_data0[0] = -11 # non-"L" part for each block
-block_data1[0] = -24
-block_data2[0] = 2
-block_data3[0] = 13
-block_data4[0] = -13
-block_data5[0] = -1
-block_data6[0] = 2
-	
-block_table[0] = block_data0
-block_table[1] = block_data1
-block_table[2] = block_data2
-block_table[3] = block_data3
-block_table[4] = block_data4
-block_table[5] = block_data5
-block_table[6] = block_data6
- 
-for (i = 0, len(block_table) - 1, 1) {
-	# common "L" part
-	block_table[i][1] = 0
-	block_table[i][2] = 1
-	block_table[i][3] = -12
-}
- 
-block_table[6][3] = -1 # bar is not common
-# Position: 1 row has 12 columns, 
-# and (x, y) is represented by h = x + y * 12.p
-height = 17 # First block position (center)
-
-for (i = 0, 240, 1) {
-	# Wall and Floor (sentinel)
-	if (((i % 12) < 2) || (i > 228)) {
-		block_color = "White"
-		tmp = block_color
-	} else {
-		back_text = "  "
-		tmp = back_text
-	}
-	display_buffer[i - 1] = tmp
-	display_buffer[240 + i - 1] = tmp
-}
-
-block_number = rand(len(color_table) - 1)
-block_color = get_color_text(block_number + 40)
-
-ansi.clear_screen()
- 
- 
-#
-# Key Input
-#
- 
-trace probe:kbd_event handle=%di event_type=%si event_code=%dx value=%cx {
-	# Only can run it in x86_64
-	#
-	# Register follow x86_64 call conversion:
-	#
-	# x86_64:
-	#	%rcx	4 argument
-	#	%rdx	3 argument
-	#	%rsi	2 argument
-	#	%rdi	1 argument
- 
-	local event_code = arg4
-	local value = arg5
- 
-	if (value != 0) {
-		if ((event_code - 4) != 0) {
-			key_code = event_code
-		}
-	}
-}
- 
- 
-#
-# timer
-#
- 
-tick-200ms {
-	ansi.clear_screen()
- 
-	f = 0 # move/rotate flag
- 
-	if (key_code != 0) { # if key is pressed
-		if(key_code != 103) { #move left or right
-			# d: movement direction
-			if ((key_code - 105) != 0) {
-				if ((key_code - 106) != 0) {
-					d = 0
-				} else {
-					d = 1
-				}
-			} else {
-				d = -1
-			}
- 
-			for (i = 0, 3, 1) { # check if the block can be moved
-				# destination is free
-				if (display_buffer[height +
-					block_table[block_number][i] + d] 
-				    != back_text) {
-					f = 1
-				}
-			}
-			# move if destinations of every block are free
-			if (f == 0) {
-				height = height + d
-			} 
-		} else { # rotate
-			for (i = 0, 3, 1) { # check if block can be rotated
-				# each block position
-				p = block_table[block_number][i]
- 
-				# destination x pos(p/12 rounded)
-				v = (p * 2 + 252) / 24 - 10
-				w = p - v * 12 # destination y pos
- 
-				# destination position
-				destination_position[i] = w * 12 - v
- 
-				# check if desetination is free
-				if (display_buffer[height +
-				    destination_position[i]] != back_text) {
-					f = 1
-				}
-			}
- 
-			if (f == 0) {
-				# rotate if destinations of every block
-				# are free
-				for (i = 0, 3, 1) {
-					block_table[block_number][i] = 
-						destination_position[i] 
-				}
-			}
-		}
-	}
-	key_code = 0 # clear the input key
- 
-	f = 0
-	for (i = 0, 3, 1) { # drop 1 row
-		# check if destination is free
-		p = height + block_table[block_number][i]
-		if (display_buffer[12 + p] != back_text) {
-			f = 1
-		}
- 
-		# copy the moving block to display buffer
-		display_buffer[240 + p] = block_color
-	}
-
-	if ((f == 1) && (height == 17)) {
-		update_display()
-		exit() # exit if there are block at initial position
-	}
- 
-	height_update = !height_update
-	if (height_update != 0) {
-		if(f != 0) { # the block can't drop anymore
-			for (i = 0, 3, 1) {
-				# fix the block
-				display_buffer[height + 
-				  block_table[block_number][i]] = block_color 
-			}
-			# determin the next block
-			block_number = rand(len(color_table) - 1)
- 
-			block_color = get_color_text(block_number + 40)
- 
-			height = 17 # make the block to initial position
-		} else {
-			height = height + 12 # drop the block 1 row
-		}
-	}
- 
-	k = 1
-	for (i = 18, 0, -1) { #check if line is filled
-		# search for filled line
-		j = 10
-		while ((j > 0) && 
-		       (display_buffer[i * 12 + j] != back_text)) {
-			j = j - 1
-		}
- 
-		if (j == 0) { # filled!
-			# add a point: 1 line - 1 point, ..., tetris - 10points
-			point = point + k
-			k = k + 1
- 
-			# drop every upper block
-			j = (i + 1) * 12
-			i = i + 1
-			while (j > 2 * 12) {
-				j = j - 1
-				display_buffer[j] = display_buffer[j - 12] 
-			}
-		}
-	}
- 
-	update_display()
-}
diff --git a/drivers/staging/ktap/scripts/helloworld.kp b/drivers/staging/ktap/scripts/helloworld.kp
deleted file mode 100644
index 5673c15..0000000
--- a/drivers/staging/ktap/scripts/helloworld.kp
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/usr/bin/env ktap
-
-print("Hello World! I am ktap")
diff --git a/drivers/staging/ktap/scripts/interrupt/hardirq_time.kp b/drivers/staging/ktap/scripts/interrupt/hardirq_time.kp
deleted file mode 100644
index 1d3c33e..0000000
--- a/drivers/staging/ktap/scripts/interrupt/hardirq_time.kp
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/usr/bin/env ktap
-
-#this script output each average consumimg time of each hardirq
-s = aggr_table()
-map = {}
-
-trace irq:irq_handler_entry {
-	map[cpu()] = gettimeofday_us()
-}
-
-trace irq:irq_handler_exit {
-	local entry_time = map[cpu()]
-	if (entry_time == nil) {
-		return;
-	}
-
-	s[arg1] = avg(gettimeofday_us() - entry_time)
-	map[cpu()] = nil
-}
-
-trace_end {
-	print("hardirq average executing time (us)")
-	histogram(s)
-}
-
diff --git a/drivers/staging/ktap/scripts/interrupt/softirq_time.kp b/drivers/staging/ktap/scripts/interrupt/softirq_time.kp
deleted file mode 100644
index 7e1a9d8..0000000
--- a/drivers/staging/ktap/scripts/interrupt/softirq_time.kp
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/usr/bin/env ktap
-
-#this script output each average consumimg time of each softirq line
-s = aggr_table()
-map = {}
-
-trace irq:softirq_entry {
-	map[cpu()] = gettimeofday_us()
-}
-
-trace irq:softirq_exit {
-	local entry_time = map[cpu()]
-	if (entry_time == nil) {
-		return;
-	}
-
-	s[arg1] = avg(gettimeofday_us() - entry_time)
-	map[cpu()] = nil
-}
-
-trace_end {
-	print("softirq average executing time (us)")
-	histogram(s)
-}
-
diff --git a/drivers/staging/ktap/scripts/io/kprobes-do-sys-open.kp b/drivers/staging/ktap/scripts/io/kprobes-do-sys-open.kp
deleted file mode 100644
index a15f911..0000000
--- a/drivers/staging/ktap/scripts/io/kprobes-do-sys-open.kp
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env ktap
-
-#Only can run it in x86_64
-#
-#Register follow x86_64 call conversion:
-#
-#x86_64:
-#	%rcx	4 argument
-#	%rdx	3 argument
-#	%rsi	2 argument
-#	%rdi	1 argument
-
-trace probe:do_sys_open dfd=%di filename=%si flags=%dx mode=%cx {
-	printf("[do_sys_open entry]: (%s) open file (%s)\n",
-		execname(),  user_string(arg3))
-}
-
-trace probe:do_sys_open%return fd=$retval {
-	printf("[do_sys_open exit]:  return fd (%d)\n", arg3)
-}
diff --git a/drivers/staging/ktap/scripts/io/traceio.kp b/drivers/staging/ktap/scripts/io/traceio.kp
deleted file mode 100644
index 8a95a25..0000000
--- a/drivers/staging/ktap/scripts/io/traceio.kp
+++ /dev/null
@@ -1,56 +0,0 @@
-#! /usr/bin/env ktap
-
-# Based on systemtap traceio.stp
-
-#this script is broken, fix it soon.
-
-reads = aggr_table()
-writes = aggr_table()
-total_io = aggr_table()
-
-trace syscalls:sys_exit_read {
-	reads[execname()] = sum(arg2)
-	total_io[execname()] = sum(arg2)
-}
-
-trace syscalls:sys_exit_write {
-	writes[execname()] = sum(arg2)
-	total_io[execname()] = sum(arg2)
-}
-
-function humanread_digit(bytes) {
-	if (bytes > 1024*1024*1024) {
-		return bytes/1024/1024/1024
-	} elseif (bytes > 1024*1024) {
-		return bytes/1024/1024
-	} elseif (bytes > 1024) {
-		return bytes/1024
-	} else {
-		return bytes
-	}
-}
-
-function humanread_x(bytes) {
-	if (bytes > 1024*1024*1024) {
-		return " GiB"
-	} elseif (bytes > 1024*1024) {
-		return " MiB"
-	} elseif (bytes > 1024) {
-		return " KiB"
-	} else {
-		return "   B"
-	}
-}
-
-tick-1s {
-	ansi.clear_screen()
-	for (exec, count in pairs(total_io)) {
-		local readnum = reads[exec]
-		local writenum = writes[exec]
-		printf("%15s r: %12d%s w: %12d%s\n", exec,
-			humanread_digit(readnum), humanread_x(readnum),
-			humanread_digit(writenum), humanread_x(writenum))
-	}
-	printf("\n")
-}
-
diff --git a/drivers/staging/ktap/scripts/mem/kmalloc-top.kp b/drivers/staging/ktap/scripts/mem/kmalloc-top.kp
deleted file mode 100644
index f18ed9f..0000000
--- a/drivers/staging/ktap/scripts/mem/kmalloc-top.kp
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/usr/bin/env ktap
-
-kmalloc_stack = {}
-
-trace kmem:kmalloc {
-	kmalloc_stack[backtrace()] += 1
-}
-
-tick-60s {
-	for (k, v in pairs(kmalloc_stack)) {
-		print(k)
-		printf("%d\n\n", v)
-	}
-
-	exit()
-}
-
diff --git a/drivers/staging/ktap/scripts/mem/kmem.kp b/drivers/staging/ktap/scripts/mem/kmem.kp
deleted file mode 100644
index c6f2c99..0000000
--- a/drivers/staging/ktap/scripts/mem/kmem.kp
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/usr/bin/env ktap
-
-count1 = 0
-trace kmem:kmalloc {
-	count1 = count1 + 1
-}
-
-count2 = 0
-trace kmem:kfree {
-	count2 = count2 + 1
-}
-
-count3 = 0
-trace kmem:mm_page_alloc {
-	count3 = count3 + 1
-}
-
-count4 = 0
-trace kmem:mm_page_free {
-	count4 = count4 + 1
-}
-
-trace_end {
-	print("\n")
-	print("kmem:kmalloc:\t", count1)
-	print("kmem:kfree:\t", count2)
-	print("kmem:mm_page_alloc:", count3)
-	print("kmem:mm_page_free:", count4)
-	print("trace ending\n")
-}
diff --git a/drivers/staging/ktap/scripts/profiling/function_profiler.kp b/drivers/staging/ktap/scripts/profiling/function_profiler.kp
deleted file mode 100644
index 589017f..0000000
--- a/drivers/staging/ktap/scripts/profiling/function_profiler.kp
+++ /dev/null
@@ -1,41 +0,0 @@
-#!/usr/bin/env ktap
-
-#kernel function profile
-#You can use this script to know what function is called frequently,
-#without enable CONFIG_FUNCTION_PROFILER in kernel.
-
-s = aggr_table()
-
-trace ftrace:function {
-	s[arg1] = count()
-}
-
-trace_end {
-	histogram(s)
-}
-
-#sample output
-#^C
-#                          value ------------- Distribution ------------- count
-#               sub_preempt_count | @@@@@                                  34904
-#               add_preempt_count | @@@@@                                  33435
-#              nsecs_to_jiffies64 | @@@                                    19919
-# irqtime_account_process_tick... | @                                      9970
-#               account_idle_time | @                                      9880
-#                  _raw_spin_lock |                                        5100
-#                _raw_spin_unlock |                                        5021
-#     _raw_spin_unlock_irqrestore |                                        4235
-#          _raw_spin_lock_irqsave |                                        4232
-#                 __rcu_read_lock |                                        3373
-#               __rcu_read_unlock |                                        3373
-#                  lookup_address |                                        2392
-#             pfn_range_is_mapped |                                        2384
-#      update_cfs_rq_blocked_load |                                        1983
-#                        idle_cpu |                                        1808
-#                       ktime_get |                                        1394
-#            _raw_spin_unlock_irq |                                        1270
-#              _raw_spin_lock_irq |                                        1091
-#                     update_curr |                                        950
-#             irqtime_account_irq |                                        950
-#                             ... |
-#
diff --git a/drivers/staging/ktap/scripts/profiling/stack_profile.kp b/drivers/staging/ktap/scripts/profiling/stack_profile.kp
deleted file mode 100644
index 9794560..0000000
--- a/drivers/staging/ktap/scripts/profiling/stack_profile.kp
+++ /dev/null
@@ -1,26 +0,0 @@
-#!/usr/bin/env ktap
-
-# This ktap script samples stacktrace of system per 10us,
-# you can use generated output to make a flame graph.
-#
-# Flame Graphs:
-# http://dtrace.org/blogs/brendan/2012/03/17/linux-kernel-performance-flame-graphs/
-
-s = aggr_table()
-
-profile-10us {
-	s[backtrace()] = count()
-}
-
-tick-60s {
-	exit()
-}
-
-trace_end {
-	for (k, v in pairs(s)) {
-		print(k)
-		print(v)
-		print()
-	}
-}
-
diff --git a/drivers/staging/ktap/scripts/schedule/sched_transition.kp b/drivers/staging/ktap/scripts/schedule/sched_transition.kp
deleted file mode 100644
index eb54b09..0000000
--- a/drivers/staging/ktap/scripts/schedule/sched_transition.kp
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/usr/bin/env ktap
-
-trace sched:sched_switch {
-	printf("%s ... ", arg1)
-}
diff --git a/drivers/staging/ktap/scripts/schedule/schedtimes.kp b/drivers/staging/ktap/scripts/schedule/schedtimes.kp
deleted file mode 100644
index acef904..0000000
--- a/drivers/staging/ktap/scripts/schedule/schedtimes.kp
+++ /dev/null
@@ -1,125 +0,0 @@
-#!/usr/vin/env ktap
-
-#schedtimer.kp
-#Initially inspired by Systemtap schedtimes.stp
-#and more bugfree compare with Systemtap's version
-#
-#Note that the time value is associate with pid, not with execname strictly,
-#sometime you will found there have sleep time for command "ls", the reason
-#is that sleep time is belong to parent process bash, so clear on this.
-
-RUNNING = 0
-QUEUED = 1
-SLEEPING = 2
-DEAD = 64
-
-run_time = {}
-queued_time = {}
-sleep_time = {}
-io_wait_time = {}
-
-pid_state = {}
-pid_names = {}
-prev_timestamp = {}
-io_wait = {}
-
-trace sched:sched_switch {
-	local prev_comm = arg1
-	local prev_pid = arg2
-	local prev_state = arg4
-	local next_comm = arg5
-	local next_pid = arg6
-	local t = gettimeofday_us()
-
-	if (pid_state[prev_pid] == nil) {
-		#do nothing
-	} elseif (pid_state[prev_pid] == RUNNING) {
-		run_time[prev_pid] += t - prev_timestamp[prev_pid]
-	} elseif (pid_state[prev_pid] == QUEUED) {
-		#found this:
-		#sched_wakeup comm=foo
-		#sched_switch prev_comm=foo
-		run_time[prev_pid] += t - prev_timestamp[prev_pid]
-	}
-
-	pid_names[prev_pid] = prev_comm
-	prev_timestamp[prev_pid] = t
-
-	if (prev_state == DEAD) {
-		pid_state[prev_pid] = DEAD
-	} elseif (prev_state > 0) {
-		if (in_iowait() == 1) {
-			io_wait[prev_pid] = 1
-		}
-		pid_state[prev_pid] = SLEEPING
-	} elseif (prev_state == 0) {
-		pid_state[prev_pid] = QUEUED
-	}
-
-	if (pid_state[next_pid] == nil) {
-		pid_state[next_pid] = RUNNING
-	} elseif (pid_state[next_pid] == QUEUED) {
-		queued_time[next_pid] += t - prev_timestamp[next_pid]
-		pid_state[next_pid] = RUNNING
-	}
-
-	pid_names[next_pid] = next_comm
-	prev_timestamp[next_pid] = t
-}
-
-trace sched:sched_wakeup, sched:sched_wakeup_new {
-	local comm = arg1
-	local wakeup_pid = arg2
-	local success = arg4
-	local t = gettimeofday_us()
-
-	if (pid_state[wakeup_pid] == nil) {
-		#do nothing
-	} elseif (pid_state[wakeup_pid] == SLEEPING) {
-		local durtion = t - prev_timestamp[wakeup_pid]
-
-		sleep_time[wakeup_pid] += durtion
-		if (io_wait[wakeup_pid] == 1) {
-			io_wait_time[wakeup_pid] += durtion
-			io_wait[wakeup_pid] = 0
-		}
-	} elseif (pid_state[wakeup_pid] == RUNNING) {
-		return
-	}
-
-	pid_names[wakeup_pid] = comm
-	prev_timestamp[wakeup_pid] = t
-	pid_state[wakeup_pid] = QUEUED
-}
-
-trace_end {
-	local t = gettimeofday_us()
-	
-	for (pid, state in pairs(pid_state)) {
-		local durtion = t - prev_timestamp[pid]
-		if (state == SLEEPING) {
-			sleep_time[pid] += durtion
-		} elseif (state == QUEUED) {
-			queued_time[pid] += durtion
-		} elseif (state == RUNNING) {
-			run_time[pid] += durtion
-		}
-	}
-
-	printf ("%16s: %6s %10s %10s %10s %10s %10s\n\n",
-		"execname", "pid", "run(us)", "sleep(us)", "io_wait(us)",
-		"queued(us)", "total(us)")
-
-	for (pid, time in pairs(run_time)) {
-		if (sleep_time[pid] == nil) {
-			sleep_time[pid] = 0
-		}
-		if (queued_time[pid] == nil) {
-			queue_time[pid] = 0
-		}
-		printf("%16s: %6d %10d %10d %10d %10d %10d\n",
-			pid_names[pid], pid, run_time[pid], sleep_time[pid],
-			io_wait_time[pid], queued_time[pid],
-			run_time[pid] + sleep_time[pid] + queued_time[pid]);
-	}
-}
diff --git a/drivers/staging/ktap/scripts/syscalls/errinfo.kp b/drivers/staging/ktap/scripts/syscalls/errinfo.kp
deleted file mode 100644
index 049031b..0000000
--- a/drivers/staging/ktap/scripts/syscalls/errinfo.kp
+++ /dev/null
@@ -1,145 +0,0 @@
-#!/usr/bin/env ktap
-
-#errdesc get from include/uapi/asm-generic/errno*.h
-errdesc = {
-	[1] = "Operation not permitted",		#EPERM
-	[2] = "No such file or directory",		#ENOENT
-	[3] = "No such process",			#ESRCH
-	[4] = "Interrupted system call",		#EINRT
-	[5] = "I/O error",				#EIO
-	[6] = "No such device or address",		#ENXIO
-	[7] = "Argument list too long",			#E2BIG
-	[8] = "Exec format error",			#ENOEXEC
-	[9] = "Bad file number",			#EBADF
-	[10] = "No child processes",			#ECHILD
-	[11] = "Try again",				#EAGAIN
-	[12] = "Out of memory",				#ENOMEM
-	[13] = "Permission denied",			#EACCES
-	[14] = "Bad address",				#EFAULT
-	[15] = "Block device required",			#ENOTBLK
-	[16] = "Device or resource busy",		#EBUSY
-	[17] = "File exists",				#EEXIST
-	[18] = "Cross-device link",			#EXDEV
-	[19] = "No such device",			#ENODEV
-	[20] = "Not a directory",			#ENOTDIR
-	[21] = "Is a directory",			#EISDIR
-	[22] = "Invalid argument",			#EINVAL
-	[23] = "File table overflow",			#ENFILE
-	[24] = "Too many open files",			#EMFILE
-	[25] = "Not a typewriter",			#ENOTTY
-	[26] = "Text file busy",			#ETXTBSY
-	[27] = "File too large",			#EFBIG
-	[28] = "No space left on device",		#ENOSPC
-	[29] = "Illegal seek",				#ESPIPE
-	[30] = "Read-only file system",			#EROFS
-	[31] = "Too many links",			#EMLINK
-	[32] = "Broken pipe",				#EPIPE
-	[33] = "Math argument out of domain of func",	#EDOM
-	[34] = "Math result not representable",		#ERANGE
-
-	[35] = "Resource deadlock would occur",		#EDEADLK
-	[36] = "File name too long", 			#ENAMETOOLONG
-	[37] = "No record locks available",		#ENOLCK
-	[38] = "Function not implemented",		#ENOSYS
-	[39] = "Directory not empty",			#ENOTEMPTY		
-	[40] = "Too many symbolic links encountered",	#ELOOP
-	[42] = "No message of desired type",		#ENOMSG
-	[43] = "Identifier removed",			#EIDRM
-	[44] = "Channel number out of range",		#ECHRNG
-	[45] = "Level 2 not synchronized",		#EL2NSYNC
-	[46] = "Level 3 halted",			#EL3HLT
-	[47] = "Level 3 reset",				#EL3RST			
-	[48] = "Link number out of range",		#ELNRNG
-	[49] = "Protocol driver not attached",		#EUNATCH
-	[50] = "No CSI structure available",		#ENOCSI
-	[51] = "Level 2 halted",			#EL2HLT
-	[52] = "Invalid exchange",			#EBADE
-	[53] = "Invalid request descriptor",		#EBADR
-	[54] = "Exchange full",				#EXFULL
-	[55] = "No anode",				#ENOANO
-	[56] = "Invalid request code",			#EBADRQC
-	[57] = "Invalid slot",				#EBADSLT
-
-	[59] = "Bad font file format",			#EBFONT
-	[60] = "Device not a stream",			#ENOSTR
-	[61] = "No data available",			#ENODATA
-	[62] = "Timer expired",				#ETIME
-	[63] = "Out of streams resources",		#ENOSR
-	[64] = "Machine is not on the network",		#ENONET
-	[65] = "Package not installed",			#ENOPKG
-	[66] = "Object is remote",			#EREMOTE
-	[67] = "Link has been severed",			#ENOLINK
-	[68] = "Advertise error",			#EADV
-	[69] = "Srmount error",				#ESRMNT
-	[70] = "Communication error on send",		#ECOMM
-	[71] = "Protocol error",			#EPROTO
-	[72] = "Multihop attempted",			#EMULTIHOP
-	[73] = "RFS specific error",			#EDOTDOT
-	[74] = "Not a data message",			#EBADMSG
-	[75] = "Value too large for defined data type",	#EOVERFLOW
-	[76] = "Name not unique on network",		#ENOTUNIQ
-	[77] = "File descriptor in bad state",		#EBADFD
-	[78] = "Remote address changed",		#EREMCHG
-	[79] = "Can not access a needed shared library", #ELIBACC
-	[80] = "Accessing a corrupted shared library",	#ELIBBAD
-	[81] = ".lib section in a.out corrupted",	#ELIBSCN
-	[82] = "Attempting to link in too many shared libraries", #ELIBMAX
-	[83] = "Cannot exec a shared library directly",	#ELIBEXEC
-	[84] = "Illegal byte sequence",			#EILSEQ
-	[85] = "Interrupted system call should be restarted", #ERESTART
-	[86] = "Streams pipe error",			#ESTRPIPE
-	[87] = "Too many users",			#EUSERS
-	[88] = "Socket operation on non-socket",	#ENOTSOCK
-	[89] = "Destination address required",		#EDESTADDRREQ
-	[90] = "Message too long",			#EMSGSIZE
-	[91] = "Protocol wrong type for socket",	#EPROTOTYPE
-	[92] = "Protocol not available",		#ENOPROTOOPT
-	[93] = "Protocol not supported",		#EPROTONOSUPPORT
-	[94] = "Socket type not supported",		#ESOCKTNOSUPPORT
-	[95] = "Operation not supported on transport endpoint", #EOPNOTSUPP
-	[96] = "Protocol family not supported",		#EPFNOSUPPORT
-	[97] = "Address family not supported by protocol", #EAFNOSUPPORT
-	[98] = "Address already in use",		#EADDRINUSE
-	[99] = "Cannot assign requested address",	#EADDRNOTAVAIL
-	[100] = "Network is down",			#ENETDOWN
-	[101] = "Network is unreachable",		#ENETUNREACH
-	[102] = "Network dropped connection because of reset",	#ENETRESET
-	[103] = "Software caused connection abort",	#ECONNABORTED
-	[104] = "Connection reset by peer",		#ECONNRESET
-	[105] = "No buffer space available",		#ENOBUFS
-	[106] = "Transport endpoint is already connected", #EISCONN
-	[107] = "Transport endpoint is not connected",	#ENOTCONN
-	[108] = " Cannot send after transport endpoint shutdown", #ESHUTDOWN
-	[109] = "Too many references: cannot splice",	#ETOOMANYREFS
-	[110] = "Connection timed out",			#ETIMEDOUT
-	[111] = "Connection refused",			#ECONNREFUSED
-	[112] = "Host is down",				#EHOSTDOWN
-	[113] = "No route to host",			#EHOSTUNREACH
-	[114] = "Operation already in progress",	#EALREADY
-	[115] = "Operation now in progress",		#EINPROGRESS
-	[116] = "Stale NFS file handle",		#ESTALE
-	[117] = "Structure needs cleaning",		#EUCLEAN
-	[118] = "Not a XENIX named type file",		#ENOTNAM
-	[119] = "No XENIX semaphores available",	#ENAVAIL
-	[120] = "Is a named type file",			#EISNAM
-	[121] = "Remote I/O error",			#EREMOTEIO
-	[122] = "Quota exceeded",			#EDQUOT
-	[123] = "No medium found",			#ENOMEDIUM
-	[124] = "Wrong medium type",			#EMEDIUMTYPE
-	[125] = "Operation Canceled",			#ECANCELED
-	[126] = "Required key not available",		#ENOKEY
-	[127] = "Key has expired",			#EKEYEXPIRED
-	[128] = "Key has been revoked",			#EKEYREVOKED
-	[129] = "Key was rejected by service",		#EKEYREJECTED
-	[130] = "Owner died",				#EOWNERDEAD
-	[131] = "State not recoverable",		#ENOTRECOVERABLE
-
-}
-
-trace syscalls:sys_exit_* {
-	if (arg2 < 0) {
-		local errno = -arg2
-		printf("%-15s%-20s\t%d\t%-30s\n",
-			execname(), argname, errno, errdesc[errno])
-	}
-}
diff --git a/drivers/staging/ktap/scripts/syscalls/sctop.kp b/drivers/staging/ktap/scripts/syscalls/sctop.kp
deleted file mode 100644
index 6df45cb..0000000
--- a/drivers/staging/ktap/scripts/syscalls/sctop.kp
+++ /dev/null
@@ -1,14 +0,0 @@
-#! /usr/bin/env ktap
-
-#this script is broken, fix it soon.
-s = {}
-
-trace syscalls:sys_enter_* {
-	s[argname] += 1
-}
-
-tick-5s {
-	ansi.clear_screen()
-	histogram(s)
-	delete(s)
-}
diff --git a/drivers/staging/ktap/scripts/syscalls/syscalls.kp b/drivers/staging/ktap/scripts/syscalls/syscalls.kp
deleted file mode 100644
index 8bbaaca..0000000
--- a/drivers/staging/ktap/scripts/syscalls/syscalls.kp
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/usr/bin/env ktap
-
-trace syscalls:* {
-	print(cpu(), pid(), execname(), argevent)
-}
-
diff --git a/drivers/staging/ktap/scripts/syscalls/syscalls_count.kp b/drivers/staging/ktap/scripts/syscalls/syscalls_count.kp
deleted file mode 100644
index 363c622..0000000
--- a/drivers/staging/ktap/scripts/syscalls/syscalls_count.kp
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/usr/bin/env ktap
-
-s = aggr_table()
-
-trace syscalls:sys_enter_* {
-	s[argname] = count()
-}
-
-trace_end {
-	histogram(s)
-}
-
-print("Press Control-C to stop.")
-
-#Result:
-#
-#[root@jovi ktap]# ./ktap scripts/syscalls_histogram.kp
-#^C
-#                          value ------------- Distribution ------------- count
-#        sys_enter_rt_sigprocmask |@@@@@@                                 326
-#                  sys_enter_read |@@@@@                                  287
-#                 sys_enter_close |@@@@                                   236
-#                  sys_enter_open |@@@@                                   222
-#                sys_enter_stat64 |@@                                     132
-#                sys_enter_select |@@                                     123
-#          sys_enter_rt_sigaction |@@                                     107
-#                  sys_enter_poll |@                                      72
-#                 sys_enter_write |@                                      70
-#            sys_enter_mmap_pgoff |@                                      58
-#               sys_enter_fstat64 |                                       41
-#             sys_enter_nanosleep |                                       23
-#                sys_enter_access |                                       20
-#              sys_enter_mprotect |                                       18
-#               sys_enter_geteuid |                                       17
-#               sys_enter_getegid |                                       16
-#                sys_enter_getuid |                                       16
-#                sys_enter_getgid |                                       16
-#                   sys_enter_brk |                                       15
-#               sys_enter_waitpid |                                       11
-#                  sys_enter_time |                                       10
-#                 sys_enter_ioctl |                                       9
-#                sys_enter_munmap |                                       9
-#               sys_enter_fcntl64 |                                       7
-#                  sys_enter_dup2 |                                       7
-#                 sys_enter_clone |                                       6
-#            sys_enter_exit_group |                                       6
-#                sys_enter_execve |                                       4
-#                  sys_enter_pipe |                                       3
-#          sys_enter_gettimeofday |                                       3
-#              sys_enter_getdents |                                       2
-#             sys_enter_getgroups |                                       2
-#              sys_enter_statfs64 |                                       2
-#                 sys_enter_lseek |                                       2
-#                sys_enter_openat |                                       1
-#              sys_enter_newuname |                                       1
-
diff --git a/drivers/staging/ktap/scripts/syscalls/syscalls_count_by_proc.kp b/drivers/staging/ktap/scripts/syscalls/syscalls_count_by_proc.kp
deleted file mode 100644
index 7b7d722..0000000
--- a/drivers/staging/ktap/scripts/syscalls/syscalls_count_by_proc.kp
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/env ktap
-
-s = aggr_table()
-
-trace syscalls:sys_enter_* {
-	s[execname()] = count()
-}
-
-trace_end {
-	histogram(s)
-}
-
-print("Press Control-C to stop.")
-
-#Result:
-#
-#[root@jovi ktap]# ./ktap scripts/syscalls_histogram2.kp
-#^C
-#                          value ------------- Distribution ------------- count
-#                            sshd |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@      196
-#                          iscsid |@@@@                                   24
-#                        sendmail |@                                      9
-
-
diff --git a/drivers/staging/ktap/scripts/tracepoints/eventcount.kp b/drivers/staging/ktap/scripts/tracepoints/eventcount.kp
deleted file mode 100644
index 9bc357f..0000000
--- a/drivers/staging/ktap/scripts/tracepoints/eventcount.kp
+++ /dev/null
@@ -1,212 +0,0 @@
-#!/usr/bin/env ktap
-
-# showing all tracepoints in histogram style
-
-s = {}
-
-trace *:* {
-	s[argname] += 1
-}
-
-trace_end {
-	histogram(s)
-}
-
-print("Press Control-C to stop.")
-
-#Results:
-#^C
-#
-#                          value ------------- Distribution ------------- count
-#                 rcu_utilization |@@@@@                                  225289
-#                        cpu_idle |@@@                                    120168
-#                    sched_wakeup |@@                                     91950
-#                    timer_cancel |@@                                     91232
-#                     timer_start |@@                                     91201
-#                sched_stat_sleep |@@                                     90981
-#               timer_expire_exit |@@                                     90634
-#              timer_expire_entry |@@                                     90625
-#                  hrtimer_cancel |@                                      75411
-#                   hrtimer_start |@                                      74946
-#                   softirq_raise |@                                      63117
-#                    softirq_exit |@                                      63109
-#                   softirq_entry |@                                      63094
-#                    sched_switch |@                                      62331
-#                 sched_stat_wait |@                                      60491
-#             hrtimer_expire_exit |@                                      47538
-#            hrtimer_expire_entry |@                                      47530
-#              sched_stat_runtime |                                       2780
-#                 kmem_cache_free |                                       2684
-#                kmem_cache_alloc |                                       2415
-#                           kfree |                                       2288
-#                        sys_exit |                                       2145
-#                       sys_enter |                                       2145
-#         sys_exit_rt_sigprocmask |                                       1000
-#        sys_enter_rt_sigprocmask |                                       1000
-#                      timer_init |                                       912
-#              sched_stat_blocked |                                       685
-#                         kmalloc |                                       667
-#           workqueue_execute_end |                                       621
-#         workqueue_execute_start |                                       621
-#                sys_enter_select |                                       566
-#                 sys_exit_select |                                       566
-#                  sys_enter_read |                                       526
-#                   sys_exit_read |                                       526
-#                    mm_page_free |                                       478
-#                   mm_page_alloc |                                       427
-#            mm_page_free_batched |                                       382
-#                   net_dev_queue |                                       296
-#                    net_dev_xmit |                                       296
-#                     consume_skb |                                       296
-#                  sys_exit_write |                                       290
-#                 sys_enter_write |                                       290
-#                       kfree_skb |                                       289
-#           kmem_cache_alloc_node |                                       269
-#                    kmalloc_node |                                       263
-#                 sys_enter_close |                                       249
-#                  sys_exit_close |                                       249
-#                    hrtimer_init |                                       248
-#               netif_receive_skb |                                       242
-#                  sys_enter_open |                                       237
-#                   sys_exit_open |                                       237
-#                       napi_poll |                                       226
-#              sched_migrate_task |                                       207
-#                   sys_exit_poll |                                       173
-#                  sys_enter_poll |                                       173
-#            workqueue_queue_work |                                       152
-#         workqueue_activate_work |                                       152
-#                sys_enter_stat64 |                                       133
-#                 sys_exit_stat64 |                                       133
-#           sys_exit_rt_sigaction |                                       133
-#          sys_enter_rt_sigaction |                                       133
-#               irq_handler_entry |                                       125
-#                irq_handler_exit |                                       125
-#       mm_page_alloc_zone_locked |                                       99
-#             sys_exit_mmap_pgoff |                                       66
-#            sys_enter_mmap_pgoff |                                       66
-#                sys_exit_fstat64 |                                       54
-#               sys_enter_fstat64 |                                       54
-#             sys_enter_nanosleep |                                       51
-#              sys_exit_nanosleep |                                       51
-#                 block_bio_queue |                                       46
-#                 block_bio_remap |                                       46
-#              block_bio_complete |                                       46
-#                  mix_pool_bytes |                                       44
-#              mm_page_pcpu_drain |                                       31
-#                   sys_exit_time |                                       23
-#                  sys_enter_time |                                       23
-#                 sys_exit_access |                                       20
-#                sys_enter_access |                                       20
-#           mix_pool_bytes_nolock |                                       18
-#              sys_enter_mprotect |                                       18
-#               sys_exit_mprotect |                                       18
-#               sys_enter_geteuid |                                       17
-#                sys_exit_geteuid |                                       17
-#                sys_enter_munmap |                                       17
-#                 sys_exit_munmap |                                       17
-#                     block_getrq |                                       16
-#                sys_enter_getuid |                                       16
-#                sys_enter_getgid |                                       16
-#                 sys_exit_getgid |                                       16
-#                 sys_exit_getuid |                                       16
-#                  block_rq_issue |                                       16
-#         scsi_dispatch_cmd_start |                                       16
-#               block_rq_complete |                                       16
-#          scsi_dispatch_cmd_done |                                       16
-#               sys_enter_getegid |                                       16
-#                sys_exit_getegid |                                       16
-#                 block_rq_insert |                                       16
-#         skb_copy_datagram_iovec |                                       15
-#                   sys_enter_brk |                                       15
-#                    sys_exit_brk |                                       15
-#             credit_entropy_bits |                                       14
-#                   wbc_writepage |                                       14
-#                  sys_exit_clone |                                       12
-#              block_touch_buffer |                                       12
-#              sched_process_wait |                                       11
-#               sys_enter_waitpid |                                       11
-#                sys_exit_waitpid |                                       11
-#               writeback_written |                                       10
-#                 writeback_start |                                       10
-#              writeback_queue_io |                                       10
-#     ext4_es_lookup_extent_enter |                                       9
-#                 sys_enter_ioctl |                                       9
-#                  sys_exit_ioctl |                                       9
-#       ext4_ext_map_blocks_enter |                                       9
-#        ext4_ext_map_blocks_exit |                                       9
-#      ext4_es_lookup_extent_exit |                                       9
-#           ext4_es_insert_extent |                                       9
-#            ext4_ext_show_extent |                                       8
-#                 extract_entropy |                                       8
-#ext4_es_find_delayed_extent_exit |                                       8
-# ext4_es_find_delayed_extent_... |                                       8
-#         writeback_pages_written |                                       7
-#                   sys_exit_dup2 |                                       7
-#                  sys_enter_dup2 |                                       7
-#                 signal_generate |                                       7
-#               sys_enter_fcntl64 |                                       7
-#                sys_exit_fcntl64 |                                       7
-#              global_dirty_state |                                       7
-#     writeback_dirty_inode_start |                                       7
-#             block_bio_backmerge |                                       7
-#           writeback_dirty_inode |                                       7
-#                sched_wakeup_new |                                       6
-#              sched_process_free |                                       6
-#            sys_enter_exit_group |                                       6
-#                    task_newtask |                                       6
-#                 sys_enter_clone |                                       6
-#              sched_process_fork |                                       6
-#              sched_process_exit |                                       6
-#           sys_exit_gettimeofday |                                       5
-#                  signal_deliver |                                       5
-#          sys_enter_gettimeofday |                                       5
-#          writeback_single_inode |                                       4
-#                sys_enter_execve |                                       4
-#                     task_rename |                                       4
-#              sched_process_exec |                                       4
-#              block_dirty_buffer |                                       4
-#                 sys_exit_execve |                                       4
-#                    block_unplug |                                       4
-#               sched_stat_iowait |                                       4
-#    writeback_single_inode_start |                                       4
-#                      block_plug |                                       4
-#           writeback_write_inode |                                       3
-#                  sys_enter_pipe |                                       3
-#            writeback_dirty_page |                                       3
-#     writeback_write_inode_start |                                       3
-#           ext4_mark_inode_dirty |                                       3
-#              ext4_journal_start |                                       3
-#                   sys_exit_pipe |                                       3
-#           jbd2_drop_transaction |                                       2
-#             jbd2_commit_locking |                                       2
-#            jbd2_commit_flushing |                                       2
-#               jbd2_handle_start |                                       2
-#                  jbd2_run_stats |                                       2
-#               sys_exit_getdents |                                       2
-#           jbd2_checkpoint_stats |                                       2
-#             sys_enter_getgroups |                                       2
-#               jbd2_start_commit |                                       2
-#                 jbd2_end_commit |                                       2
-#              ext4_da_writepages |                                       2
-#               jbd2_handle_stats |                                       2
-#              sys_enter_statfs64 |                                       2
-#               sys_exit_statfs64 |                                       2
-#              sys_exit_getgroups |                                       2
-#                  sys_exit_lseek |                                       2
-#                 sys_enter_lseek |                                       2
-#              sys_enter_getdents |                                       2
-#             ext4_da_write_pages |                                       2
-#             jbd2_commit_logging |                                       2
-#             ext4_request_blocks |                                       1
-#                 sys_exit_openat |                                       1
-#     ext4_discard_preallocations |                                       1
-#              ext4_mballoc_alloc |                                       1
-#                sys_enter_openat |                                       1
-#       ext4_da_writepages_result |                                       1
-#            ext4_allocate_blocks |                                       1
-#              sys_enter_newuname |                                       1
-#    ext4_da_update_reserve_space |                                       1
-# ext4_get_reserved_cluster_alloc |                                       1
-#               sys_exit_newuname |                                       1
-#           writeback_wake_thread |                                       1
-
diff --git a/drivers/staging/ktap/scripts/tracepoints/eventcount_by_proc.kp b/drivers/staging/ktap/scripts/tracepoints/eventcount_by_proc.kp
deleted file mode 100644
index 8706f73..0000000
--- a/drivers/staging/ktap/scripts/tracepoints/eventcount_by_proc.kp
+++ /dev/null
@@ -1,59 +0,0 @@
-#!/usr/bin/env ktap
-
-# showing all tracepoints in histogram style
-
-s = aggr_table()
-
-trace *:* {
-	s[execname()] = count()
-}
-
-trace_end {
-	histogram(s)
-}
-
-print("Press Control-C to stop.")
-
-#Results:
-#^C
-#                          value ------------- Distribution ------------- count
-#                       swapper/0 |@@@@@@@@@@@@                           354378
-#                       swapper/1 |@@@@@@@@@@                             284984
-#                              ps |@@@@                                   115697
-#                        ksmtuned |@@@                                    95857
-#                          iscsid |@@                                     80008
-#                             awk |@                                      30354
-#                      irqbalance |                                       16530
-#                       rcu_sched |                                       15892
-#                        sendmail |                                       14463
-#                     kworker/0:1 |                                       10540
-#                    kworker/u4:2 |                                       9250
-#                     kworker/1:2 |                                       7943
-#                           sleep |                                       7555
-#                           crond |                                       3911
-#                     ksoftirqd/0 |                                       3817
-#                            sshd |                                       2849
-#                 systemd-journal |                                       2209
-#                     migration/1 |                                       1601
-#                     migration/0 |                                       1350
-#                        dhclient |                                       1343
-#                 nm-dhcp-client. |                                       1208
-#                     ksoftirqd/1 |                                       1064
-#                      watchdog/1 |                                       966
-#                      watchdog/0 |                                       964
-#                      khugepaged |                                       776
-#                     dbus-daemon |                                       611
-#                         rpcbind |                                       607
-#                           gdbus |                                       529
-#                  NetworkManager |                                       399
-#                     jbd2/dm-1-8 |                                       378
-#                   modem-manager |                                       184
-#                  abrt-watch-log |                                       157
-#                         polkitd |                                       156
-#                   rs:main Q:Reg |                                       153
-#                    avahi-daemon |                                       151
-#                        rsyslogd |                                       102
-#                         systemd |                                       96
-#                    kworker/0:1H |                                       45
-#                          smartd |                                       30
-
diff --git a/drivers/staging/ktap/scripts/tracepoints/tracepoints.kp b/drivers/staging/ktap/scripts/tracepoints/tracepoints.kp
deleted file mode 100644
index 5d08869..0000000
--- a/drivers/staging/ktap/scripts/tracepoints/tracepoints.kp
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/usr/bin/env ktap
-
-trace *:* {
-	print(cpu(), pid(), execname(), argevent)
-}
-
diff --git a/drivers/staging/ktap/scripts/userspace/uprobes-malloc.kp b/drivers/staging/ktap/scripts/userspace/uprobes-malloc.kp
deleted file mode 100644
index 14c172f..0000000
--- a/drivers/staging/ktap/scripts/userspace/uprobes-malloc.kp
+++ /dev/null
@@ -1,9 +0,0 @@
-#!/usr/bin/env ktap
-
-trace probe:/lib/libc.so.6:0x000773c0 {
-	print("entry:", execname(), argevent)
-}
-
-trace probe:/lib/libc.so.6:0x000773c0%return {
-	print("exit:", execname(), argevent)
-}
diff --git a/drivers/staging/ktap/test/aggr_table.kp b/drivers/staging/ktap/test/aggr_table.kp
deleted file mode 100644
index 985b634..0000000
--- a/drivers/staging/ktap/test/aggr_table.kp
+++ /dev/null
@@ -1,50 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#---------------------------------#
-
-s = aggr_table()
-
-s["count"] = count()
-s["count"] = count()
-s["count"] = count()
-
-s["max"] = max(1)
-s["max"] = max(0)
-s["max"] = max(100)
-
-s["min"] = min(50)
-s["min"] = min(2)
-s["min"] = min(100)
-
-s["sum"] = sum(10)
-s["sum"] = sum(20)
-s["sum"] = sum(30)
-
-s["avg"] = avg(10)
-s["avg"] = avg(20)
-s["avg"] = avg(30)
-
-if (s["count"] != 3) {
-	failed()
-}
-
-if (s["max"] != 100) {
-	failed()
-}
-
-if (s["min"] != 2) {
-	failed()
-}
-
-if (s["sum"] != 60) {
-	failed()
-}
-
-if (s["avg"] != 20) {
-	failed()
-}
diff --git a/drivers/staging/ktap/test/ansi.kp b/drivers/staging/ktap/test/ansi.kp
deleted file mode 100644
index e8a2783..0000000
--- a/drivers/staging/ktap/test/ansi.kp
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env ktap
-
-ansi.clear_screen()
-
-ansi.set_color(32)
-printf("this line should be Green color\n")
-
-ansi.set_color(31)
-printf("this line should be Red color\n")
-
-ansi.set_color2(34, 43)
-printf("this line should be Blue color, with Yellow background\n")
-
-ansi.reset_color()
-ansi.set_color3(34, 46, 4)
-printf("this line should be Blue color, with Cyan background, underline single attribute\n")
-
-ansi.reset_color()
-ansi.new_line()
-
diff --git a/drivers/staging/ktap/test/arg.kp b/drivers/staging/ktap/test/arg.kp
deleted file mode 100644
index 0cf16eb..0000000
--- a/drivers/staging/ktap/test/arg.kp
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#-----------------------------------------#
-
-if (!arg[0]) {
-	failed()
-}
-
-if (arg[1] != 1) {
-	failed()
-}
-
-if (arg[2] != "testing") {
-	failed()
-}
-
-if (arg[3] != "2 3 4") {
-	failed()
-}
diff --git a/drivers/staging/ktap/test/arith.kp b/drivers/staging/ktap/test/arith.kp
deleted file mode 100644
index 32880a1..0000000
--- a/drivers/staging/ktap/test/arith.kp
+++ /dev/null
@@ -1,27 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#-----------------------------------------#
-
-a = 4
-b = 5
-
-if ((a + b) != 9) {
-	failed()
-}
-
-if ((a - b) != -1) {
-	failed()
-}
-
-if ((a % b) != 4) {
-	failed()
-}
-
-if ((a / b) != 0) {
-	failed()
-}
diff --git a/drivers/staging/ktap/test/bench/sembench.c b/drivers/staging/ktap/test/bench/sembench.c
deleted file mode 100644
index 0811934..0000000
--- a/drivers/staging/ktap/test/bench/sembench.c
+++ /dev/null
@@ -1,556 +0,0 @@
-/*
- * copyright Oracle 2007.  Licensed under GPLv2
- * To compile: gcc -Wall -o sembench sembench.c -lpthread
- *
- * usage: sembench -t thread count -w wakenum -r runtime -o op
- * op can be: 0 (ipc sem) 1 (nanosleep) 2 (futexes)
- *
- * example:
- *	sembench -t 1024 -w 512 -r 60 -o 2
- * runs 1024 threads, waking up 512 at a time, running for 60 seconds using
- * futex locking.
- *
- */
-#define  _GNU_SOURCE
-#define _POSIX_C_SOURCE 199309
-#include <fcntl.h>
-#include <sched.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/sem.h>
-#include <sys/ipc.h>
-#include <sys/types.h>
-#include <sys/mman.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <string.h>
-#include <time.h>
-#include <sys/time.h>
-#include <sys/syscall.h>
-#include <errno.h>
-
-#define VERSION "0.2"
-
-/* futexes have been around since 2.5.something, but it still seems I
- * need to make my own syscall.  Sigh.
- */
-#define FUTEX_WAIT              0
-#define FUTEX_WAKE              1
-#define FUTEX_FD                2
-#define FUTEX_REQUEUE           3
-#define FUTEX_CMP_REQUEUE       4
-#define FUTEX_WAKE_OP           5
-static inline int futex (int *uaddr, int op, int val,
-			 const struct timespec *timeout,
-			 int *uaddr2, int val3)
-{
-	return syscall(__NR_futex, uaddr, op, val, timeout, uaddr2, val3);
-}
-
-static void smp_mb(void)
-{
-	__sync_synchronize();
-}
-
-static int all_done = 0;
-static int timeout_test = 0;
-
-#define SEMS_PERID 250
-
-struct sem_operations;
-
-struct lockinfo {
-	unsigned long id;
-	unsigned long index;
-	int data;
-	pthread_t tid;
-	struct lockinfo *next;
-	struct sem_operations *ops;
-	unsigned long ready;
-};
-
-struct sem_wakeup_info {
-	int wakeup_count;
-	struct sembuf sb[SEMS_PERID];
-};
-
-struct sem_operations {
-	void (*wait)(struct lockinfo *l);
-	int (*wake)(struct sem_wakeup_info *wi, int num_semids, int num);
-	void (*setup)(struct sem_wakeup_info **wi, int num_semids);
-	void (*cleanup)(int num_semids);
-	char *name;
-};
-
-int *semid_lookup = NULL;
-
-pthread_mutex_t worklist_mutex = PTHREAD_MUTEX_INITIALIZER;
-static unsigned long total_burns = 0;
-static unsigned long min_burns = ~0UL;
-static unsigned long max_burns = 0;
-
-/* currently running threads */
-static int thread_count = 0;
-
-struct lockinfo *worklist = NULL;
-static int workers_started = 0;
-
-/* total threads started */
-static int num_threads = 2048;
-
-static void worklist_add(struct lockinfo *l)
-{
-	smp_mb();
-	l->ready = 1;
-}
-
-static struct lockinfo *worklist_rm(void)
-{
-	static int last_index = 0;
-	int i;
-	struct lockinfo *l;
-
-	for (i = 0; i < num_threads; i++) {
-		int test = (last_index + i) % num_threads;
-
-		l = worklist + test;
-		smp_mb();
-		if (l->ready) {
-			l->ready = 0;
-			last_index = test;
-			return l;
-		}
-	}
-	return NULL;
-}
-
-/* ipc semaphore post& wait */
-void wait_ipc_sem(struct lockinfo *l)
-{
-	struct sembuf sb;
-	int ret;
-	struct timespec *tvp = NULL;
-	struct timespec tv = { 0, 1 };
-
-	sb.sem_num = l->index;
-	sb.sem_flg = 0;
-
-	sb.sem_op = -1;
-	l->data = 1;
-
-	if (timeout_test && (l->id % 5) == 0)
-		tvp = &tv;
-
-	worklist_add(l);
-	ret = semtimedop(semid_lookup[l->id], &sb, 1, tvp);
-
-	while(l->data != 0 && tvp) {
-		struct timespec tv2 = { 0, 500 };
-		nanosleep(&tv2, NULL);
-	}
-
-	if (l->data != 0) {
-		if (tvp)
-			return;
-		fprintf(stderr, "wakeup without data update\n");
-		exit(1);
-	}
-	if (ret) {
-		if (errno == EAGAIN && tvp)
-			return;
-		perror("semtimed op");
-		exit(1);
-	}
-}
-
-int ipc_wake_some(struct sem_wakeup_info *wi, int num_semids, int num)
-{
-	int i;
-	int ret;
-	struct lockinfo *l;
-	int found = 0;
-
-	for (i = 0; i < num_semids; i++) {
-		wi[i].wakeup_count = 0;
-	}
-	while(num > 0) {
-		struct sembuf *sb;
-		l = worklist_rm();
-		if (!l)
-			break;
-		if (l->data != 1)
-			fprintf(stderr, "warning, lockinfo data was %d\n",
-				l->data);
-		l->data = 0;
-		sb = wi[l->id].sb + wi[l->id].wakeup_count;
-		sb->sem_num = l->index;
-		sb->sem_op = 1;
-		sb->sem_flg = IPC_NOWAIT;
-		wi[l->id].wakeup_count++;
-		found++;
-		num--;
-	}
-	if (!found)
-		return 0;
-	for (i = 0; i < num_semids; i++) {
-		int wakeup_total;
-		int cur;
-		int offset = 0;
-		if (!wi[i].wakeup_count)
-			continue;
-		wakeup_total = wi[i].wakeup_count;
-		while(wakeup_total > 0) {
-			cur = wakeup_total > 64 ? 64 : wakeup_total;
-			ret = semtimedop(semid_lookup[i], wi[i].sb + offset,
-					 cur, NULL);
-			if (ret) {
-				perror("semtimedop");
-				exit(1);
-			}
-			offset += cur;
-			wakeup_total -= cur;
-		}
-	}
-	return found;
-}
-
-void setup_ipc_sems(struct sem_wakeup_info **wi, int num_semids)
-{
-	int i;
-	*wi = malloc(sizeof(**wi) * num_semids);
-	semid_lookup = malloc(num_semids * sizeof(int));
-	for(i = 0; i < num_semids; i++) {
-		semid_lookup[i] = semget(IPC_PRIVATE, SEMS_PERID,
-					 IPC_CREAT | 0777);
-		if (semid_lookup[i] < 0) {
-			perror("semget");
-			exit(1);
-		}
-	}
-	sleep(10);
-}
-
-void cleanup_ipc_sems(int num)
-{
-	int i;
-	for (i = 0; i < num; i++) {
-		semctl(semid_lookup[i], 0, IPC_RMID);
-	}
-}
-
-struct sem_operations ipc_sem_ops = {
-	.wait = wait_ipc_sem,
-	.wake = ipc_wake_some,
-	.setup = setup_ipc_sems,
-	.cleanup = cleanup_ipc_sems,
-	.name = "ipc sem operations",
-};
-
-/* futex post & wait */
-void wait_futex_sem(struct lockinfo *l)
-{
-	int ret;
-	l->data = 1;
-	worklist_add(l);
-	while(l->data == 1) {
-		ret = futex(&l->data, FUTEX_WAIT, 1, NULL, NULL, 0);
-		/*
-		if (ret && ret != EWOULDBLOCK) {
-			perror("futex wait");
-			exit(1);
-		}*/
-	}
-}
-
-int futex_wake_some(struct sem_wakeup_info *wi, int num_semids, int num)
-{
-	int i;
-	int ret;
-	struct lockinfo *l;
-	int found = 0;
-
-	for (i = 0; i < num; i++) {
-		l = worklist_rm();
-		if (!l)
-			break;
-		if (l->data != 1)
-			fprintf(stderr, "warning, lockinfo data was %d\n",
-				l->data);
-		l->data = 0;
-		ret = futex(&l->data, FUTEX_WAKE, 1, NULL, NULL, 0);
-		if (ret < 0) {
-			perror("futex wake");
-			exit(1);
-		}
-		found++;
-	}
-	return found;
-}
-
-void setup_futex_sems(struct sem_wakeup_info **wi, int num_semids)
-{
-	return;
-}
-
-void cleanup_futex_sems(int num)
-{
-	return;
-}
-
-struct sem_operations futex_sem_ops = {
-	.wait = wait_futex_sem,
-	.wake = futex_wake_some,
-	.setup = setup_futex_sems,
-	.cleanup = cleanup_futex_sems,
-	.name = "futex sem operations",
-};
-
-/* nanosleep sems here */
-void wait_nanosleep_sem(struct lockinfo *l)
-{
-	int ret;
-	struct timespec tv = { 0, 1000000 };
-	int count = 0;
-
-	l->data = 1;
-	worklist_add(l);
-	while(l->data) {
-		ret = nanosleep(&tv, NULL);
-		if (ret) {
-			perror("nanosleep");
-			exit(1);
-		}
-		count++;
-	}
-}
-
-int nanosleep_wake_some(struct sem_wakeup_info *wi, int num_semids, int num)
-{
-	int i;
-	struct lockinfo *l;
-
-	for (i = 0; i < num; i++) {
-		l = worklist_rm();
-		if (!l)
-			break;
-		if (l->data != 1)
-			fprintf(stderr, "warning, lockinfo data was %d\n",
-				l->data);
-		l->data = 0;
-	}
-	return i;
-}
-
-void setup_nanosleep_sems(struct sem_wakeup_info **wi, int num_semids)
-{
-	return;
-}
-
-void cleanup_nanosleep_sems(int num)
-{
-	return;
-}
-
-struct sem_operations nanosleep_sem_ops = {
-	.wait = wait_nanosleep_sem,
-	.wake = nanosleep_wake_some,
-	.setup = setup_nanosleep_sems,
-	.cleanup = cleanup_nanosleep_sems,
-	.name = "nano sleep sem operations",
-};
-
-void *worker(void *arg)
-{
-	struct lockinfo *l = (struct lockinfo *)arg;
-	int burn_count = 0;
-	pthread_t tid = pthread_self();
-	size_t pagesize = getpagesize();
-	char *buf = malloc(pagesize);
-
-	if (!buf) {
-		perror("malloc");
-		exit(1);
-	}
-
-	l->tid = tid;
-	workers_started = 1;
-	smp_mb();
-
-	while(!all_done) {
-		l->ops->wait(l);
-		if (all_done)
-			break;
-		burn_count++;
-	}
-	pthread_mutex_lock(&worklist_mutex);
-	total_burns += burn_count;
-	if (burn_count < min_burns)
-		min_burns = burn_count;
-	if (burn_count > max_burns)
-		max_burns = burn_count;
-	thread_count--;
-	pthread_mutex_unlock(&worklist_mutex);
-	return (void *)0;
-}
-
-void print_usage(void)
-{
-	printf("usage: sembench [-t threads] [-w wake incr] [-r runtime]");
-	printf("                [-o num] (0=ipc, 1=nanosleep, 2=futex)\n");
-	exit(1);
-}
-
-#define NUM_OPERATIONS 3
-struct sem_operations *allops[NUM_OPERATIONS] = { &ipc_sem_ops,
-						&nanosleep_sem_ops,
-						&futex_sem_ops};
-
-int main(int ac, char **av) {
-	int ret;
-	int i;
-	int semid = 0;
-	int sem_num = 0;
-	int burn_count = 0;
-	struct sem_wakeup_info *wi = NULL;
-	struct timeval start;
-	struct timeval now;
-	int num_semids = 0;
-	int wake_num = 256;
-	int run_secs = 30;
-	int pagesize = getpagesize();
-	char *buf = malloc(pagesize);
-	struct sem_operations *ops = allops[0];
-	cpu_set_t cpu_mask;
-	cpu_set_t target_mask;
-	int target_cpu = 0;
-	int max_cpu = -1;
-
-	if (!buf) {
-		perror("malloc");
-		exit(1);
-	}
-	for (i = 1; i < ac; i++) {
-		if (strcmp(av[i], "-t") == 0) {
-			if (i == ac -1)
-				print_usage();
-			num_threads = atoi(av[i+1]);
-			i++;
-		} else if (strcmp(av[i], "-w") == 0) {
-			if (i == ac -1)
-				print_usage();
-			wake_num = atoi(av[i+1]);
-			i++;
-		} else if (strcmp(av[i], "-r") == 0) {
-			if (i == ac -1)
-				print_usage();
-			run_secs = atoi(av[i+1]);
-			i++;
-		} else if (strcmp(av[i], "-o") == 0) {
-			int index;
-			if (i == ac -1)
-				print_usage();
-			index = atoi(av[i+1]);
-			if (index >= NUM_OPERATIONS) {
-				fprintf(stderr, "invalid operations %d\n",
-					index);
-				exit(1);
-			}
-			ops = allops[index];
-			i++;
-		} else if (strcmp(av[i], "-T") == 0) {
-			timeout_test = 1;
-		} else if (strcmp(av[i], "-h") == 0) {
-			print_usage();
-		}
-	}
-	num_semids = (num_threads + SEMS_PERID - 1) / SEMS_PERID;
-	ops->setup(&wi, num_semids);
-
-	ret = sched_getaffinity(0, sizeof(cpu_set_t), &cpu_mask);
-	if (ret) {
-		perror("sched_getaffinity");
-		exit(1);
-	}
-	for (i = 0; i < CPU_SETSIZE; i++)
-		if (CPU_ISSET(i, &cpu_mask))
-			max_cpu = i;
-	if (max_cpu == -1) {
-		fprintf(stderr, "sched_getaffinity returned empty mask\n");
-		exit(1);
-	}
-
-	CPU_ZERO(&target_mask);
-
-	worklist = malloc(sizeof(*worklist) * num_threads);
-	memset(worklist, 0, sizeof(*worklist) * num_threads);
-
-	for (i = 0; i < num_threads; i++) {
-		struct lockinfo *l;
-		pthread_t tid;
-		thread_count++;
-		l = worklist + i;
-		if (!l) {
-			perror("malloc");
-			exit(1);
-		}
-		l->id = semid;
-		l->index = sem_num++;
-		l->ops = ops;
-		if (sem_num >= SEMS_PERID) {
-			semid++;
-			sem_num = 0;
-		}
-		ret = pthread_create(&tid, NULL, worker, (void *)l);
-		if (ret) {
-			perror("pthread_create");
-			exit(1);
-		}
-
-		while (!CPU_ISSET(target_cpu, &cpu_mask)) {
-			target_cpu++;
-			if (target_cpu > max_cpu)
-				target_cpu = 0;
-		}
-		CPU_SET(target_cpu, &target_mask);
-		ret = pthread_setaffinity_np(tid, sizeof(cpu_set_t),
-					     &target_mask);
-		CPU_CLR(target_cpu, &target_mask);
-		target_cpu++;
-
-		ret = pthread_detach(tid);
-		if (ret) {
-			perror("pthread_detach");
-			exit(1);
-		}
-	}
-	while(!workers_started) {
-		smp_mb();
-		usleep(200);
-	}
-	gettimeofday(&start, NULL);
-	fprintf(stderr, "main loop going\n");
-	while(1) {
-		ops->wake(wi, num_semids, wake_num);
-		burn_count++;
-		gettimeofday(&now, NULL);
-		if (now.tv_sec - start.tv_sec >= run_secs)
-			break;
-	}
-	fprintf(stderr, "all done\n");
-	all_done = 1;
-	while(thread_count > 0) {
-		ops->wake(wi, num_semids, wake_num);
-		usleep(200);
-	}
-	printf("%d threads, waking %d at a time\n", num_threads, wake_num);
-	printf("using %s\n", ops->name);
-	printf("main thread burns: %d\n", burn_count);
-	printf("worker burn count total %lu min %lu max %lu avg %lu\n",
-	       total_burns, min_burns, max_burns, total_burns / num_threads);
-	printf("run time %d seconds %lu worker burns per second\n",
-		(int)(now.tv_sec - start.tv_sec),
-		total_burns / (now.tv_sec - start.tv_sec));
-	ops->cleanup(num_semids);
-	return 0;
-}
-
diff --git a/drivers/staging/ktap/test/bench/test.sh b/drivers/staging/ktap/test/bench/test.sh
deleted file mode 100644
index 9f77969..0000000
--- a/drivers/staging/ktap/test/bench/test.sh
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/bin/sh
-
-gcc -o sembench sembench.c -O2 -lpthread
-
-COMMAND="./sembench -t 200 -w 20 -r 30 -o 2"
-
-echo -e "\n\t\tPass 1 without tracing"
-$COMMAND
-echo -e "\n\t\tPass 2 without tracing"
-$COMMAND
-echo -e "\n\t\tPass 3 without tracing"
-$COMMAND
-
-echo ""
-
-KTAP_ONE_LINER="trace syscalls:sys_*_futex {}"
-
-echo -e "\n\t\tPass 1 with tracing"
-../../ktap -e "$KTAP_ONE_LINER" -- $COMMAND
-echo -e "\n\t\tPass 2 with tracing"
-../../ktap -e "$KTAP_ONE_LINER" -- $COMMAND
-echo -e "\n\t\tPass 3 with tracing"
-../../ktap -e "$KTAP_ONE_LINER" -- $COMMAND
-
-rm -rf ./sembench
diff --git a/drivers/staging/ktap/test/concat.kp b/drivers/staging/ktap/test/concat.kp
deleted file mode 100644
index be77bb7..0000000
--- a/drivers/staging/ktap/test/concat.kp
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#----------------------------------------#
-
-a = "123"
-b = "456"
-
-if (a..b != "123456") {
-	failed()
-}
diff --git a/drivers/staging/ktap/test/count.kp b/drivers/staging/ktap/test/count.kp
deleted file mode 100644
index 26f962c..0000000
--- a/drivers/staging/ktap/test/count.kp
+++ /dev/null
@@ -1,20 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#---------------------------------------#
-
-t = {}
-
-t["key"] += 1
-if (t["key"] != 1) {
-	failed()
-}
-
-t["key"] += 1
-if (t["key"] != 2) {
-	failed()
-}
diff --git a/drivers/staging/ktap/test/fibonacci.kp b/drivers/staging/ktap/test/fibonacci.kp
deleted file mode 100644
index 7e141da0..0000000
--- a/drivers/staging/ktap/test/fibonacci.kp
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#---------------fibonacci----------------
-
-
-#regular recursive fibonacci
-function fib(n) {
-	if (n < 2) {
-		return n
-	}
-	return fib(n-1) + fib(n-2)
-}
-
-if (fib(20) != 6765) {
-	failed()
-}
-
-#tail recursive fibonacci
-function fib(n) {
-	f = function (iter, res, next) {
-		if (iter == 0) {
-			return res;
-		}
-		return f(iter-1, next, res+next)
-	}
-	return f(n, 0, 1)
-}
-
-if (fib(20) != 6765) {
-	failed()
-}
diff --git a/drivers/staging/ktap/test/function.kp b/drivers/staging/ktap/test/function.kp
deleted file mode 100644
index bfbff26..0000000
--- a/drivers/staging/ktap/test/function.kp
+++ /dev/null
@@ -1,88 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-### basic function call ###
-function f1(a, b) {
-	return a + b
-}
-
-if (f1(2, 3) != 5) {
-	failed();
-}
-
-### return string ###
-function f2() {
-	return "function return"
-}
-
-if (f2() != "function return") {
-	failed();
-}
-
-### mutli-value return ###
-function f3(a, b) {
-	return a+b, a-b;
-}
-
-c, d = f3(2, 3);
-if(c != 5 || d != -1) {
-	failed();
-}
-
-
-### closure testing ### 
-function f4() {
-	f5 = function(a, b) {
-		return a * b
-	}
-	return f5
-}
-
-local f = f4()
-if (f(9, 9) != 81) {
-	failed();
-}
-
-### closure with lexcial variable ### 
-# issue: variable cannot be local
-i = 1
-function f6() {
-	i = 5
-	f7 = function(a, b) {
-		return a * b + i
-	}
-	return f7
-}
-
-f = f6()
-if (f(9, 9) != 81 + i) {
-	failed();
-}
-
-i = 6
-if (f(9, 9) != 81 + i) {
-	failed();
-}
-
-### tail call
-### stack should not overflow in tail call mechanism
-a = 0
-function f8(i) {
-	if (i == 1000000) {
-		a = 1000000
-		return
-	}
-	# must add return here, otherwise stack overflow
-	return f8(i+1)
-}
-
-f8(0)
-if (a != 1000000) {
-	failed();
-}
-
-
diff --git a/drivers/staging/ktap/test/if.kp b/drivers/staging/ktap/test/if.kp
deleted file mode 100644
index 3122084..0000000
--- a/drivers/staging/ktap/test/if.kp
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#-----------------------------------------#
-
-if (false) {
-	failed()
-}
-
-if (nil) {
-	failed()
-}
-
-# ktap only think false and nil is "real false", number 0 is true
-# it's same as lua
-# Might change it in future, to make similar with C
-if (0) {
-	#failed()
-}
-
diff --git a/drivers/staging/ktap/test/kprobe.kp b/drivers/staging/ktap/test/kprobe.kp
deleted file mode 100644
index 022d4a7..0000000
--- a/drivers/staging/ktap/test/kprobe.kp
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/usr/bin/env ktap
-
-n = 0
-trace probe:schedule {
-	n = n + 1
-}
-
-tick-1s {
-	if (n == 0) {
-		printf("failed\n");
-	}
-	exit()
-}
-
diff --git a/drivers/staging/ktap/test/kretprobe.kp b/drivers/staging/ktap/test/kretprobe.kp
deleted file mode 100644
index e311e84..0000000
--- a/drivers/staging/ktap/test/kretprobe.kp
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/usr/bin/env ktap
-
-n = 0
-trace probe:__schedule%return {
-	n = n + 1
-}
-
-tick-1s {
-	if (n == 0) {
-		printf("failed\n");
-	}
-	exit()
-}
-
diff --git a/drivers/staging/ktap/test/len.kp b/drivers/staging/ktap/test/len.kp
deleted file mode 100644
index 697d915..0000000
--- a/drivers/staging/ktap/test/len.kp
+++ /dev/null
@@ -1,25 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#-----------------------------------------#
-
-a = "123456789"
-
-if (len(a) != 9) {
-	failed()
-}
-
-b = {}
-b[0] = 0
-b[1] = 1
-b["keys"] = "values"
-
-if (len(b) != 3) {
-	failed()
-}
-
-
diff --git a/drivers/staging/ktap/test/looping.kp b/drivers/staging/ktap/test/looping.kp
deleted file mode 100644
index fe48051..0000000
--- a/drivers/staging/ktap/test/looping.kp
+++ /dev/null
@@ -1,40 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-### basic while-loop testing
-a = 1
-while (a < 1000) {
-	a = a + 1
-}
-
-if (a != 1000) {
-	failed()
-}
-
-### break testing
-### Note that ktap don't have continue keyword
-a = 1
-while (a < 1000) {
-	if (a == 10) {
-		break
-	}
-	a = a + 1
-}
-
-if (a != 10) {
-	failed()
-}
-
-### for-loop testing
-b=0
-for (c = 0, 1000, 1) {
-	b = b + 1
-}
-
-if (b != 1001) {
-	failed()
-}
diff --git a/drivers/staging/ktap/test/pairs.kp b/drivers/staging/ktap/test/pairs.kp
deleted file mode 100644
index cdf3825..0000000
--- a/drivers/staging/ktap/test/pairs.kp
+++ /dev/null
@@ -1,45 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#-----------------------------------------#
-
-t = {}
-t[1] = 101
-t[2] = 102
-t[3] = 103
-t["key_1"] = "value_1"
-t["key_2"] = "value_2"
-t["key_3"] = "value_3"
-
-local n = 0
-
-for (k, v in pairs(t)) {
-	n = n + 1
-
-	if (k == 1 && v != 101) {
-		failed()
-	}
-	if (k == 2 && v != 102) {
-		failed()
-	}
-	if (k == 3 && v != 103) {
-		failed()
-	}
-	if (k == "key_1" && v != "value_1") {
-		failed()
-	}
-	if (k == "key_2" && v != "value_2") {
-		failed()
-	}
-	if (k == "key_3" && v != "value_3") {
-		failed()
-	}
-}
-
-if (n != len(t)) {
-	failed()
-}
diff --git a/drivers/staging/ktap/test/run_test.sh b/drivers/staging/ktap/test/run_test.sh
deleted file mode 100644
index b98af26..0000000
--- a/drivers/staging/ktap/test/run_test.sh
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/bin/sh
-
-rmmod ktapvm > /dev/null 2>&1
-insmod ../ktapvm.ko
-if test $? -ne 0; then
-	echo "Cannot insmod ../ktapvm.ko"
-	exit -1
-fi
-
-KTAP=../ktap
-function ktaprun {
-	echo "$KTAP $@"
-	$KTAP $@
-}
-
-
-
-#######################################################
-# Use $ktap directly if the arguments contains strings
-$KTAP arg.kp 1 testing "2 3 4"
-$KTAP -e 'print("one-liner testing")'
-$KTAP -e 'exit()'
-$KTAP -o /dev/null -e 'trace syscalls:* { print(argevent) }' \
-		-- ls > /devnull
-
-$KTAP -o /dev/null -e 'trace syscalls:* { print(argevent) }' \
-		-- $KTAP -e 'while (1) {}'
-
-ktaprun arith.kp
-ktaprun concat.kp
-ktaprun count.kp
-ktaprun fibonacci.kp
-ktaprun function.kp
-ktaprun if.kp
-ktaprun kprobe.kp
-ktaprun kretprobe.kp
-ktaprun len.kp
-ktaprun looping.kp
-ktaprun pairs.kp
-ktaprun table.kp
-ktaprun aggr_table.kp
-ktaprun timer.kp
-ktaprun tracepoint.kp
-ktaprun -o /dev/null zerodivide.kp
-ktaprun ansi.kp
-
-echo "testing kill deadloop ktap script"
-$KTAP -e 'while (1) {}' &
-pkill ktap
-sleep 1
-
-#####################################################
-rmmod ktapvm
-if test $? -ne 0; then
-	echo "Error in rmmod ../ktapvm.ko, leak module refcount?"
-	exit -1
-fi
-
diff --git a/drivers/staging/ktap/test/table.kp b/drivers/staging/ktap/test/table.kp
deleted file mode 100644
index 1f6d6e4..0000000
--- a/drivers/staging/ktap/test/table.kp
+++ /dev/null
@@ -1,71 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-### table testing ###
-x = {}
-x[1] = "1"
-if (x[1] != "1") {
-	failed()
-}
-
-x[1] = 22222222222222222222222222222222222222222
-if (x[1] != 22222222222222222222222222222222222222222) {
-	failed()
-}
-
-x[1] = "jovi"
-if (x[1] != "jovi") {
-	failed()
-}
-
-x[11111111111111111111111111111111] = "jovi"
-if (x[11111111111111111111111111111111] != "jovi") {
-	failed()
-}
-
-x["jovi"] = 1
-if (x["jovi"] != 1) {
-	failed()
-}
-
-x["long string....................................."] = 1
-if (x["long string....................................."] != 1) {
-	failed()
-}
-
-# issue: subx must declare firstly, otherwise kernel will oops
-subx = {}
-subx["test"] = "this is test"
-x["test"] = subx
-if (x["test"]["test"] != "this is test") {
-	failed()
-}
-
-tbl = {}
-i = 1
-while (i < 100000) {
-	tbl[i] = i	
-	i = i + 1
-}
-
-i = 1
-while (i < 100000) {
-	if (tbl[i] != i) {
-		failed()
-	}
-	i = i + 1
-}
-
-#### table initization
-days = {"Sunday", "Monday", "Tuesday", "Wednesday",
-	"Thursday", "Friday", "Saturday"}
-
-if (days[2] != "Monday") {
-	failed()
-}
-
-
diff --git a/drivers/staging/ktap/test/timer.kp b/drivers/staging/ktap/test/timer.kp
deleted file mode 100644
index 02e8a61..0000000
--- a/drivers/staging/ktap/test/timer.kp
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#---------------------------------------#
-
-n1 = 0
-n2 = 0
-
-tick-1s {
-	n1 = n1 + 1
-}
-
-tick-1s {
-	n2 = n2 + 1
-}
-
-tick-4s {
-	if (n1 == 0 || n2 == 0) {
-		failed()
-	}
-	exit()
-}
-
-
diff --git a/drivers/staging/ktap/test/tracepoint.kp b/drivers/staging/ktap/test/tracepoint.kp
deleted file mode 100644
index fb036e6..0000000
--- a/drivers/staging/ktap/test/tracepoint.kp
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/usr/bin/env ktap
-
-function failed() {
-	printf("failed\n");
-	exit(-1);
-}
-
-#----------------------------------------#
-
-n = 0
-
-trace sched:* {
-	n = n + 1
-}
-
-tick-1s {
-	if (n == 0) {
-		failed()
-	}
-	exit()
-}
-
diff --git a/drivers/staging/ktap/test/zerodivide.kp b/drivers/staging/ktap/test/zerodivide.kp
deleted file mode 100644
index abb1eae..0000000
--- a/drivers/staging/ktap/test/zerodivide.kp
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/usr/bin/env ktap
-
-a = 1/0
-#should not go here
-printf("Failed\n")
diff --git a/drivers/staging/ktap/userspace/code.c b/drivers/staging/ktap/userspace/code.c
deleted file mode 100644
index 1427fd5..0000000
--- a/drivers/staging/ktap/userspace/code.c
+++ /dev/null
@@ -1,968 +0,0 @@
-/*
- * code.c - Code generator for ktap
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "../include/ktap_types.h"
-#include "../include/ktap_opcodes.h"
-#include "ktapc.h"
-
-
-#define hasjumps(e)	((e)->t != (e)->f)
-
-void codegen_patchtohere (ktap_funcstate *fs, int list);
-
-static int isnumeral(ktap_expdesc *e)
-{
-	return (e->k == VKNUM && e->t == NO_JUMP && e->f == NO_JUMP);
-}
-
-void codegen_nil(ktap_funcstate *fs, int from, int n)
-{
-	ktap_instruction *previous;
-	int l = from + n - 1;  /* last register to set nil */
-
-	if (fs->pc > fs->lasttarget) {  /* no jumps to current position? */
-		previous = &fs->f->code[fs->pc-1];
-		if (GET_OPCODE(*previous) == OP_LOADNIL) {
-			int pfrom = GETARG_A(*previous);
-			int pl = pfrom + GETARG_B(*previous);
-
-			if ((pfrom <= from && from <= pl + 1) ||
-				(from <= pfrom && pfrom <= l + 1)) {  /* can connect both? */
-				if (pfrom < from)
-					from = pfrom;  /* from = min(from, pfrom) */
-				if (pl > l)
-					l = pl;  /* l = max(l, pl) */
-				SETARG_A(*previous, from);
-				SETARG_B(*previous, l - from);
-				return;
-			}
-		}  /* else go through */
-	}
-	codegen_codeABC(fs, OP_LOADNIL, from, n - 1, 0);  /* else no optimization */
-}
-
-int codegen_jump(ktap_funcstate *fs)
-{
-	int jpc = fs->jpc;  /* save list of jumps to here */
-	int j;
-
-	fs->jpc = NO_JUMP;
-	j = codegen_codeAsBx(fs, OP_JMP, 0, NO_JUMP);
-	codegen_concat(fs, &j, jpc);  /* keep them on hold */
-	return j;
-}
-
-void codegen_ret(ktap_funcstate *fs, int first, int nret)
-{
-	codegen_codeABC(fs, OP_RETURN, first, nret+1, 0);
-}
-
-static int condjump(ktap_funcstate *fs, OpCode op, int A, int B, int C)
-{
-	codegen_codeABC(fs, op, A, B, C);
-	return codegen_jump(fs);
-}
-
-static void fixjump(ktap_funcstate *fs, int pc, int dest)
-{
-	ktap_instruction *jmp = &fs->f->code[pc];
-	int offset = dest-(pc+1);
-
-	ktap_assert(dest != NO_JUMP);
-	if (abs(offset) > MAXARG_sBx)
-		lex_syntaxerror(fs->ls, "control structure too long");
-	SETARG_sBx(*jmp, offset);
-}
-
-/*
- * returns current `pc' and marks it as a jump target (to avoid wrong
- * optimizations with consecutive instructions not in the same basic block).
- */
-int codegen_getlabel(ktap_funcstate *fs)
-{
-	fs->lasttarget = fs->pc;
-	return fs->pc;
-}
-
-static int getjump(ktap_funcstate *fs, int pc)
-{
-	int offset = GETARG_sBx(fs->f->code[pc]);
-
-	if (offset == NO_JUMP)  /* point to itself represents end of list */
-		return NO_JUMP;  /* end of list */
-	else
-		return (pc+1)+offset;  /* turn offset into absolute position */
-}
-
-static ktap_instruction *getjumpcontrol(ktap_funcstate *fs, int pc)
-{
-	ktap_instruction *pi = &fs->f->code[pc];
-	if (pc >= 1 && testTMode(GET_OPCODE(*(pi-1))))
-		return pi-1;
-	else
-		return pi;
-}
-
-/*
- * check whether list has any jump that do not produce a value
- * (or produce an inverted value)
- */
-static int need_value(ktap_funcstate *fs, int list)
-{
-	for (; list != NO_JUMP; list = getjump(fs, list)) {
-		ktap_instruction i = *getjumpcontrol(fs, list);
-		if (GET_OPCODE(i) != OP_TESTSET)
-			return 1;
-	}
-	return 0;  /* not found */
-}
-
-static int patchtestreg(ktap_funcstate *fs, int node, int reg)
-{
-	ktap_instruction *i = getjumpcontrol(fs, node);
-	if (GET_OPCODE(*i) != OP_TESTSET)
-		return 0;  /* cannot patch other instructions */
-	if (reg != NO_REG && reg != GETARG_B(*i))
-		SETARG_A(*i, reg);
-	else  /* no register to put value or register already has the value */
-		*i = CREATE_ABC(OP_TEST, GETARG_B(*i), 0, GETARG_C(*i));
-
-	return 1;
-}
-
-static void removevalues(ktap_funcstate *fs, int list)
-{
-	for (; list != NO_JUMP; list = getjump(fs, list))
-		patchtestreg(fs, list, NO_REG);
-}
-
-static void patchlistaux(ktap_funcstate *fs, int list, int vtarget, int reg,
-			 int dtarget)
-{
-	while (list != NO_JUMP) {
-		int next = getjump(fs, list);
-		if (patchtestreg(fs, list, reg))
-			fixjump(fs, list, vtarget);
-		else
-			fixjump(fs, list, dtarget);  /* jump to default target */
-		list = next;
-	}
-}
-
-static void dischargejpc(ktap_funcstate *fs)
-{
-	patchlistaux(fs, fs->jpc, fs->pc, NO_REG, fs->pc);
-	fs->jpc = NO_JUMP;
-}
-
-void codegen_patchlist(ktap_funcstate *fs, int list, int target)
-{
-	if (target == fs->pc)
-		codegen_patchtohere(fs, list);
-	else {
-		ktap_assert(target < fs->pc);
-		patchlistaux(fs, list, target, NO_REG, target);
-	}
-}
-
-void codegen_patchclose(ktap_funcstate *fs, int list, int level)
-{
-	level++;  /* argument is +1 to reserve 0 as non-op */
-	while (list != NO_JUMP) {
-		int next = getjump(fs, list);
-		ktap_assert(GET_OPCODE(fs->f->code[list]) == OP_JMP &&
-			   (GETARG_A(fs->f->code[list]) == 0 ||
-			    GETARG_A(fs->f->code[list]) >= level));
-		SETARG_A(fs->f->code[list], level);
-		list = next;
-	}
-}
-
-void codegen_patchtohere(ktap_funcstate *fs, int list)
-{
-	codegen_getlabel(fs);
-	codegen_concat(fs, &fs->jpc, list);
-}
-
-void codegen_concat(ktap_funcstate *fs, int *l1, int l2)
-{
-	if (l2 == NO_JUMP)
-		return;
-	else if (*l1 == NO_JUMP)
-		*l1 = l2;
-	else {
-		int list = *l1;
-		int next;
-		while ((next = getjump(fs, list)) != NO_JUMP)  /* find last element */
-			list = next;
-		fixjump(fs, list, l2);
-	}
-}
-
-static int codegen_code(ktap_funcstate *fs, ktap_instruction i)
-{
-	ktap_proto *f = fs->f;
-
-	dischargejpc(fs);  /* `pc' will change */
-
-	/* put new instruction in code array */
-	ktapc_growvector(f->code, fs->pc, f->sizecode, ktap_instruction,
-			 MAX_INT, "opcodes");
-	f->code[fs->pc] = i;
-
-	/* save corresponding line information */
-	ktapc_growvector(f->lineinfo, fs->pc, f->sizelineinfo, int,
-			 MAX_INT, "opcodes");
-	f->lineinfo[fs->pc] = fs->ls->lastline;
-	return fs->pc++;
-}
-
-int codegen_codeABC(ktap_funcstate *fs, OpCode o, int a, int b, int c)
-{
-	ktap_assert(getOpMode(o) == iABC);
-	//ktap_assert(getBMode(o) != OpArgN || b == 0);
-	//ktap_assert(getCMode(o) != OpArgN || c == 0);
-	//ktap_assert(a <= MAXARG_A && b <= MAXARG_B && c <= MAXARG_C);
-	return codegen_code(fs, CREATE_ABC(o, a, b, c));
-}
-
-int codegen_codeABx(ktap_funcstate *fs, OpCode o, int a, unsigned int bc)
-{
-	ktap_assert(getOpMode(o) == iABx || getOpMode(o) == iAsBx);
-	ktap_assert(getCMode(o) == OpArgN);
-	ktap_assert(a <= MAXARG_A && bc <= MAXARG_Bx);
-	return codegen_code(fs, CREATE_ABx(o, a, bc));
-}
-
-static int codeextraarg(ktap_funcstate *fs, int a)
-{
-	ktap_assert(a <= MAXARG_Ax);
-	return codegen_code(fs, CREATE_Ax(OP_EXTRAARG, a));
-}
-
-int codegen_codek(ktap_funcstate *fs, int reg, int k)
-{
-	if (k <= MAXARG_Bx)
-		return codegen_codeABx(fs, OP_LOADK, reg, k);
-	else {
-		int p = codegen_codeABx(fs, OP_LOADKX, reg, 0);
-		codeextraarg(fs, k);
-		return p;
-	}
-}
-
-void codegen_checkstack(ktap_funcstate *fs, int n)
-{
-	int newstack = fs->freereg + n;
-
-	if (newstack > fs->f->maxstacksize) {
-		if (newstack >= MAXSTACK)
-			lex_syntaxerror(fs->ls, "function or expression too complex");
-		fs->f->maxstacksize = (u8)(newstack);
-	}
-}
-
-void codegen_reserveregs(ktap_funcstate *fs, int n)
-{
-	codegen_checkstack(fs, n);
-	fs->freereg += n;
-}
-
-static void freereg(ktap_funcstate *fs, int reg)
-{
-	if (!ISK(reg) && reg >= fs->nactvar) {
-		fs->freereg--;
-		ktap_assert(reg == fs->freereg);
-	}
-}
-
-static void freeexp(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	if (e->k == VNONRELOC)
-		freereg(fs, e->u.info);
-}
-
-static int addk(ktap_funcstate *fs, ktap_value *key, ktap_value *v)
-{
-	const ktap_value *idx = ktapc_table_get(fs->h, key);
-	ktap_proto *f = fs->f;
-	ktap_value kn;
-	int k, oldsize;
-
-	if (ttisnumber(idx)) {
-		ktap_number n = nvalue(idx);
-		ktap_number2int(k, n);
-		if (ktapc_equalobj(&f->k[k], v))
-			return k;
-		/* else may be a collision (e.g., between 0.0 and "\0\0\0\0\0\0\0\0");
-			go through and create a new entry for this value */
-	}
-	/* constant not found; create a new entry */
-	oldsize = f->sizek;
-	k = fs->nk;
-
-	/* numerical value does not need GC barrier;
-	   table has no metatable, so it does not need to invalidate cache */
-	setnvalue(&kn, (ktap_number)k);
-	ktapc_table_setvalue(fs->h, key, &kn);
-	ktapc_growvector(f->k, k, f->sizek, ktap_value, MAXARG_Ax, "constants");
-	while (oldsize < f->sizek)
-		setnilvalue(&f->k[oldsize++]);
-	setobj(&f->k[k], v);
-	fs->nk++;
-	return k;
-}
-
-int codegen_stringK(ktap_funcstate *fs, ktap_string *s)
-{
-	ktap_value o;
-
-	setsvalue(&o, s);
-	return addk(fs, &o, &o);
-}
-
-int codegen_numberK(ktap_funcstate *fs, ktap_number r)
-{
-	int n;
-	ktap_value o, s;
-
-	setnvalue(&o, r);
-	if (r == 0 || ktap_numisnan(NULL, r)) {  /* handle -0 and NaN */
-		/* use raw representation as key to avoid numeric problems */
-		setsvalue(&s, ktapc_ts_newlstr((char *)&r, sizeof(r)));
-		//   incr_top(L);
-		n = addk(fs, &s, &o);
-		//   L->top--;
-	} else
-		n = addk(fs, &o, &o);  /* regular case */
-	return n;
-}
-
-static int boolK(ktap_funcstate *fs, int b)
-{
-	ktap_value o;
-	setbvalue(&o, b);
-	return addk(fs, &o, &o);
-}
-
-static int nilK(ktap_funcstate *fs)
-{
-	ktap_value k, v;
-	setnilvalue(&v);
-	/* cannot use nil as key; instead use table itself to represent nil */
-	sethvalue(&k, fs->h);
-	return addk(fs, &k, &v);
-}
-
-void codegen_setreturns(ktap_funcstate *fs, ktap_expdesc *e, int nresults)
-{
-	if (e->k == VCALL) {  /* expression is an open function call? */
-		SETARG_C(getcode(fs, e), nresults+1);
-	}
-	else if (e->k == VVARARG) {
-		SETARG_B(getcode(fs, e), nresults+1);
-		SETARG_A(getcode(fs, e), fs->freereg);
-		codegen_reserveregs(fs, 1);
-	}
-}
-
-void codegen_setoneret(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	if (e->k == VCALL) {  /* expression is an open function call? */
-		e->k = VNONRELOC;
-		e->u.info = GETARG_A(getcode(fs, e));
-	} else if (e->k == VVARARG) {
-		SETARG_B(getcode(fs, e), 2);
-		e->k = VRELOCABLE;  /* can relocate its simple result */
-	}
-}
-
-void codegen_dischargevars(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	switch (e->k) {
-	case VLOCAL: {
-		e->k = VNONRELOC;
-		break;
-	}
-	case VUPVAL: {
-		e->u.info = codegen_codeABC(fs, OP_GETUPVAL, 0, e->u.info, 0);
-		e->k = VRELOCABLE;
-		break;
-	}
-	case VINDEXED: {
-		OpCode op = OP_GETTABUP;  /* assume 't' is in an upvalue */
-		freereg(fs, e->u.ind.idx);
-		if (e->u.ind.vt == VLOCAL) {  /* 't' is in a register? */
-			freereg(fs, e->u.ind.t);
-			op = OP_GETTABLE;
-		}
-		e->u.info = codegen_codeABC(fs, op, 0, e->u.ind.t, e->u.ind.idx);
-		e->k = VRELOCABLE;
-		break;
-	}
-	case VVARARG:
-	case VCALL: {
-		codegen_setoneret(fs, e);
-		break;
-	}
-	default:
-		break;  /* there is one value available (somewhere) */
-	}
-}
-
-static int code_label(ktap_funcstate *fs, int A, int b, int jump)
-{
-	codegen_getlabel(fs);  /* those instructions may be jump targets */
-	return codegen_codeABC(fs, OP_LOADBOOL, A, b, jump);
-}
-
-static void discharge2reg(ktap_funcstate *fs, ktap_expdesc *e, int reg)
-{
-	codegen_dischargevars(fs, e);
-	switch (e->k) {
-	case VNIL: {
-		codegen_nil(fs, reg, 1);
-		break;
-	}
-	case VFALSE:  case VTRUE: {
-		codegen_codeABC(fs, OP_LOADBOOL, reg, e->k == VTRUE, 0);
- 		break;
-	}
-	case VEVENT:
-		codegen_codeABC(fs, OP_EVENT, reg, 0, 0);
-		break;
-	case VEVENTNAME:
-		codegen_codeABC(fs, OP_EVENTNAME, reg, 0, 0);
-		break;
-	case VEVENTARG:
-		codegen_codeABC(fs, OP_EVENTARG, reg, e->u.info, 0);
-		break;
-	case VK: {
-		codegen_codek(fs, reg, e->u.info);
-		break;
-	}
-	case VKNUM: {
-		codegen_codek(fs, reg, codegen_numberK(fs, e->u.nval));
-		break;
-	}
-	case VRELOCABLE: {
-		ktap_instruction *pc = &getcode(fs, e);
-		SETARG_A(*pc, reg);
-		break;
-	}
-	case VNONRELOC: {
-		if (reg != e->u.info)
-			codegen_codeABC(fs, OP_MOVE, reg, e->u.info, 0);
-		break;
-	}
-	default:
-		ktap_assert(e->k == VVOID || e->k == VJMP);
-		return;  /* nothing to do... */
-	}
-
-	e->u.info = reg;
-	e->k = VNONRELOC;
-}
-
-static void discharge2anyreg(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	if (e->k != VNONRELOC) {
-		codegen_reserveregs(fs, 1);
-		discharge2reg(fs, e, fs->freereg-1);
-	}
-}
-
-static void exp2reg(ktap_funcstate *fs, ktap_expdesc *e, int reg)
-{
-	discharge2reg(fs, e, reg);
-	if (e->k == VJMP)
-		codegen_concat(fs, &e->t, e->u.info);  /* put this jump in `t' list */
-	if (hasjumps(e)) {
-		int final;  /* position after whole expression */
-		int p_f = NO_JUMP;  /* position of an eventual LOAD false */
-		int p_t = NO_JUMP;  /* position of an eventual LOAD true */
-
-		if (need_value(fs, e->t) || need_value(fs, e->f)) {
-			int fj = (e->k == VJMP) ? NO_JUMP : codegen_jump(fs);
-
-			p_f = code_label(fs, reg, 0, 1);
-			p_t = code_label(fs, reg, 1, 0);
-			codegen_patchtohere(fs, fj);
-		}
-		final = codegen_getlabel(fs);
-		patchlistaux(fs, e->f, final, reg, p_f);
-		patchlistaux(fs, e->t, final, reg, p_t);
-	}
-	e->f = e->t = NO_JUMP;
-	e->u.info = reg;
-	e->k = VNONRELOC;
-}
-
-void codegen_exp2nextreg(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	codegen_dischargevars(fs, e);
-	freeexp(fs, e);
-	codegen_reserveregs(fs, 1);
-	exp2reg(fs, e, fs->freereg - 1);
-}
-
-int codegen_exp2anyreg(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	codegen_dischargevars(fs, e);
-	if (e->k == VNONRELOC) {
-		if (!hasjumps(e))
-			return e->u.info;  /* exp is already in a register */
-		if (e->u.info >= fs->nactvar) {  /* reg. is not a local? */
-			exp2reg(fs, e, e->u.info);  /* put value on it */
-			return e->u.info;
-		}
-	}
-	codegen_exp2nextreg(fs, e);  /* default */
-	return e->u.info;
-}
-
-void codegen_exp2anyregup(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	if (e->k != VUPVAL || hasjumps(e))
-		codegen_exp2anyreg(fs, e);
-}
-
-void codegen_exp2val(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	if (hasjumps(e))
-		codegen_exp2anyreg(fs, e);
-	else
-		codegen_dischargevars(fs, e);
-}
-
-int codegen_exp2RK(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	codegen_exp2val(fs, e);
-	switch (e->k) {
-	case VTRUE:
-	case VFALSE:
-	case VNIL: {
-		if (fs->nk <= MAXINDEXRK) {  /* constant fits in RK operand? */
-			e->u.info = (e->k == VNIL) ? nilK(fs) :
-						     boolK(fs, (e->k == VTRUE));
-			e->k = VK;
-			return RKASK(e->u.info);
-		}
-		else
-			break;
-	}
-	case VKNUM: {
-		e->u.info = codegen_numberK(fs, e->u.nval);
-		e->k = VK;
-		/* go through */
-	}
-	case VK: {
-		if (e->u.info <= MAXINDEXRK)  /* constant fits in argC? */
-			return RKASK(e->u.info);
-		else
-			break;
-	}
-	default:
-		break;
-	}
-	/* not a constant in the right range: put it in a register */
-	return codegen_exp2anyreg(fs, e);
-}
-
-void codegen_storevar(ktap_funcstate *fs, ktap_expdesc *var, ktap_expdesc *ex)
-{
-	switch (var->k) {
-	case VLOCAL: {
-		freeexp(fs, ex);
-		exp2reg(fs, ex, var->u.info);
-		return;
-	}
-	case VUPVAL: {
-		int e = codegen_exp2anyreg(fs, ex);
-		codegen_codeABC(fs, OP_SETUPVAL, e, var->u.info, 0);
-		break;
-	}
-	case VINDEXED: {
-		OpCode op = (var->u.ind.vt == VLOCAL) ? OP_SETTABLE : OP_SETTABUP;
-		int e = codegen_exp2RK(fs, ex);
-		codegen_codeABC(fs, op, var->u.ind.t, var->u.ind.idx, e);
-		break;
-	}
-	default:
-		ktap_assert(0);  /* invalid var kind to store */
-		break;
-	}
-
-	freeexp(fs, ex);
-}
-
-void codegen_storeincr(ktap_funcstate *fs, ktap_expdesc *var, ktap_expdesc *ex)
-{
-	switch (var->k) {
-#if 0 /*current not supported */
-	case VLOCAL: {
-		freeexp(fs, ex);
-		exp2reg(fs, ex, var->u.info);
-		return;
-	}
-	case VUPVAL: {
-		int e = codegen_exp2anyreg(fs, ex);
-		codegen_codeABC(fs, OP_SETUPVAL, e, var->u.info, 0);
-		break;
-	}
-#endif
-	case VINDEXED: {
-		OpCode op = (var->u.ind.vt == VLOCAL) ? OP_SETTABLE_INCR :
-				OP_SETTABUP_INCR;
-		int e = codegen_exp2RK(fs, ex);
-		codegen_codeABC(fs, op, var->u.ind.t, var->u.ind.idx, e);
-		break;
-	}
-	default:
-		ktap_assert(0);  /* invalid var kind to store */
-		break;
-	}
-
-	freeexp(fs, ex);
-}
-
-
-void codegen_self(ktap_funcstate *fs, ktap_expdesc *e, ktap_expdesc *key)
-{
-	int ereg;
-
-	codegen_exp2anyreg(fs, e);
-	ereg = e->u.info;  /* register where 'e' was placed */
-	freeexp(fs, e);
-	e->u.info = fs->freereg;  /* base register for op_self */
-	e->k = VNONRELOC;
-	codegen_reserveregs(fs, 2);  /* function and 'self' produced by op_self */
-	codegen_codeABC(fs, OP_SELF, e->u.info, ereg, codegen_exp2RK(fs, key));
-	freeexp(fs, key);
-}
-
-static void invertjump(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	ktap_instruction *pc = getjumpcontrol(fs, e->u.info);
-	ktap_assert(testTMode(GET_OPCODE(*pc)) && GET_OPCODE(*pc) != OP_TESTSET &&
-			GET_OPCODE(*pc) != OP_TEST);
-	SETARG_A(*pc, !(GETARG_A(*pc)));
-}
-
-static int jumponcond(ktap_funcstate *fs, ktap_expdesc *e, int cond)
-{
-	if (e->k == VRELOCABLE) {
-		ktap_instruction ie = getcode(fs, e);
-		if (GET_OPCODE(ie) == OP_NOT) {
-			fs->pc--;  /* remove previous OP_NOT */
-			return condjump(fs, OP_TEST, GETARG_B(ie), 0, !cond);
-		}
-		/* else go through */
-	}
-	discharge2anyreg(fs, e);
-	freeexp(fs, e);
-	return condjump(fs, OP_TESTSET, NO_REG, e->u.info, cond);
-}
-
-void codegen_goiftrue(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	int pc;  /* pc of last jump */
-
-	codegen_dischargevars(fs, e);
-	switch (e->k) {
-	case VJMP: {
-		invertjump(fs, e);
-		pc = e->u.info;
-		break;
-	}
-	case VK: case VKNUM: case VTRUE: {
-		pc = NO_JUMP;  /* always true; do nothing */
-		break;
-	}
-	default:
-		pc = jumponcond(fs, e, 0);
-		break;
-	}
-
-	codegen_concat(fs, &e->f, pc);  /* insert last jump in `f' list */
-	codegen_patchtohere(fs, e->t);
-	e->t = NO_JUMP;
-}
-
-void codegen_goiffalse(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	int pc;  /* pc of last jump */
-	codegen_dischargevars(fs, e);
-
-	switch (e->k) {
-	case VJMP: {
-		pc = e->u.info;
-		break;
-	}
-	case VNIL: case VFALSE: {
-		pc = NO_JUMP;  /* always false; do nothing */
- 		break;
-	}
-	default:
-		pc = jumponcond(fs, e, 1);
-		break;
-	}
-	codegen_concat(fs, &e->t, pc);  /* insert last jump in `t' list */
-	codegen_patchtohere(fs, e->f);
-	e->f = NO_JUMP;
-}
-
-static void codenot(ktap_funcstate *fs, ktap_expdesc *e)
-{
-	codegen_dischargevars(fs, e);
-	switch (e->k) {
-	case VNIL: case VFALSE: {
-		e->k = VTRUE;
-		break;
-	}
-	case VK: case VKNUM: case VTRUE: {
-		e->k = VFALSE;
-		break;
-	}
-	case VJMP: {
-		invertjump(fs, e);
-		break;
-	}
-	case VRELOCABLE:
-	case VNONRELOC: {
-		discharge2anyreg(fs, e);
-		freeexp(fs, e);
-		e->u.info = codegen_codeABC(fs, OP_NOT, 0, e->u.info, 0);
-		e->k = VRELOCABLE;
-		break;
-	}
-	default:
-		ktap_assert(0);  /* cannot happen */
-		break;
-	}
-
-	/* interchange true and false lists */
-	{ int temp = e->f; e->f = e->t; e->t = temp; }
-	removevalues(fs, e->f);
-	removevalues(fs, e->t);
-}
-
-void codegen_indexed(ktap_funcstate *fs, ktap_expdesc *t, ktap_expdesc *k)
-{
-	ktap_assert(!hasjumps(t));
-	t->u.ind.t = t->u.info;
-	t->u.ind.idx = codegen_exp2RK(fs, k);
-	t->u.ind.vt = (t->k == VUPVAL) ? VUPVAL
-			: check_exp(vkisinreg(t->k), VLOCAL);
-	t->k = VINDEXED;
-}
-
-static int constfolding(OpCode op, ktap_expdesc *e1, ktap_expdesc *e2)
-{
-	ktap_number r;
-
-	if (!isnumeral(e1) || !isnumeral(e2))
-		return 0;
-
-	if ((op == OP_DIV || op == OP_MOD) && e2->u.nval == 0)
-		return 0;  /* do not attempt to divide by 0 */
-
-	if (op == OP_POW)
-		return 0; /* ktap current do not suppor pow arith */
-
-	r = ktapc_arith(op - OP_ADD + KTAP_OPADD, e1->u.nval, e2->u.nval);
-	e1->u.nval = r;
-	return 1;
-}
-
-static void codearith(ktap_funcstate *fs, OpCode op,
-		      ktap_expdesc *e1, ktap_expdesc *e2, int line)
-{
-	if (constfolding(op, e1, e2))
-		return;
-	else {
-		int o2 = (op != OP_UNM && op != OP_LEN) ? codegen_exp2RK(fs, e2) : 0;
-		int o1 = codegen_exp2RK(fs, e1);
-
-		if (o1 > o2) {
-			freeexp(fs, e1);
-			freeexp(fs, e2);
-		} else {
-			freeexp(fs, e2);
-			freeexp(fs, e1);
-		}
-		e1->u.info = codegen_codeABC(fs, op, 0, o1, o2);
-		e1->k = VRELOCABLE;
-		codegen_fixline(fs, line);
-	}
-}
-
-static void codecomp(ktap_funcstate *fs, OpCode op, int cond, ktap_expdesc *e1,
-		     ktap_expdesc *e2)
-{
-	int o1 = codegen_exp2RK(fs, e1);
-	int o2 = codegen_exp2RK(fs, e2);
-
-	freeexp(fs, e2);
-	freeexp(fs, e1);
-	if (cond == 0 && op != OP_EQ) {
-		int temp;  /* exchange args to replace by `<' or `<=' */
-		temp = o1; o1 = o2; o2 = temp;  /* o1 <==> o2 */
-		cond = 1;
-	}
-	e1->u.info = condjump(fs, op, cond, o1, o2);
-	e1->k = VJMP;
-}
-
-void codegen_prefix(ktap_funcstate *fs, UnOpr op, ktap_expdesc *e, int line)
-{
-	ktap_expdesc e2;
-
-	e2.t = e2.f = NO_JUMP;
-	e2.k = VKNUM;
-	e2.u.nval = 0;
-
-	switch (op) {
-	case OPR_MINUS: {
-		if (isnumeral(e))  /* minus constant? */
-			e->u.nval = ktap_numunm(e->u.nval);  /* fold it */
-		else {
-			codegen_exp2anyreg(fs, e);
-			codearith(fs, OP_UNM, e, &e2, line);
-		}
-		break;
-	}
-	case OPR_NOT:
-		codenot(fs, e);
-		break;
-	case OPR_LEN: {
-		codegen_exp2anyreg(fs, e);  /* cannot operate on constants */
-		codearith(fs, OP_LEN, e, &e2, line);
-		break;
-	}
-	default:
-		ktap_assert(0);
-	}
-}
-
-void codegen_infix(ktap_funcstate *fs, BinOpr op, ktap_expdesc *v)
-{
-	switch (op) {
-	case OPR_AND: {
-		codegen_goiftrue(fs, v);
-		break;
-	}
-	case OPR_OR: {
-		codegen_goiffalse(fs, v);
-		break;
-	}
-	case OPR_CONCAT: {
-		codegen_exp2nextreg(fs, v);  /* operand must be on the `stack' */
-		break;
-	}
-	case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
-	case OPR_MOD: case OPR_POW: {
-		if (!isnumeral(v)) codegen_exp2RK(fs, v);
-			break;
-	}
-	default:
-		codegen_exp2RK(fs, v);
-		break;
-	}
-}
-
-void codegen_posfix(ktap_funcstate *fs, BinOpr op, ktap_expdesc *e1, ktap_expdesc *e2, int line)
-{
-	switch (op) {
-	case OPR_AND: {
-		ktap_assert(e1->t == NO_JUMP);  /* list must be closed */
-		codegen_dischargevars(fs, e2);
-		codegen_concat(fs, &e2->f, e1->f);
-		*e1 = *e2;
-		break;
-	}
-	case OPR_OR: {
-		ktap_assert(e1->f == NO_JUMP);  /* list must be closed */
-		codegen_dischargevars(fs, e2);
-		codegen_concat(fs, &e2->t, e1->t);
-		*e1 = *e2;
-		break;
-	}
-	case OPR_CONCAT: {
-		codegen_exp2val(fs, e2);
-		if (e2->k == VRELOCABLE && GET_OPCODE(getcode(fs, e2)) == OP_CONCAT) {
-			ktap_assert(e1->u.info == GETARG_B(getcode(fs, e2))-1);
-			freeexp(fs, e1);
-			SETARG_B(getcode(fs, e2), e1->u.info);
-			e1->k = VRELOCABLE; e1->u.info = e2->u.info;
-		} else {
-			codegen_exp2nextreg(fs, e2);  /* operand must be on the 'stack' */
-			codearith(fs, OP_CONCAT, e1, e2, line);
-		}
-		break;
-	}
-	case OPR_ADD: case OPR_SUB: case OPR_MUL: case OPR_DIV:
-	case OPR_MOD: case OPR_POW: {
-		codearith(fs, (OpCode)(op - OPR_ADD + OP_ADD), e1, e2, line);
-		break;
-	}
-	case OPR_EQ: case OPR_LT: case OPR_LE: {
-		codecomp(fs, (OpCode)(op - OPR_EQ + OP_EQ), 1, e1, e2);
-		break;
-	}
-	case OPR_NE: case OPR_GT: case OPR_GE: {
-		codecomp(fs, (OpCode)(op - OPR_NE + OP_EQ), 0, e1, e2);
-		break;
-	}
-	default:
-		ktap_assert(0);
-	}
-}
-
-void codegen_fixline(ktap_funcstate *fs, int line)
-{
-	fs->f->lineinfo[fs->pc - 1] = line;
-}
-
-void codegen_setlist(ktap_funcstate *fs, int base, int nelems, int tostore)
-{
-	int c =  (nelems - 1)/LFIELDS_PER_FLUSH + 1;
-	int b = (tostore == KTAP_MULTRET) ? 0 : tostore;
-
-	ktap_assert(tostore != 0);
-	if (c <= MAXARG_C)
-		codegen_codeABC(fs, OP_SETLIST, base, b, c);
-	else if (c <= MAXARG_Ax) {
-		codegen_codeABC(fs, OP_SETLIST, base, b, 0);
-		codeextraarg(fs, c);
-	} else
-		lex_syntaxerror(fs->ls, "constructor too long");
-	fs->freereg = base + 1;  /* free registers with list values */
-}
-
diff --git a/drivers/staging/ktap/userspace/dump.c b/drivers/staging/ktap/userspace/dump.c
deleted file mode 100644
index 088b08d..0000000
--- a/drivers/staging/ktap/userspace/dump.c
+++ /dev/null
@@ -1,187 +0,0 @@
-/*
- * dump.c - save precompiled ktap chunks
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "../include/ktap_types.h"
-#include "../include/ktap_opcodes.h"
-#include "ktapc.h"
-
-
-typedef struct {
-	ktap_writer writer;
-	void *data;
-	int strip;
-	int status;
-} DumpState;
-
-#define DumpMem(b, n, size, D)	DumpBlock(b, (n)*(size), D)
-#define DumpVar(x, D)		DumpMem(&x, 1, sizeof(x), D)
-
-static void DumpBlock(const void *b, size_t size, DumpState *D)
-{
-	if (D->status == 0)
-		D->status = ((D->writer))(b, size, D->data);
-}
-
-static void DumpChar(int y, DumpState *D)
-{
-	char x = (char)y;
-	DumpVar(x, D);
-}
-
-static void DumpInt(int x, DumpState *D)
-{
-	DumpVar(x, D);
-}
-
-static void DumpNumber(ktap_number x, DumpState *D)
-{
-	DumpVar(x,D);
-}
-
-static void DumpVector(const void *b, int n, size_t size, DumpState *D)
-{
-	DumpInt(n, D);
-	DumpMem(b, n, size, D);
-}
-
-static void DumpString(const ktap_string *s, DumpState *D)
-{
-	if (s == NULL) {
-		int size = 0;
-		DumpVar(size, D);
-	} else {
-		int size = s->tsv.len + 1;		/* include trailing '\0' */
-		DumpVar(size, D);
-		DumpBlock(getstr(s), size * sizeof(char), D);
-	}
-}
-
-#define DumpCode(f, D)	 DumpVector(f->code, f->sizecode, sizeof(ktap_instruction), D)
-
-static void DumpFunction(const ktap_proto *f, DumpState *D);
-
-static void DumpConstants(const ktap_proto *f, DumpState *D)
-{
-	int i, n = f->sizek;
-
-	DumpInt(n, D);
-	for (i = 0; i < n; i++) {
-		const ktap_value* o=&f->k[i];
-		DumpChar(ttypenv(o), D);
-		switch (ttypenv(o)) {
-		case KTAP_TNIL:
-			break;
-		case KTAP_TBOOLEAN:
-			DumpChar(bvalue(o), D);
-			break;
-		case KTAP_TNUMBER:
-			DumpNumber(nvalue(o), D);
-			break;
-		case KTAP_TSTRING:
-			DumpString(rawtsvalue(o), D);
-			break;
-		default:
-			printf("ktap: DumpConstants with unknown vaule type %d\n", ttypenv(o));
-			ktap_assert(0);
-		}
-	}
-	n = f->sizep;
-	DumpInt(n, D);
-	for (i = 0; i < n; i++)
-		DumpFunction(f->p[i], D);
-}
-
-static void DumpUpvalues(const ktap_proto *f, DumpState *D)
-{
-	int i, n = f->sizeupvalues;
-
-	DumpInt(n, D);
-	for (i = 0; i < n; i++) {
-		DumpChar(f->upvalues[i].instack, D);
-		DumpChar(f->upvalues[i].idx, D);
-	}
-}
-
-static void DumpDebug(const ktap_proto *f, DumpState *D)
-{
-	int i,n;
-
-	DumpString((D->strip) ? NULL : f->source, D);
-	n= (D->strip) ? 0 : f->sizelineinfo;
-	DumpVector(f->lineinfo, n, sizeof(int), D);
-	n = (D->strip) ? 0 : f->sizelocvars;
-	DumpInt(n, D);
-
-	for (i = 0; i < n; i++) {
-		DumpString(f->locvars[i].varname, D);
-		DumpInt(f->locvars[i].startpc, D);
-		DumpInt(f->locvars[i].endpc, D);
-	}
-	n = (D->strip) ? 0 : f->sizeupvalues;
-	DumpInt(n, D);
-	for (i = 0; i < n; i++)
-		DumpString(f->upvalues[i].name, D);
-}
-
-static void DumpFunction(const ktap_proto *f, DumpState *D)
-{
-	DumpInt(f->linedefined, D);
-	DumpInt(f->lastlinedefined, D);
-	DumpChar(f->numparams, D);
-	DumpChar(f->is_vararg, D);
-	DumpChar(f->maxstacksize, D);
-	DumpCode(f, D);
-	DumpConstants(f, D);
-	DumpUpvalues(f, D);
-	DumpDebug(f, D);
-}
-
-static void DumpHeader(DumpState *D)
-{
-	u8 h[KTAPC_HEADERSIZE];
-
-	kp_header(h);
-	DumpBlock(h, KTAPC_HEADERSIZE, D);
-}
-
-/*
- * dump ktap function as precompiled chunk
- */
-int ktapc_dump(const ktap_proto *f, ktap_writer w, void *data, int strip)
-{
-	DumpState D;
-
-	D.writer = w;
-	D.data = data;
-	D.strip = strip;
-	D.status = 0;
-	DumpHeader(&D);
-	DumpFunction(f, &D);
-	return D.status;
-}
diff --git a/drivers/staging/ktap/userspace/eventdef.c b/drivers/staging/ktap/userspace/eventdef.c
deleted file mode 100644
index 76a68ac..0000000
--- a/drivers/staging/ktap/userspace/eventdef.c
+++ /dev/null
@@ -1,588 +0,0 @@
-/*
- * eventdef.c - ktap eventdef parser
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <dirent.h>
-#include <fcntl.h>
-
-#include "../include/ktap_types.h"
-#include "../include/ktap_opcodes.h"
-#include "ktapc.h"
-
-static char tracing_events_path[] = "/sys/kernel/debug/tracing/events";
-
-#define IDS_ARRAY_SIZE 4096
-static u8 *ids_array;
-
-#define set_id(id)	\
-	do { \
-		ids_array[id/8] = ids_array[id/8] | (1 << (id%8));	\
-	} while(0)
-
-#define clear_id(id)	\
-	do { \
-		ids_array[id/8] = ids_array[id/8] & ~ (1 << (id%8));	\
-	} while(0)
-
-
-static int get_digit_len(int id)
-{
-	int len = -1;
-
-	if (id < 10)
-		len = 1;
-	else if (id < 100)
-		len = 2;
-	else if (id < 1000)
-		len = 3;
-	else if (id < 10000)
-		len = 4;
-	else if (id < 100000)
-		len = 5;
-
-	return len;
-}
-
-static char *get_idstr(char *filter)
-{
-	char *idstr, *ptr;
-	int total_len = 0;
-	int filter_len;
-	int i;
-
-	filter_len = filter ? strlen(filter) : 0;
-
-	for (i = 0; i < IDS_ARRAY_SIZE*8; i++) {
-		if (ids_array[i/8] & (1 << (i%8)))
-			total_len += get_digit_len(i) + 1;
-	}
-
-	if (!total_len)
-		return NULL;
-
-	idstr = malloc(total_len + filter_len + 1);
-	if (!idstr)
-		return NULL;
-
-	memset(idstr, 0, total_len + filter_len + 1);
-	ptr = idstr;
-	for (i = 0; i < IDS_ARRAY_SIZE*8; i++) {
-		if (ids_array[i/8] & (1 << (i%8))) {
-			char digits[32] = {0};
-			int len;
-
-			sprintf(digits, "%d ", i);
-			len = strlen(digits);
-			strncpy(ptr, digits, len);
-			ptr += len;
-		}
-	}
-
-	if (filter)
-		memcpy(ptr, filter, strlen(filter));
-
-	return idstr;
-}
-
-static int add_event(char *evtid_path)
-{
-	char id_buf[24];
-	int id, fd;
-
-	fd = open(evtid_path, O_RDONLY);
-	if (fd < 0) {
-		/*
-		 * some tracepoint doesn't have id file, like ftrace,
-		 * return success in here, and don't print error.
-		 */
-		verbose_printf("warning: cannot open file %s\n", evtid_path);
-		return 0;
-	}
-
-	if (read(fd, id_buf, sizeof(id_buf)) < 0) {
-		fprintf(stderr, "read file error %s\n", evtid_path);
-		close(fd);
-		return -1;
-	}
-
-	id = atoll(id_buf);
-
-	if (id >= IDS_ARRAY_SIZE * 8) {
-		fprintf(stderr, "tracepoint id(%d) is bigger than %d\n", id,
-				IDS_ARRAY_SIZE * 8);
-		close(fd);
-		return -1;
-	}
-
-	set_id(id);
-
-	close(fd);
-	return 0;
-}
-
-static int add_tracepoint(char *sys_name, char *evt_name)
-{
-	char evtid_path[PATH_MAX] = {0};
-
-
-	snprintf(evtid_path, PATH_MAX, "%s/%s/%s/id", tracing_events_path,
-					sys_name, evt_name);
-	return add_event(evtid_path);
-}
-
-static int add_tracepoint_multi_event(char *sys_name, char *evt_name)
-{
-	char evt_path[PATH_MAX];
-	struct dirent *evt_ent;
-	DIR *evt_dir;
-	int ret = 0;
-
-	snprintf(evt_path, PATH_MAX, "%s/%s", tracing_events_path, sys_name);
-	evt_dir = opendir(evt_path);
-	if (!evt_dir) {
-		perror("Can't open event dir");
-		return -1;
-	}
-
-	while (!ret && (evt_ent = readdir(evt_dir))) {
-		if (!strcmp(evt_ent->d_name, ".")
-		    || !strcmp(evt_ent->d_name, "..")
-		    || !strcmp(evt_ent->d_name, "enable")
-		    || !strcmp(evt_ent->d_name, "filter"))
-			continue;
-
-		if (!strglobmatch(evt_ent->d_name, evt_name))
-			continue;
-
-		ret = add_tracepoint(sys_name, evt_ent->d_name);
-	}
-
-	closedir(evt_dir);
-	return ret;
-}
-
-static int add_tracepoint_event(char *sys_name, char *evt_name)
-{
-	return strpbrk(evt_name, "*?") ?
-	       add_tracepoint_multi_event(sys_name, evt_name) :
-	       add_tracepoint(sys_name, evt_name);
-}
-
-static int add_tracepoint_multi_sys(char *sys_name, char *evt_name)
-{
-	struct dirent *events_ent;
-	DIR *events_dir;
-	int ret = 0;
-
-	events_dir = opendir(tracing_events_path);
-	if (!events_dir) {
-		perror("Can't open event dir");
-		return -1;
-	}
-
-	while (!ret && (events_ent = readdir(events_dir))) {
-		if (!strcmp(events_ent->d_name, ".")
-		    || !strcmp(events_ent->d_name, "..")
-		    || !strcmp(events_ent->d_name, "enable")
-		    || !strcmp(events_ent->d_name, "header_event")
-		    || !strcmp(events_ent->d_name, "header_page"))
-			continue;
-
-		if (!strglobmatch(events_ent->d_name, sys_name))
-			continue;
-
-		ret = add_tracepoint_event(events_ent->d_name,
-					   evt_name);
-	}
-
-	closedir(events_dir);
-	return ret;
-}
-
-static int parse_events_add_tracepoint(char *sys, char *event)
-{
-	if (strpbrk(sys, "*?"))
-		return add_tracepoint_multi_sys(sys, event);
-	else
-		return add_tracepoint_event(sys, event);
-}
-
-enum {
-	KPROBE_EVENT,
-	UPROBE_EVENT,
-};
-
-struct probe_list {
-	struct probe_list *next;
-	int type;
-	int kp_seq;
-	char *probe_event;
-};
-
-static struct probe_list *probe_list_head;
-
-#define KPROBE_EVENTS_PATH "/sys/kernel/debug/tracing/kprobe_events"
-
-static int parse_events_add_kprobe(char *old_event)
-{
-	static int event_seq = 0;
-	struct probe_list *pl;
-	char probe_event[128] = {0};
-	char event_id_path[128] = {0};
-	char *event;
-	char *r;
-	int fd;
-	int ret;
-
-	fd = open(KPROBE_EVENTS_PATH, O_WRONLY);
-	if (fd < 0) {
-		fprintf(stderr, "Cannot open %s\n", KPROBE_EVENTS_PATH);
-		return -1;
-	}
-
-	event = strdup(old_event);
-	r = strstr(event, "%return");
-	if (r) {
-		memset(r, ' ', 7);
-		snprintf(probe_event, 128, "r:kprobes/kp%d %s",
-				event_seq, event);
-	} else
-		snprintf(probe_event, 128, "p:kprobes/kp%d %s",
-				event_seq, event);
-
-	free(event);
-
-	verbose_printf("kprobe event %s\n", probe_event);
-	ret = write(fd, probe_event, strlen(probe_event));
-	if (ret <= 0) {
-		fprintf(stderr, "Cannot write %s to %s\n", probe_event,
-				KPROBE_EVENTS_PATH);
-		close(fd);
-		return -1;
-	}
-
-	close(fd);
-
-	pl = malloc(sizeof(struct probe_list));
-	if (!pl)
-		return -1;
-
-	pl->type = KPROBE_EVENT;
-	pl->kp_seq = event_seq;
-	pl->next = probe_list_head;
-	probe_list_head = pl;
-
-	sprintf(event_id_path, "/sys/kernel/debug/tracing/events/kprobes/kp%d/id",
-			event_seq);
-	ret = add_event(event_id_path);
-	if (ret < 0)
-		return -1;
-
-	event_seq++;
-	return 0;
-}
-
-#define UPROBE_EVENTS_PATH "/sys/kernel/debug/tracing/uprobe_events"
-
-static int parse_events_add_uprobe(char *old_event)
-{
-	static int event_seq = 0;
-	struct probe_list *pl;
-	char probe_event[128] = {0};
-	char event_id_path[128] = {0};
-	char *event;
-	char *r;
-	int fd;
-	int ret;
-
-	fd = open(UPROBE_EVENTS_PATH, O_WRONLY);
-	if (fd < 0) {
-		fprintf(stderr, "Cannot open %s\n", UPROBE_EVENTS_PATH);
-		return -1;
-	}
-
-	event = strdup(old_event);
-	r = strstr(event, "%return");
-	if (r) {
-		memset(r, ' ', 7);
-		snprintf(probe_event, 128, "r:uprobes/kp%d %s",
-				event_seq, event);
-	} else
-		snprintf(probe_event, 128, "p:uprobes/kp%d %s",
-				event_seq, event);
-
-	free(event);
-
-	verbose_printf("uprobe event %s\n", probe_event);
-	ret = write(fd, probe_event, strlen(probe_event));
-	if (ret <= 0) {
-		fprintf(stderr, "Cannot write %s to %s\n", probe_event,
-				UPROBE_EVENTS_PATH);
-		close(fd);
-		return -1;
-	}
-
-	close(fd);
-
-	pl = malloc(sizeof(struct probe_list));
-	if (!pl)
-		return -1;
-
-	pl->type = UPROBE_EVENT;
-	pl->kp_seq = event_seq;
-	pl->next = probe_list_head;
-	probe_list_head = pl;
-
-	sprintf(event_id_path, "/sys/kernel/debug/tracing/events/uprobes/kp%d/id",
-			event_seq);
-	ret = add_event(event_id_path);
-	if (ret < 0)
-		return -1;
-
-	event_seq++;
-	return 0;
-}
-
-static int parse_events_add_probe(char *old_event)
-{
-	char *separator;
-
-	separator = strchr(old_event, ':');
-	if (!separator || (separator == old_event))
-		return parse_events_add_kprobe(old_event);
-	else
-		return parse_events_add_uprobe(old_event);
-}
-
-static int parse_events_add_stapsdt(char *old_event)
-{
-	printf("Currently ktap don't support stapsdt, please waiting\n");
-
-	return -1;
-}
-
-static void strim(char *s)
-{
-	size_t size;
-	char *end;
-
-	size = strlen(s);
-	if (!size)
-		return;
-
-	end = s + size -1;
-	while (end >= s && isspace(*end))
-		end--;
-
-	*(end + 1) = '\0';
-}
-
-static int get_sys_event_filter_str(char *start,
-				    char **sys, char **event, char **filter)
-{
-	char *separator, *separator2, *ptr, *end;
-
-	while (*start == ' ')
-		start++;
-
-	/* find sys */
-	separator = strchr(start, ':');
-	if (!separator || (separator == start)) {
-		return -1;
-	}
-
-	ptr = malloc(separator - start + 1);
-	if (!ptr)
-		return -1;
-
-	strncpy(ptr, start, separator - start);
-	ptr[separator - start] = '\0';
-
-	strim(ptr);
-	*sys = ptr;
-
-	if (!strcmp(*sys, "probe") && (*(separator + 1) == '/')) {
-		/* it's uprobe event */
-		separator2 = strchr(separator + 1, ':');
-		if (!separator2)
-			return -1;
-	} else
-		separator2 = separator;
-
-	/* find filter */
-	end = start + strlen(start);
-	while (*--end == ' ') {
-	}
-
-	if (*end == '/') {
-		char *filter_start;
-
-		filter_start = strchr(separator2, '/');
-		if (filter_start == end)
-			return -1;
-
-		ptr = malloc(end - filter_start + 2);
-		if (!ptr)
-			return -1;
-
-		memcpy(ptr, filter_start, end - filter_start + 1);
-		ptr[end - filter_start + 1] = '\0';
-
-		*filter = ptr;
-
-		end = filter_start;
-	} else {
-		*filter = NULL;
-		end++;
-	}
-
-	/* find event */
-	ptr = malloc(end - separator);
-	if (!ptr)
-		return -1;
-
-	memcpy(ptr, separator + 1, end - separator - 1);
-	ptr[end - separator - 1] = '\0';
-
-	strim(ptr);
-	*event = ptr;
-
-	return 0;
-}
-
-static char *get_next_eventdef(char *str)
-{
-	char *separator;
-
-	separator = strchr(str, ',');
-	if (!separator)
-		return str + strlen(str);
-
-	*separator = '\0';
-	return separator + 1;
-}
-
-ktap_string *ktapc_parse_eventdef(ktap_string *eventdef)
-{
-	const char *def_str = getstr(eventdef);
-	char *str = strdup(def_str);
-	char *sys, *event, *filter, *idstr, *g_idstr, *next;
-	ktap_string *ts;
-	int ret;
-
-	if (!ids_array) {
-		ids_array = malloc(IDS_ARRAY_SIZE);
-		if (!ids_array)
-			return NULL;
-	}
-
-	g_idstr = malloc(4096);
-	if (!g_idstr)
-		return NULL;
-
-	memset(g_idstr, 0, 4096);
-
- parse_next_eventdef:
-	memset(ids_array, 0, IDS_ARRAY_SIZE);
-
-	next = get_next_eventdef(str);
-
-	if (get_sys_event_filter_str(str, &sys, &event, &filter))
-		goto error;
-
-	verbose_printf("parse_eventdef: sys[%s], event[%s], filter[%s]\n",
-		       sys, event, filter);
-
-	if (!strcmp(sys, "probe"))
-		ret = parse_events_add_probe(event);
-	else if (!strcmp(sys, "stapsdt"))
-		ret = parse_events_add_stapsdt(event);
-	else
-		ret = parse_events_add_tracepoint(sys, event);
-
-	if (ret)
-		goto error;
-
-	/* don't trace ftrace:function when all tracepoints enabled */
-	if (!strcmp(sys, "*"))
-		clear_id(1);
-
-	idstr = get_idstr(filter);
-	if (!idstr)
-		goto error;
-
-	str = next;
-
-	g_idstr = strcat(g_idstr, idstr);
-	g_idstr = strcat(g_idstr, ",");
-
-	if (*next != '\0')
-		goto parse_next_eventdef;
-
-	ts = ktapc_ts_new(g_idstr);
-	free(g_idstr);	
-
-	return ts;
- error:
-	cleanup_event_resources();
-	return NULL;
-}
-
-void cleanup_event_resources(void)
-{
-	struct probe_list *pl;
-	const char *path;
-	char probe_event[32] = {0};
-	int fd, ret;
-
-	for (pl = probe_list_head; pl; pl = pl->next) {
-		if (pl->type == KPROBE_EVENT) {
-			path = KPROBE_EVENTS_PATH;
-			snprintf(probe_event, 32, "-:kprobes/kp%d", pl->kp_seq);
-		} else if (pl->type == UPROBE_EVENT) {
-			path = UPROBE_EVENTS_PATH;
-			snprintf(probe_event, 32, "-:uprobes/kp%d", pl->kp_seq);
-		} else {
-			fprintf(stderr, "Cannot cleanup event type %d\n", pl->type);
-			continue;
-		}
-
-		fd = open(path, O_WRONLY);
-		if (fd < 0) {
-			fprintf(stderr, "Cannot open %s\n", UPROBE_EVENTS_PATH);
-			continue;
-		}
-
-		ret = write(fd, probe_event, strlen(probe_event));
-		if (ret <= 0) {
-			fprintf(stderr, "Cannot write %s to %s\n", probe_event,
-					path);
-			close(fd);
-			continue;
-		}
-
-		close(fd);
-	}
-}
-
diff --git a/drivers/staging/ktap/userspace/ktapc.h b/drivers/staging/ktap/userspace/ktapc.h
deleted file mode 100644
index 879cd29..0000000
--- a/drivers/staging/ktap/userspace/ktapc.h
+++ /dev/null
@@ -1,376 +0,0 @@
-/*
- * ktapc.h
- * only can be included by userspace compiler
- */
-
-#include <ctype.h>
-
-typedef int bool;
-#define false 0
-#define true 1
-
-#define MAX_INT         ((int)(~0U>>1))
-#define UCHAR_MAX	255
-
-#define MAX_SIZET  ((size_t)(~(size_t)0)-2)
-
-#define KTAP_ERRSYNTAX 3
-
-/*
- * KTAP_IDSIZE gives the maximum size for the description of the source
- * of a function in debug information.
- * CHANGE it if you want a different size.
- */
-#define KTAP_IDSIZE      60
-
-
-#define FIRST_RESERVED  257
-
-/*
- * maximum depth for nested C calls and syntactical nested non-terminals
- * in a program. (Value must fit in an unsigned short int.)
- */
-#define KTAP_MAXCCALLS          200
-
-#define KTAP_MULTRET     (-1)
-
-
-#define SHRT_MAX	UCHAR_MAX
-
-#define MAXUPVAL   UCHAR_MAX
-
-
-/* maximum stack for a ktap function */
-#define MAXSTACK        250
-
-#define islalpha(c)   (isalpha(c) || (c) == '_')
-#define islalnum(c)   (isalnum(c) || (c) == '_')
-
-#define isreserved(s) ((s)->tsv.tt == KTAP_TSHRSTR && (s)->tsv.extra > 0)
-
-#define ktap_numeq(a,b)		((a)==(b))
-#define ktap_numisnan(L,a)	(!ktap_numeq((a), (a)))
-
-#define ktap_numunm(a)		(-(a))
-
-/*
- * ** Comparison and arithmetic functions
- * */
-
-#define KTAP_OPADD       0       /* ORDER TM */
-#define KTAP_OPSUB       1
-#define KTAP_OPMUL       2
-#define KTAP_OPDIV       3
-#define KTAP_OPMOD       4
-#define KTAP_OPPOW       5
-#define KTAP_OPUNM       6
-
-#define KTAP_OPEQ        0
-#define KTAP_OPLT        1
-#define KTAP_OPLE        2
-
-
-/*
- * WARNING: if you change the order of this enumeration,
- * grep "ORDER RESERVED"
- */
-enum RESERVED {
-	/* terminal symbols denoted by reserved words */
-	TK_TRACE = FIRST_RESERVED, TK_TRACE_END,
-	TK_ARGEVENT, TK_ARGNAME,
-	TK_ARG1, TK_ARG2, TK_ARG3, TK_ARG4, TK_ARG5, TK_ARG6, TK_ARG7, TK_ARG8,
-	TK_ARG9, TK_PROFILE, TK_TICK,
-	TK_AND, TK_BREAK,
-	TK_DO, TK_ELSE, TK_ELSEIF, TK_END, TK_FALSE, TK_FOR, TK_FUNCTION,
-	TK_GOTO, TK_IF, TK_IN, TK_LOCAL, TK_NIL, TK_NOT, TK_OR, TK_REPEAT,
-	TK_RETURN, TK_THEN, TK_TRUE, TK_UNTIL, TK_WHILE,
-	/* other terminal symbols */
-	TK_CONCAT, TK_DOTS, TK_EQ, TK_GE, TK_LE, TK_NE, TK_INCR, TK_DBCOLON,
-	TK_EOS, TK_NUMBER, TK_NAME, TK_STRING
-};
-
-/* number of reserved words */
-#define NUM_RESERVED    ((int)(TK_WHILE-FIRST_RESERVED + 1))
-
-#define EOZ     (0)                    /* end of stream */
-
-typedef union {
-	ktap_number r;
-	ktap_string *ts;
-} ktap_seminfo;  /* semantics information */
-
-
-typedef struct ktap_token {
-	int token;
-	ktap_seminfo seminfo;
-} ktap_token;
-
-typedef struct ktap_mbuffer {
-	char *buffer;
-	size_t n;
-	size_t buffsize;
-} ktap_mbuffer;
-
-#define mbuff_init(buff)	((buff)->buffer = NULL, (buff)->buffsize = 0)
-#define mbuff(buff)		((buff)->buffer)
-#define mbuff_reset(buff)	((buff)->n = 0, memset((buff)->buffer, 0, (buff)->buffsize))
-#define mbuff_len(buff)		((buff)->n)
-#define mbuff_size(buff)	((buff)->buffsize)
-
-#define mbuff_resize(buff, size) \
-	(ktapc_realloc((buff)->buffer, (buff)->buffsize, size, char), \
-	(buff)->buffsize = size)
-
-#define mbuff_free(buff)        mbuff_resize(buff, 0)
-
-
-/*
- * state of the lexer plus state of the parser when shared by all
- * functions
- */
-typedef struct ktap_lexstate {
-	char *ptr; /* source file reading position */
-	int current;  /* current character (charint) */
-	int linenumber;  /* input line counter */
-	int lastline;  /* line of last token `consumed' */
-	ktap_token t;  /* current token */
-	ktap_token lookahead;  /* look ahead token */
-	struct ktap_funcstate *fs;  /* current function (parser) */
-	ktap_mbuffer *buff;  /* buffer for tokens */
-	struct ktap_dyndata *dyd;  /* dynamic structures used by the parser */
-	ktap_string *source;  /* current source name */
-	ktap_string *envn;  /* environment variable name */
-	char decpoint;  /* locale decimal point */
-	int nCcalls;
-} ktap_lexstate;
-
-
-/*
- * Expression descriptor
- */
-typedef enum {
-	VVOID,        /* no value */
-	VNIL,
-	VTRUE,
-	VFALSE,
-	VK,           /* info = index of constant in `k' */
-	VKNUM,        /* nval = numerical value */
-	VNONRELOC,    /* info = result register */
-	VLOCAL,       /* info = local register */
-	VUPVAL,       /* info = index of upvalue in 'upvalues' */
-	VINDEXED,     /* t = table register/upvalue; idx = index R/K */
-	VJMP,         /* info = instruction pc */
-	VRELOCABLE,   /* info = instruction pc */
-	VCALL,        /* info = instruction pc */
-	VVARARG,      /* info = instruction pc */
-	VEVENT,
-	VEVENTNAME,
-	VEVENTARG,
-} expkind;
-
-
-#define vkisvar(k)      (VLOCAL <= (k) && (k) <= VINDEXED)
-#define vkisinreg(k)    ((k) == VNONRELOC || (k) == VLOCAL)
-
-typedef struct ktap_expdesc {
-	expkind k;
-	union {
-		struct {  /* for indexed variables (VINDEXED) */
-			short idx;  /* index (R/K) */
-			u8 t;  /* table (register or upvalue) */
-			u8 vt;  /* whether 't' is register (VLOCAL) or upvalue (VUPVAL) */
-		} ind;
-		int info;  /* for generic use */
-		ktap_number nval;  /* for VKNUM */
-	} u;
-	int t;  /* patch list of `exit when true' */
-	int f;  /* patch list of `exit when false' */
-} ktap_expdesc;
-
-
-typedef struct ktap_vardesc {
-	short idx;  /* variable index in stack */
-} ktap_vardesc;
-
-
-/* description of pending goto statements and label statements */
-typedef struct ktap_labeldesc {
-	ktap_string *name;  /* label identifier */
-	int pc;  /* position in code */
-	int line;  /* line where it appeared */
-	u8 nactvar;  /* local level where it appears in current block */
-} ktap_labeldesc;
-
-
-/* list of labels or gotos */
-typedef struct ktap_labellist {
-	ktap_labeldesc *arr;  /* array */
-	int n;  /* number of entries in use */
-	int size;  /* array size */
-} ktap_labellist;
-
-
-/* dynamic structures used by the parser */
-typedef struct ktap_dyndata {
-	struct {  /* list of active local variables */
-		ktap_vardesc *arr;
-		int n;
-		int size;
-	} actvar;
-	ktap_labellist gt;  /* list of pending gotos */
-	ktap_labellist label;   /* list of active labels */
-} ktap_dyndata;
-
-
-/* control of blocks */
-struct ktap_blockcnt;  /* defined in lparser.c */
-
-
-/* state needed to generate code for a given function */
-typedef struct ktap_funcstate {
-	ktap_proto *f;  /* current function header */
-	ktap_table *h;  /* table to find (and reuse) elements in `k' */
-	struct ktap_funcstate *prev;  /* enclosing function */
-	struct ktap_lexstate *ls;  /* lexical state */
-	struct ktap_blockcnt *bl;  /* chain of current blocks */
-	int pc;  /* next position to code (equivalent to `ncode') */
-	int lasttarget;   /* 'label' of last 'jump label' */
-	int jpc;  /* list of pending jumps to `pc' */
-	int nk;  /* number of elements in `k' */
-	int np;  /* number of elements in `p' */
-	int firstlocal;  /* index of first local var (in ktap_dyndata array) */
-	short nlocvars;  /* number of elements in 'f->locvars' */
-	u8 nactvar;  /* number of active local variables */
-	u8 nups;  /* number of upvalues */
-	u8 freereg;  /* first free register */
-} ktap_funcstate;
-
-
-/*
- * Marks the end of a patch list. It is an invalid value both as an absolute
- * address, and as a list link (would link an element to itself).
- */
-#define NO_JUMP (-1)
-
-
-/*
- * grep "ORDER OPR" if you change these enums  (ORDER OP)
- */
-typedef enum BinOpr {
-	OPR_ADD, OPR_SUB, OPR_MUL, OPR_DIV, OPR_MOD, OPR_POW,
-	OPR_CONCAT,
-	OPR_EQ, OPR_LT, OPR_LE,
-	OPR_NE, OPR_GT, OPR_GE,
-	OPR_AND, OPR_OR,
-	OPR_NOBINOPR
-} BinOpr;
-
-
-typedef enum UnOpr { OPR_MINUS, OPR_NOT, OPR_LEN, OPR_NOUNOPR } UnOpr;
-
-
-#define getcode(fs,e)   ((fs)->f->code[(e)->u.info])
-
-#define codegen_codeAsBx(fs,o,A,sBx)       codegen_codeABx(fs,o,A,(sBx)+MAXARG_sBx)
-
-#define codegen_setmultret(fs,e)   codegen_setreturns(fs, e, KTAP_MULTRET)
-
-#define codegen_jumpto(fs,t)       codegen_patchlist(fs, codegen_jump(fs), t)
-
-
-#define ktapc_realloc(v, osize, nsize, t) \
-        ((v) = (t *)ktapc_reallocv(v, osize * sizeof(t), nsize * sizeof(t)))
-
-#define ktapc_reallocvector(v,oldn,n,t)	ktapc_realloc(v,oldn,n,t)
-
-
-#define ktapc_growvector(v,nelems,size,t,limit,e) \
-          if ((nelems)+1 > (size)) \
-            ((v)=(t *)ktapc_growaux(v,&(size),sizeof(t),limit,e))
-
-
-void lex_init();
-ktap_string *lex_newstring(ktap_lexstate *ls, const char *str, size_t l);
-const char *lex_token2str(ktap_lexstate *ls, int token);
-void lex_syntaxerror(ktap_lexstate *ls, const char *msg);
-void lex_setinput(ktap_lexstate *ls, char *ptr, ktap_string *source, int firstchar);
-void lex_next(ktap_lexstate *ls);
-int lex_lookahead(ktap_lexstate *ls);
-void lex_read_string_until(ktap_lexstate *ls, int c);
-ktap_closure *ktapc_parser(char *pos, const char *name);
-ktap_string *ktapc_ts_new(const char *str);
-int ktapc_ts_eqstr(ktap_string *a, ktap_string *b);
-ktap_string *ktapc_ts_newlstr(const char *str, size_t l);
-ktap_proto *ktapc_newproto();
-ktap_table *ktapc_table_new();
-const ktap_value *ktapc_table_get(ktap_table *t, const ktap_value *key);
-void ktapc_table_setvalue(ktap_table *t, const ktap_value *key, ktap_value *val);
-ktap_closure *ktapc_newlclosure(int n);
-char *ktapc_sprintf(const char *fmt, ...);
-
-void *ktapc_reallocv(void *block, size_t osize, size_t nsize);
-void *ktapc_growaux(void *block, int *size, size_t size_elems, int limit,
-		    const char *what);
-
-void ktapio_exit(void);
-int ktapio_create(const char *output_filename);
-
-ktap_string *ktapc_parse_eventdef(ktap_string *eventdef);
-void cleanup_event_resources(void);
-
-extern int verbose;
-#define verbose_printf(...) \
-	if (verbose)	\
-		printf("[verbose] " __VA_ARGS__);
-
-#define ktapc_equalobj(t1, t2)	kp_equalobjv(NULL, t1, t2)
-
-
-#include "../include/ktap_opcodes.h"
-
-int codegen_stringK(ktap_funcstate *fs, ktap_string *s);
-void codegen_indexed(ktap_funcstate *fs, ktap_expdesc *t, ktap_expdesc *k);
-void codegen_setreturns(ktap_funcstate *fs, ktap_expdesc *e, int nresults);
-void codegen_reserveregs(ktap_funcstate *fs, int n);
-void codegen_exp2nextreg(ktap_funcstate *fs, ktap_expdesc *e);
-void codegen_nil(ktap_funcstate *fs, int from, int n);
-void codegen_patchlist(ktap_funcstate *fs, int list, int target);
-void codegen_patchclose(ktap_funcstate *fs, int list, int level);
-int codegen_jump(ktap_funcstate *fs);
-void codegen_patchtohere(ktap_funcstate *fs, int list);
-int codegen_codeABx(ktap_funcstate *fs, OpCode o, int a, unsigned int bc);
-void codegen_ret(ktap_funcstate *fs, int first, int nret);
-void codegen_exp2anyregup(ktap_funcstate *fs, ktap_expdesc *e);
-void codegen_exp2val(ktap_funcstate *fs, ktap_expdesc *e);
-int codegen_exp2RK(ktap_funcstate *fs, ktap_expdesc *e);
-int codegen_codeABC(ktap_funcstate *fs, OpCode o, int a, int b, int c);
-void codegen_setlist(ktap_funcstate *fs, int base, int nelems, int tostore);
-void codegen_fixline (ktap_funcstate *fs, int line);
-void codegen_dischargevars(ktap_funcstate *fs, ktap_expdesc *e);
-void codegen_self(ktap_funcstate *fs, ktap_expdesc *e, ktap_expdesc *key);
-void codegen_prefix(ktap_funcstate *fs, UnOpr op, ktap_expdesc *e, int line);
-void codegen_infix(ktap_funcstate *fs, BinOpr op, ktap_expdesc *v);
-void codegen_posfix(ktap_funcstate *fs, BinOpr op, ktap_expdesc *e1, ktap_expdesc *e2, int line);
-void codegen_setoneret(ktap_funcstate *fs, ktap_expdesc *e);
-void codegen_storevar(ktap_funcstate *fs, ktap_expdesc *var, ktap_expdesc *ex);
-void codegen_storeincr(ktap_funcstate *fs, ktap_expdesc *var, ktap_expdesc *ex);
-void codegen_goiftrue(ktap_funcstate *fs, ktap_expdesc *e);
-int codegen_getlabel(ktap_funcstate *fs);
-int codegen_codek(ktap_funcstate *fs, int reg, int k);
-int codegen_numberK(ktap_funcstate *fs, ktap_number r);
-void codegen_checkstack(ktap_funcstate *fs, int n);
-void codegen_goiffalse(ktap_funcstate *fs, ktap_expdesc *e);
-void codegen_concat(ktap_funcstate *fs, int *l1, int l2);
-int codegen_exp2anyreg(ktap_funcstate *fs, ktap_expdesc *e);
-
-typedef int (*ktap_writer)(const void* p, size_t sz, void* ud);
-int ktapc_dump(const ktap_proto *f, ktap_writer w, void *data, int strip);
-
-void ktapc_chunkid(char *out, const char *source, size_t bufflen);
-int ktapc_str2d(const char *s, size_t len, ktap_number *result);
-int ktapc_hexavalue(int c);
-ktap_number ktapc_arith(int op, ktap_number v1, ktap_number v2);
-int ktapc_int2fb(unsigned int x);
-
-bool strglobmatch(const char *str, const char *pat);
-
diff --git a/drivers/staging/ktap/userspace/ktapio.c b/drivers/staging/ktap/userspace/ktapio.c
deleted file mode 100644
index f9bcab4..0000000
--- a/drivers/staging/ktap/userspace/ktapio.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
- * ktapio.c - ring buffer transport in userspace
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <sys/poll.h>
-#include <sys/signal.h>
-#include <fcntl.h>
-#include <pthread.h>
-
-#define MAX_BUFLEN  131072
-#define PATH_MAX 128
-
-#define handle_error(str) do { perror(str); exit(-1); } while(0)
-
-extern pid_t ktap_pid;
-
-void sigfunc(int signo)
-{
-	/* should not not reach here */
-}
-
-static void block_sigint()
-{
-	sigset_t mask;
-
-	sigemptyset(&mask);
-	sigaddset(&mask, SIGINT);
-
-	pthread_sigmask(SIG_BLOCK, &mask, NULL);
-}
-
-static void *reader_thread(void *data)
-{
-	char buf[MAX_BUFLEN];
-	char filename[PATH_MAX];
-	const char *output = data; 
-	int failed = 0, fd, out_fd, len;
-
-	block_sigint();
-
-	if (output) {
-		out_fd = open(output, O_CREAT | O_WRONLY | O_TRUNC,
-					S_IRUSR|S_IWUSR);
-		if (out_fd < 0) {
-			fprintf(stderr, "Cannot open output file %s\n", output);
-			return NULL;
-		}
-	} else
-		out_fd = 2;
-
-	sprintf(filename, "/sys/kernel/debug/ktap/trace_pipe_%d", ktap_pid);
-
- open_again:
-	fd = open(filename, O_RDONLY);
-	if (fd < 0) {
-		usleep(10000);
-
-		if (failed++ == 10) {
-			fprintf(stderr, "Cannot open file %s\n", filename);
-			return NULL;
-		}
-		goto open_again;
-	}
-
-	while ((len = read(fd, buf, sizeof(buf))) > 0)
-		write(out_fd, buf, len);
-
-	close(fd);
-	close(out_fd);
-
-	return NULL;
-}
-
-int ktapio_create(const char *output)
-{
-	pthread_t reader;
-
-	signal(SIGINT, sigfunc);
-
-	if (pthread_create(&reader, NULL, reader_thread, (void *)output) < 0)
-		handle_error("pthread_create reader_thread failed\n");
-
-	return 0;
-}
-
diff --git a/drivers/staging/ktap/userspace/lex.c b/drivers/staging/ktap/userspace/lex.c
deleted file mode 100644
index 484dd7f..0000000
--- a/drivers/staging/ktap/userspace/lex.c
+++ /dev/null
@@ -1,622 +0,0 @@
-/*
- * lex.c - ktap lexical analyzer
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <locale.h>
-#include "../include/ktap_types.h"
-#include "ktapc.h"
-
-#define next(ls) (ls->current = *ls->ptr++)
-
-#define currIsNewline(ls)	(ls->current == '\n' || ls->current == '\r')
-
-#define KTAP_MINBUFFER   32
-
-/* ORDER RESERVED */
-static const char *const ktap_tokens [] = {
-	"trace", "trace_end", "argevent", "argname",
-	"arg1", "arg2", "arg3", "arg4", "arg5", "arg6", "arg7", "arg9", "arg9",
-	"profile", "tick",
-	"and", "break", "do", "else", "elseif",
-	"end", "false", "for", "function", "goto", "if",
-	"in", "local", "nil", "not", "or", "repeat",
-	"return", "then", "true", "until", "while",
-	"..", "...", "==", ">=", "<=", "!=", "+=", "::", "<eof>",
-	"<number>", "<name>", "<string>"
-};
-
-#define save_and_next(ls) (save(ls, ls->current), next(ls))
-
-static void lexerror(ktap_lexstate *ls, const char *msg, int token);
-
-static void save(ktap_lexstate *ls, int c)
-{
-	ktap_mbuffer *b = ls->buff;
-	if (mbuff_len(b) + 1 > mbuff_size(b)) {
-		size_t newsize;
-		if (mbuff_size(b) >= MAX_SIZET / 2)
-			lexerror(ls, "lexical element too long", 0);
-		newsize = mbuff_size(b) * 2;
-		mbuff_resize(b, newsize);
-	}
-	b->buffer[mbuff_len(b)++] = (char)c;
-}
-
-void lex_init()
-{
-	int i;
-	for (i = 0; i < NUM_RESERVED; i++) {
-		ktap_string *ts = ktapc_ts_new(ktap_tokens[i]);
-		ts->tsv.extra = (u8)(i+1);  /* reserved word */
-	}
-}
-
-const char *lex_token2str(ktap_lexstate *ls, int token)
-{
-	if (token < FIRST_RESERVED) {
-		ktap_assert(token == (unsigned char)token);
-		return (isprint(token)) ? ktapc_sprintf(KTAP_QL("%c"), token) :
-			ktapc_sprintf("char(%d)", token);
-	} else {
-		const char *s = ktap_tokens[token - FIRST_RESERVED];
-		if (token < TK_EOS)
-			return ktapc_sprintf(KTAP_QS, s);
-		else
-			return s;
-	}
-}
-
-static const char *txtToken(ktap_lexstate *ls, int token)
-{
-	switch (token) {
-	case TK_NAME:
-	case TK_STRING:
-	case TK_NUMBER:
-		save(ls, '\0');
-		return ktapc_sprintf(KTAP_QS, mbuff(ls->buff));
-	default:
-		return lex_token2str(ls, token);
-	}
-}
-
-static void lexerror(ktap_lexstate *ls, const char *msg, int token)
-{
-	char buff[KTAP_IDSIZE];
-	char *newmsg;
-
-	ktapc_chunkid(buff, getstr(ls->source), KTAP_IDSIZE);
-	newmsg = ktapc_sprintf("%s:%d: %s", buff, ls->linenumber, msg);
-	if (token)
-		newmsg = ktapc_sprintf("%s near %s", newmsg, txtToken(ls, token));
-	printf("lexerror: %s\n", newmsg);
-	exit(EXIT_FAILURE);
-}
-
-void lex_syntaxerror(ktap_lexstate *ls, const char *msg)
-{
-	lexerror(ls, msg, ls->t.token);
-}
-
-/*
- * creates a new string and anchors it in function's table so that
- * it will not be collected until the end of the function's compilation
- * (by that time it should be anchored in function's prototype)
- */
-ktap_string *lex_newstring(ktap_lexstate *ls, const char *str, size_t l)
-{
-	const ktap_value *o;  /* entry for `str' */
-	ktap_value val;  /* entry for `str' */
-	ktap_value tsv;
-	ktap_string *ts = ktapc_ts_newlstr(str, l);  /* create new string */
-	setsvalue(&tsv, ts); 
-	o = ktapc_table_get(ls->fs->h, &tsv);
-	if (ttisnil(o)) {  /* not in use yet? (see 'addK') */
-		/* boolean value does not need GC barrier;
-		table has no metatable, so it does not need to invalidate cache */
-		setbvalue(&val, 1);  /* t[string] = true */
-		ktapc_table_setvalue(ls->fs->h, &tsv, &val);
-	}
-	return ts;
-}
-
-/*
- * increment line number and skips newline sequence (any of
- * \n, \r, \n\r, or \r\n)
- */
-static void inclinenumber(ktap_lexstate *ls)
-{
-	int old = ls->current;
-	ktap_assert(currIsNewline(ls));
-	next(ls);  /* skip `\n' or `\r' */
-	if (currIsNewline(ls) && ls->current != old)
-		next(ls);  /* skip `\n\r' or `\r\n' */
-	if (++ls->linenumber >= MAX_INT)
-		lex_syntaxerror(ls, "chunk has too many lines");
-}
-
-void lex_setinput(ktap_lexstate *ls, char *ptr, ktap_string *source, int firstchar)
-{
-	ls->decpoint = '.';
-	ls->current = firstchar;
-	ls->lookahead.token = TK_EOS;  /* no look-ahead token */
-	ls->ptr = ptr;
-	ls->fs = NULL;
-	ls->linenumber = 1;
-	ls->lastline = 1;
-	ls->source = source;
-	ls->envn = ktapc_ts_new(KTAP_ENV);  /* create env name */
-	mbuff_resize(ls->buff, KTAP_MINBUFFER);  /* initialize buffer */
-}
-
-/*
- * =======================================================
- * LEXICAL ANALYZER
- * =======================================================
- */
-static int check_next(ktap_lexstate *ls, const char *set)
-{
-	if (ls->current == '\0' || !strchr(set, ls->current))
-		return 0;
-	save_and_next(ls);
-	return 1;
-}
-
-/*
- * change all characters 'from' in buffer to 'to'
- */
-static void buffreplace(ktap_lexstate *ls, char from, char to)
-{
-	size_t n = mbuff_len(ls->buff);
-	char *p = mbuff(ls->buff);
-	while (n--)
-		if (p[n] == from) p[n] = to;
-}
-
-#if !defined(getlocaledecpoint)
-#define getlocaledecpoint()	(localeconv()->decimal_point[0])
-#endif
-
-#define mbuff2d(b,e)	ktapc_str2d(mbuff(b), mbuff_len(b) - 1, e)
-
-/*
- * in case of format error, try to change decimal point separator to
- * the one defined in the current locale and check again
- */
-static void trydecpoint(ktap_lexstate *ls, ktap_seminfo *seminfo)
-{
-	char old = ls->decpoint;
-	ls->decpoint = getlocaledecpoint();
-	buffreplace(ls, old, ls->decpoint);  /* try new decimal separator */
-	if (!mbuff2d(ls->buff, &seminfo->r)) {
-		/* format error with correct decimal point: no more options */
-		buffreplace(ls, ls->decpoint, '.');  /* undo change (for error message) */
-		lexerror(ls, "malformed number", TK_NUMBER);
-	}
-}
-
-/*
- * this function is quite liberal in what it accepts, as 'ktapc_str2d'
- * will reject ill-formed numerals.
- */
-static void read_numeral(ktap_lexstate *ls, ktap_seminfo *seminfo)
-{
-	const char *expo = "Ee";
-	int first = ls->current;
-
-	ktap_assert(isdigit(ls->current));
-	save_and_next(ls);
-	if (first == '0' && check_next(ls, "Xx"))  /* hexadecimal? */
-		expo = "Pp";
-	for (;;) {
-		if (check_next(ls, expo))  /* exponent part? */
-			check_next(ls, "+-");  /* optional exponent sign */
-		if (isxdigit(ls->current) || ls->current == '.')
-			save_and_next(ls);
-		else
-			break;
-	}
-	save(ls, '\0');
-	buffreplace(ls, '.', ls->decpoint);  /* follow locale for decimal point */
-	if (!mbuff2d(ls->buff, &seminfo->r))  /* format error? */
-		trydecpoint(ls, seminfo); /* try to update decimal point separator */
-}
-
-/*
- * skip a sequence '[=*[' or ']=*]' and return its number of '='s or
- * -1 if sequence is malformed
- */
-static int skip_sep(ktap_lexstate *ls)
-{
-	int count = 0;
-	int s = ls->current;
-
-	ktap_assert(s == '[' || s == ']');
-	save_and_next(ls);
-	while (ls->current == '=') {
-		save_and_next(ls);
-		count++;
-	}
-	return (ls->current == s) ? count : (-count) - 1;
-}
-
-static void read_long_string(ktap_lexstate *ls, ktap_seminfo *seminfo, int sep)
-{
-	save_and_next(ls);  /* skip 2nd `[' */
-	if (currIsNewline(ls))  /* string starts with a newline? */
-		inclinenumber(ls);  /* skip it */
-	for (;;) {
-		switch (ls->current) {
-		case EOZ:
-			lexerror(ls, (seminfo) ? "unfinished long string" :
-				"unfinished long comment", TK_EOS);
-			break;  /* to avoid warnings */
-		case ']': {
-			if (skip_sep(ls) == sep) {
-				save_and_next(ls);  /* skip 2nd `]' */
-				goto endloop;
-			}
-			break;
-		}
-		case '\n':
-		case '\r': {
-			save(ls, '\n');
-			inclinenumber(ls);
-			/* avoid wasting space */
-			if (!seminfo)
-				mbuff_reset(ls->buff);
-			break;
-		}
-		default: {
-			if (seminfo)
-				save_and_next(ls);
-			else
-				next(ls);
-		}
-		}
-	}
-
- endloop:
-	if (seminfo)
-		seminfo->ts = lex_newstring(ls, mbuff(ls->buff) + (2 + sep),
-			mbuff_len(ls->buff) - 2*(2 + sep));
-}
-
-static void escerror(ktap_lexstate *ls, int *c, int n, const char *msg)
-{
-	int i;
-	mbuff_reset(ls->buff);  /* prepare error message */
-	save(ls, '\\');
-	for (i = 0; i < n && c[i] != EOZ; i++)
-		save(ls, c[i]);
-	lexerror(ls, msg, TK_STRING);
-}
-
-static int readhexaesc(ktap_lexstate *ls)
-{
-	int c[3], i;  /* keep input for error message */
-	int r = 0;  /* result accumulator */
-	c[0] = 'x';  /* for error message */
-	for (i = 1; i < 3; i++) {  /* read two hexa digits */
-		c[i] = next(ls);
-		if (!isxdigit(c[i]))
-			escerror(ls, c, i + 1, "hexadecimal digit expected");
-		r = (r << 4) + ktapc_hexavalue(c[i]);
-	}
-	return r;
-}
-
-static int readdecesc(ktap_lexstate *ls)
-{
-	int c[3], i;
-	int r = 0;  /* result accumulator */
-	for (i = 0; i < 3 && isdigit(ls->current); i++) {  /* read up to 3 digits */
-		c[i] = ls->current;
-		r = 10*r + c[i] - '0';
-		next(ls);
-	}
-	if (r > UCHAR_MAX)
-		escerror(ls, c, i, "decimal escape too large");
-	return r;
-}
-
-static void read_string(ktap_lexstate *ls, int del, ktap_seminfo *seminfo)
-{
-	save_and_next(ls);  /* keep delimiter (for error messages) */
-	while (ls->current != del) {
-		switch (ls->current) {
-		case EOZ:
-			lexerror(ls, "unfinished string", TK_EOS);
-			break;  /* to avoid warnings */
-		case '\n':
-		case '\r':
-			lexerror(ls, "unfinished string", TK_STRING);
-			break;  /* to avoid warnings */
-		case '\\': {  /* escape sequences */
-			int c;  /* final character to be saved */
-			next(ls);  /* do not save the `\' */
-			switch (ls->current) {
-			case 'a': c = '\a'; goto read_save;
-			case 'b': c = '\b'; goto read_save;
-			case 'f': c = '\f'; goto read_save;
-			case 'n': c = '\n'; goto read_save;
-			case 'r': c = '\r'; goto read_save;
-			case 't': c = '\t'; goto read_save;
-			case 'v': c = '\v'; goto read_save;
-			case 'x': c = readhexaesc(ls); goto read_save;
-			case '\n': case '\r':
-				inclinenumber(ls); c = '\n'; goto only_save;
-			case '\\': case '\"': case '\'':
-				c = ls->current; goto read_save;
-			case EOZ: goto no_save;  /* will raise an error next loop */
-			case 'z': {  /* zap following span of spaces */
-				next(ls);  /* skip the 'z' */
-				while (isspace(ls->current)) {
-					if (currIsNewline(ls))
-						inclinenumber(ls);
-					else
-						next(ls);
-				}
-				goto no_save;
-			}
-			default: {
-				if (!isdigit(ls->current))
-					escerror(ls, &ls->current, 1, "invalid escape sequence");
-				/* digital escape \ddd */
-				c = readdecesc(ls);
-				goto only_save;
-			}
-			}
- read_save:
-			next(ls);  /* read next character */
- only_save:
-			save(ls, c);  /* save 'c' */
- no_save:
-			break;
-		}
-		default:
-			save_and_next(ls);
-		}
-	}
-	save_and_next(ls);  /* skip delimiter */
-	seminfo->ts = lex_newstring(ls, mbuff(ls->buff) + 1, mbuff_len(ls->buff) - 2);
-}
-
-static int llex(ktap_lexstate *ls, ktap_seminfo *seminfo)
-{
-	mbuff_reset(ls->buff);
-
-	for (;;) {
-		switch (ls->current) {
-		case '\n': case '\r': {  /* line breaks */
-			inclinenumber(ls);
-			break;
-		}
-		case ' ': case '\f': case '\t': case '\v': {  /* spaces */
-			next(ls);
-			break;
-		}
-		case '#': {
-			while (!currIsNewline(ls) && ls->current != EOZ)
-				next(ls);  /* skip until end of line (or end of file) */
-			break;
-		}
-		#if 0
-		case '-': {  /* '-' or '--' (comment) */
-			next(ls);
-			if (ls->current != '-')
-				return '-';
-			/* else is a comment */
-			next(ls);
-			if (ls->current == '[') {  /* long comment? */
-				int sep = skip_sep(ls);
-				mbuff_reset(ls->buff);  /* `skip_sep' may dirty the buffer */
-				if (sep >= 0) {
-					read_long_string(ls, NULL, sep);  /* skip long comment */
-					mbuff_reset(ls->buff);  /* previous call may dirty the buff. */
-					break;
-				}
-			}
-			/* else short comment */
-			while (!currIsNewline(ls) && ls->current != EOZ)
-				next(ls);  /* skip until end of line (or end of file) */
-			break;
-		}
-		#endif
-		case '[': {  /* long string or simply '[' */
-			int sep = skip_sep(ls);
-			if (sep >= 0) {
-				read_long_string(ls, seminfo, sep);
-				return TK_STRING;
-			}
-			else if (sep == -1)
-				return '[';
-			else
-				lexerror(ls, "invalid long string delimiter", TK_STRING);
-		}
-		case '+': {
-			next(ls);
-			if (ls->current != '=')
-				return '+';
-			else {
-				next(ls);
-				return TK_INCR;
-			}
-		}
-		case '=': {
-			next(ls);
-			if (ls->current != '=')
-				return '=';
-			else {
-				next(ls);
-				return TK_EQ;
-			}
-		}
-		case '<': {
-			next(ls);
-			if (ls->current != '=')
-				return '<';
-			else {
-				next(ls);
-				return TK_LE;
-			}
-		}
-		case '>': {
-			next(ls);
-			if (ls->current != '=')
-				return '>';
-			else {
-				next(ls);
-				return TK_GE;
-			}
-		}
-		case '!': {
-			next(ls);
-			if (ls->current != '=')
-				return TK_NOT;
-			else {
-				next(ls);
-				return TK_NE;
-			}
-		}
-		case ':': {
-			next(ls);
-			if (ls->current != ':')
-				return ':';
-			else {
-				next(ls);
-				return TK_DBCOLON;
-			}
-		}
-		case '"': case '\'': {  /* short literal strings */
-			read_string(ls, ls->current, seminfo);
-			return TK_STRING;
-		}
-		case '.': {  /* '.', '..', '...', or number */
-			save_and_next(ls);
-			if (check_next(ls, ".")) {
-				if (check_next(ls, "."))
-					return TK_DOTS;   /* '...' */
-				else
-					return TK_CONCAT;   /* '..' */
-			}
-			else if (!isdigit(ls->current))
-				return '.';
-			/* else go through */
-		}
-		case '0': case '1': case '2': case '3': case '4':
-		case '5': case '6': case '7': case '8': case '9': {
-			read_numeral(ls, seminfo);
-			return TK_NUMBER;
-		}
-		case EOZ: {
-			return TK_EOS;
-		}
-		case '&': {
-			next(ls);
-			if (ls->current != '&')
-				return '&';
-			else {
-				next(ls);
-				return TK_AND;
-			}
-		} 
-		case '|': {
-			next(ls);
-			if (ls->current != '|')
-				return '|';
-			else {
-				next(ls);
-				return TK_OR;
-			}
-		} 
-		default: {
-			if (islalpha(ls->current)) {
-				/* identifier or reserved word? */
-				ktap_string *ts;
-				do {
-					save_and_next(ls);
-				} while (islalnum(ls->current));
-				ts = lex_newstring(ls, mbuff(ls->buff),
-							mbuff_len(ls->buff));
-				seminfo->ts = ts;
-				if (isreserved(ts))  /* reserved word? */
-					return ts->tsv.extra - 1 +
-						FIRST_RESERVED;
-				else {
-					return TK_NAME;
-				}
-			} else {  /* single-char tokens (+ - / ...) */
-				int c = ls->current;
-				next(ls);
-				return c;
-			}
-		}
-		}
-	}
-}
-
-void lex_read_string_until(ktap_lexstate *ls, int c)
-{
-	ktap_string *ts;
-	char errmsg[32];
-
-	mbuff_reset(ls->buff);
-
-	while (ls->current == ' ')
-		next(ls);
-
-	do {
-		save_and_next(ls);
-	} while (ls->current != c && ls->current != EOZ);
-
-	if (ls->current != c) {
-		sprintf(errmsg, "expect %c", c);
-		lexerror(ls, errmsg, 0);
-	}
-
-	ts = lex_newstring(ls, mbuff(ls->buff), mbuff_len(ls->buff));
-	ls->t.seminfo.ts = ts;
-	ls->t.token = TK_STRING;
-}
-
-void lex_next(ktap_lexstate *ls)
-{
-	ls->lastline = ls->linenumber;
-	if (ls->lookahead.token != TK_EOS) {  /* is there a look-ahead token? */
-		ls->t = ls->lookahead;  /* use this one */
-		ls->lookahead.token = TK_EOS;  /* and discharge it */
-	} else
-		ls->t.token = llex(ls, &ls->t.seminfo);  /* read next token */
-}
-
-int lex_lookahead(ktap_lexstate *ls)
-{
-	ktap_assert(ls->lookahead.token == TK_EOS);
-	ls->lookahead.token = llex(ls, &ls->lookahead.seminfo);
-	return ls->lookahead.token;
-}
-
diff --git a/drivers/staging/ktap/userspace/main.c b/drivers/staging/ktap/userspace/main.c
deleted file mode 100644
index 2aa686a..0000000
--- a/drivers/staging/ktap/userspace/main.c
+++ /dev/null
@@ -1,609 +0,0 @@
-/*
- * main.c - ktap compiler and loader entry
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <sched.h>
-#include <string.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <math.h>
-
-#include "../include/ktap_types.h"
-#include "../include/ktap_opcodes.h"
-#include "ktapc.h"
-
-
-/*******************************************************************/
-
-void *ktapc_reallocv(void *block, size_t osize, size_t nsize)
-{
-	return kp_reallocv(NULL, block, osize, nsize);
-}
-
-ktap_closure *ktapc_newlclosure(int n)
-{
-	return kp_newlclosure(NULL, n);
-}
-
-ktap_proto *ktapc_newproto()
-{
-	return kp_newproto(NULL);
-}
-
-const ktap_value *ktapc_table_get(ktap_table *t, const ktap_value *key)
-{
-	return kp_table_get(t, key);
-}
-
-void ktapc_table_setvalue(ktap_table *t, const ktap_value *key, ktap_value *val)
-{
-	kp_table_setvalue(NULL, t, key, val);
-}
-
-ktap_table *ktapc_table_new()
-{
-	return kp_table_new(NULL);
-}
-
-ktap_string *ktapc_ts_newlstr(const char *str, size_t l)
-{
-	return kp_tstring_newlstr(NULL, str, l);
-}
-
-ktap_string *ktapc_ts_new(const char *str)
-{
-	return kp_tstring_new(NULL, str);
-}
-
-int ktapc_ts_eqstr(ktap_string *a, ktap_string *b)
-{
-	return kp_tstring_eqstr(a, b);
-}
-
-static void ktapc_runerror(const char *err_msg_fmt, ...)
-{
-	va_list ap;
-
-	fprintf(stderr, "ktapc_runerror\n");
-
-	va_start(ap, err_msg_fmt);
-	vfprintf(stderr, err_msg_fmt, ap);
-	va_end(ap);
-
-	exit(EXIT_FAILURE);
-}
-
-/*
- * todo: memory leak here
- */
-char *ktapc_sprintf(const char *fmt, ...)
-{
-	char *msg = malloc(128);
-
-	va_list argp;
-	va_start(argp, fmt);
-	vsprintf(msg, fmt, argp);
-	va_end(argp);
-	return msg;
-}
-
-
-#define MINSIZEARRAY	4
-
-void *ktapc_growaux(void *block, int *size, size_t size_elems, int limit,
-		    const char *what)
-{
-	void *newblock;
-	int newsize;
-
-	if (*size >= limit/2) {  /* cannot double it? */
-		if (*size >= limit)  /* cannot grow even a little? */
-			ktapc_runerror("too many %s (limit is %d)\n",
-					what, limit);
-		newsize = limit;  /* still have at least one free place */
-	} else {
-		newsize = (*size) * 2;
-		if (newsize < MINSIZEARRAY)
-			newsize = MINSIZEARRAY;  /* minimum size */
-	}
-
-	newblock = ktapc_reallocv(block, (*size) * size_elems, newsize * size_elems);
-	*size = newsize;  /* update only when everything else is OK */
-	return newblock;
-}
-
-/*************************************************************************/
-
-#define print_base(i) \
-	do {	\
-		if (i < f->sizelocvars) /* it's a localvars */ \
-			printf("%s", getstr(f->locvars[i].varname));  \
-		else \
-			printf("base + %d", i);	\
-	} while (0)
-
-#define print_RKC(instr)	\
-	do {	\
-		if (ISK(GETARG_C(instr))) \
-			kp_showobj(NULL, k + INDEXK(GETARG_C(instr))); \
-		else \
-			print_base(GETARG_C(instr)); \
-	} while (0)
-
-static void decode_instruction(ktap_proto *f, int instr)
-{
-	int opcode = GET_OPCODE(instr);
-	ktap_value *k;
-
-	k = f->k;
-
-	printf("%.8x\t", instr);
-	printf("%s\t", ktap_opnames[opcode]);
-
-	switch (opcode) {
-	case OP_GETTABUP:
-		print_base(GETARG_A(instr));
-		printf(" <- ");
-
-		if (GETARG_B(instr) == 0)
-			printf("global");
-		else
-			printf("upvalues[%d]", GETARG_B(instr));
-
-		printf("{"); print_RKC(instr); printf("}");
-
-		break;
-	case OP_GETTABLE:
-		print_base(GETARG_A(instr));
-		printf(" <- ");
-
-		print_base(GETARG_B(instr));
-
-		printf("{");
-		print_RKC(instr);
-		printf("}");
-		break;
-	case OP_LOADK:
-		printf("\t");
-		print_base(GETARG_A(instr));
-		printf(" <- ");
-
-		kp_showobj(NULL, k + GETARG_Bx(instr));
-		break;
-	case OP_CALL:
-		printf("\t");
-		print_base(GETARG_A(instr));
-		break;
-	case OP_JMP:
-		printf("\t%d", GETARG_sBx(instr));
-		break;
-	default:
-		break;
-	}
-
-	printf("\n");
-}
-
-static int function_nr = 0;
-
-/* this is a debug function used for check bytecode chunk file */
-static void dump_function(int level, ktap_proto *f)
-{
-	int i;
-
-	printf("\n----------------------------------------------------\n");
-	printf("function %d [level %d]:\n", function_nr++, level);
-	printf("linedefined: %d\n", f->linedefined);
-	printf("lastlinedefined: %d\n", f->lastlinedefined);
-	printf("numparams: %d\n", f->numparams);
-	printf("is_vararg: %d\n", f->is_vararg);
-	printf("maxstacksize: %d\n", f->maxstacksize);
-	printf("source: %s\n", getstr(f->source));
-	printf("sizelineinfo: %d \t", f->sizelineinfo);
-	for (i = 0; i < f->sizelineinfo; i++)
-		printf("%d ", f->lineinfo[i]);
-	printf("\n");
-
-	printf("sizek: %d\n", f->sizek);
-	for (i = 0; i < f->sizek; i++) {
-		switch(f->k[i].type) {
-		case KTAP_TNIL:
-			printf("\tNIL\n");
-			break;
-		case KTAP_TBOOLEAN:
-			printf("\tBOOLEAN: ");
-			printf("%d\n", f->k[i].val.b);
-			break;
-		case KTAP_TNUMBER:
-			printf("\tTNUMBER: ");
-			printf("%ld\n", f->k[i].val.n);
-			break;
-		case KTAP_TSTRING:
-			printf("\tTSTRING: ");
-			printf("%s\n", svalue(&(f->k[i])));
-
-			break;
-		default:
-			printf("\terror: unknow constant type\n");
-		}
-	}
-
-	printf("sizelocvars: %d\n", f->sizelocvars);
-	for (i = 0; i < f->sizelocvars; i++) {
-		printf("\tlocvars: %s startpc: %d endpc: %d\n",
-			getstr(f->locvars[i].varname), f->locvars[i].startpc,
-			f->locvars[i].endpc);
-	}
-
-	printf("sizeupvalues: %d\n", f->sizeupvalues);
-	for (i = 0; i < f->sizeupvalues; i++) {
-		printf("\tname: %s instack: %d idx: %d\n",
-			getstr(f->upvalues[i].name), f->upvalues[i].instack,
-			f->upvalues[i].idx);
-	}
-
-	printf("\n");
-	printf("sizecode: %d\n", f->sizecode);
-	for (i = 0; i < f->sizecode; i++)
-		decode_instruction(f, f->code[i]);
-
-	printf("sizep: %d\n", f->sizep);
-	for (i = 0; i < f->sizep; i++)
-		dump_function(level + 1, f->p[i]);
-
-}
-
-static void usage(const char *msg_fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, msg_fmt);
-	fprintf(stderr, msg_fmt, ap);
-	va_end(ap);
-
-	fprintf(stderr,
-"Usage: ktap [options] file [script args] -- cmd [args]\n"
-"   or: ktap [options] -e one-liner  -- cmd [args]\n"
-"\n"
-"Options and arguments:\n"
-"  -o file        : send script output to file, instead of stderr\n"
-"  -p pid         : specific tracing pid\n"
-"  -C cpu         : cpu to monitor in system-wide\n"
-"  -T             : show timestamp for event\n"
-"  -V             : show version\n"
-"  -v             : enable verbose mode\n"
-"  -s             : simple event tracing\n"
-"  -b             : list byte codes\n"
-"  file           : program read from script file\n"
-"  -- cmd [args]  : workload to tracing\n");
-
-	exit(EXIT_FAILURE);
-}
-
-ktap_global_state dummy_global_state;
-
-static void init_dummy_global_state()
-{
-	memset(&dummy_global_state, 0, sizeof(ktap_global_state));
-	dummy_global_state.seed = 201236;
-
-        kp_tstring_resize(NULL, 32); /* set inital string hashtable size */
-}
-
-#define handle_error(str) do { perror(str); exit(-1); } while(0)
-
-static struct ktap_parm uparm;
-static int ktap_trunk_mem_size = 1024;
-
-static int ktapc_writer(const void* p, size_t sz, void* ud)
-{
-	if (uparm.trunk_len + sz > ktap_trunk_mem_size) {
-		int new_size = (uparm.trunk_len + sz) * 2;
-		uparm.trunk = realloc(uparm.trunk, new_size);
-		ktap_trunk_mem_size = new_size;
-	}
-
-	memcpy(uparm.trunk + uparm.trunk_len, p, sz);
-	uparm.trunk_len += sz;
-
-	return 0;
-}
-
-
-static int forks;
-static char **workload_argv;
-
-static int fork_workload(int ktap_fd)
-{
-	int pid;
-
-	pid = fork();
-	if (pid < 0)
-		handle_error("failed to fork");
-
-	if (pid > 0)
-		return pid;
-
-	signal(SIGTERM, SIG_DFL);
-
-	execvp("", workload_argv);
-
-	/*
-	 * waiting ktapvm prepare all tracing event
-	 * make it more robust in future.
-	 */
-	pause();
-
-	execvp(workload_argv[0], workload_argv);
-
-	perror(workload_argv[0]);
-	exit(-1);
-
-	return -1;
-}
-
-#define KTAPVM_PATH "/sys/kernel/debug/ktap/ktapvm"
-
-static char *output_filename;
-pid_t ktap_pid;
-
-static int run_ktapvm()
-{
-        int ktapvm_fd, ktap_fd;
-	int ret;
-
-	ktap_pid = getpid();
-
-	ktapvm_fd = open(KTAPVM_PATH, O_RDONLY);
-	if (ktapvm_fd < 0)
-		handle_error("open " KTAPVM_PATH " failed");
-
-	ktap_fd = ioctl(ktapvm_fd, 0, NULL);
-	if (ktap_fd < 0)
-		handle_error("ioctl ktapvm failed");
-
-	ktapio_create(output_filename);
-
-	if (forks) {
-		uparm.trace_pid = fork_workload(ktap_fd);
-		uparm.workload = 1;
-	}
-
-	ret = ioctl(ktap_fd, KTAP_CMD_IOC_RUN, &uparm);
-
-	close(ktap_fd);
-	close(ktapvm_fd);
-
-	return ret;
-}
-
-int verbose;
-static int dump_bytecode;
-static char oneline_src[1024];
-static int trace_pid = -1;
-static int trace_cpu = -1;
-static int print_timestamp;
-
-#define SIMPLE_ONE_LINER_FMT	\
-	"trace %s { print(cpu(), tid(), execname(), argevent) }"
-
-static const char *script_file;
-static int script_args_start;
-static int script_args_end;
-
-static void parse_option(int argc, char **argv)
-{
-	char pid[32] = {0};
-	char cpu_str[32] = {0};
-	char *next_arg;
-	int i, j;
-
-	for (i = 1; i < argc; i++) {
-		if (argv[i][0] != '-') {
-			script_file = argv[i];
-			if (!script_file)
-				usage("");
-
-			script_args_start = i + 1;
-			script_args_end = argc;
-
-			for (j = i + 1; j < argc; j++) {
-				if (argv[j][0] == '-' && argv[j][1] == '-')
-					goto found_cmd;
-			}
-
-			return;
-		}
-
-		if (argv[i][0] == '-' && argv[i][1] == '-') {
-			j = i;
-			goto found_cmd;
-		}
-
-		next_arg = argv[i + 1];
-
-		switch (argv[i][1]) {
-		case 'o':
-			output_filename = malloc(strlen(next_arg) + 1);
-			if (!output_filename)
-				return;
-
-			strncpy(output_filename, next_arg, strlen(next_arg));
-			i++;
-			break;
-		case 'e':
-			strncpy(oneline_src, next_arg, strlen(next_arg));
-			i++;
-			break;
-		case 'p':
-			strncpy(pid, next_arg, strlen(next_arg));
-			trace_pid = atoi(pid);
-			i++;
-			break;
-		case 'C':
-			strncpy(cpu_str, next_arg, strlen(next_arg));
-			trace_cpu = atoi(cpu_str);
-			i++;
-			break;
-		case 'T':
-			print_timestamp = 1;
-			break;
-		case 'v':
-			verbose = 1;
-			break;
-		case 's':
-			sprintf(oneline_src, SIMPLE_ONE_LINER_FMT, next_arg);
-			i++;
-			break;
-		case 'b':
-			dump_bytecode = 1;
-			break;
-		case 'V':
-		case '?':
-		case 'h':
-			usage("");
-			break;
-		default:
-			usage("wrong argument\n");
-			break;
-		}
-	}
-
-	return;
-
- found_cmd:
-	script_args_end = j;
-	forks = 1;
-	workload_argv = &argv[j + 1];
-}
-
-static void compile(const char *input)
-{
-	ktap_closure *cl;
-	char *buff;
-	struct stat sb;
-	int fdin;
-
-	if (oneline_src[0] != '\0') {
-		init_dummy_global_state();
-		cl = ktapc_parser(oneline_src, input);
-		goto dump;
-	}
-
-	fdin = open(input, O_RDONLY);
-	if (fdin < 0) {
-		fprintf(stderr, "open file %s failed\n", input);
-		exit(-1);
-	}
-
-	if (fstat(fdin, &sb) == -1)
-		handle_error("fstat failed");
-
-	buff = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fdin, 0);
-	if (buff == MAP_FAILED)
-		handle_error("mmap failed");
-
-	init_dummy_global_state();
-	cl = ktapc_parser(buff, input);
-
-	munmap(buff, sb.st_size);
-	close(fdin);
-
- dump:
-	if (dump_bytecode) {
-		dump_function(1, cl->l.p);
-		exit(0);
-	}
-
-	/* ktapc output */
-	uparm.trunk = malloc(ktap_trunk_mem_size);
-	if (!uparm.trunk)
-		handle_error("malloc failed");
-
-	ktapc_dump(cl->l.p, ktapc_writer, NULL, 0);
-}
-
-int main(int argc, char **argv)
-{
-	char **ktapvm_argv;
-	int new_index, i;
-	int ret;
-
-	if (argc == 1)
-		usage("");
-
-	parse_option(argc, argv);
-
-	if (oneline_src[0] != '\0')
-		script_file = "one-liner";
-
-	compile(script_file);
-
-	ktapvm_argv = (char **)malloc(sizeof(char *)*(script_args_end -
-					script_args_start + 1));
-	if (!ktapvm_argv) {
-		fprintf(stderr, "canno allocate ktapvm_argv\n");
-		return -1;
-	}
-
-	ktapvm_argv[0] = malloc(strlen(script_file) + 1);
-	if (!ktapvm_argv[0]) {
-		fprintf(stderr, "canno allocate memory\n");
-		return -1;
-	}
-	strcpy(ktapvm_argv[0], script_file);
-	ktapvm_argv[0][strlen(script_file)] = '\0';
-
-	/* pass rest argv into ktapvm */
-	new_index = 1;
-	for (i = script_args_start; i < script_args_end; i++) {
-		ktapvm_argv[new_index] = malloc(strlen(argv[i]) + 1);
-		if (!ktapvm_argv[new_index]) {
-			fprintf(stderr, "canno allocate memory\n");
-			return -1;
-		}
-		strcpy(ktapvm_argv[new_index], argv[i]);
-		ktapvm_argv[new_index][strlen(argv[i])] = '\0';
-		new_index++;
-	}
-
-	uparm.argv = ktapvm_argv;
-	uparm.argc = new_index;
-	uparm.verbose = verbose;
-	uparm.trace_pid = trace_pid;
-	uparm.trace_cpu = trace_cpu;
-	uparm.print_timestamp = print_timestamp;
-
-	/* start running into kernel ktapvm */
-	ret = run_ktapvm();
-
-	cleanup_event_resources();
-	return ret;
-}
-
-
diff --git a/drivers/staging/ktap/userspace/parser.c b/drivers/staging/ktap/userspace/parser.c
deleted file mode 100644
index dd9e2de..0000000
--- a/drivers/staging/ktap/userspace/parser.c
+++ /dev/null
@@ -1,1910 +0,0 @@
-/*
- * parser.c - ktap parser
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "../include/ktap_types.h"
-#include "../include/ktap_opcodes.h"
-#include "ktapc.h"
-
-/* maximum number of local variables per function (must be smaller
-   than 250, due to the bytecode format) */
-#define MAXVARS		200
-
-#define hasmultret(k)		((k) == VCALL || (k) == VVARARG)
-
-
-/*
- * nodes for block list (list of active blocks)
- */
-typedef struct ktap_blockcnt {
-	struct ktap_blockcnt *previous;  /* chain */
-	short firstlabel;  /* index of first label in this block */
-	short firstgoto;  /* index of first pending goto in this block */
-	u8 nactvar;  /* # active locals outside the block */
-	u8 upval;  /* true if some variable in the block is an upvalue */
-	 u8 isloop;  /* true if `block' is a loop */
-} ktap_blockcnt;
-
-/*
- * prototypes for recursive non-terminal functions
- */
-static void statement (ktap_lexstate *ls);
-static void expr (ktap_lexstate *ls, ktap_expdesc *v);
-
-static void anchor_token(ktap_lexstate *ls)
-{
-	/* last token from outer function must be EOS */
-	ktap_assert((int)(ls->fs != NULL) || ls->t.token == TK_EOS);
-	if (ls->t.token == TK_NAME || ls->t.token == TK_STRING) {
-		ktap_string *ts = ls->t.seminfo.ts;
-		lex_newstring(ls, getstr(ts), ts->tsv.len);
-	}
-}
-
-/* semantic error */
-static void semerror(ktap_lexstate *ls, const char *msg)
-{
-	ls->t.token = 0;  /* remove 'near to' from final message */
-	lex_syntaxerror(ls, msg);
-}
-
-static void error_expected(ktap_lexstate *ls, int token)
-{
-	lex_syntaxerror(ls,
-		ktapc_sprintf("%s expected", lex_token2str(ls, token)));
-}
-
-static void errorlimit(ktap_funcstate *fs, int limit, const char *what)
-{
-	const char *msg;
-	int line = fs->f->linedefined;
-	const char *where = (line == 0) ? "main function"
-				: ktapc_sprintf("function at line %d", line);
-
-	msg = ktapc_sprintf("too many %s (limit is %d) in %s",
-				what, limit, where);
-	lex_syntaxerror(fs->ls, msg);
-}
-
-static void checklimit(ktap_funcstate *fs, int v, int l, const char *what)
-{
-	if (v > l)
-		errorlimit(fs, l, what);
-}
-
-static int testnext(ktap_lexstate *ls, int c)
-{
-	if (ls->t.token == c) {
-		lex_next(ls);
-		return 1;
-	}
-	else
-		return 0;
-}
-
-static void check(ktap_lexstate *ls, int c)
-{
-	if (ls->t.token != c)
-		error_expected(ls, c);
-}
-
-static void checknext(ktap_lexstate *ls, int c)
-{
-	check(ls, c);
-	lex_next(ls);
-}
-
-#define check_condition(ls,c,msg)	{ if (!(c)) lex_syntaxerror(ls, msg); }
-
-static void check_match(ktap_lexstate *ls, int what, int who, int where)
-{
-	if (!testnext(ls, what)) {
-		if (where == ls->linenumber)
-			error_expected(ls, what);
-		else {
-			lex_syntaxerror(ls, ktapc_sprintf(
-					"%s expected (to close %s at line %d)",
-					lex_token2str(ls, what),
-					lex_token2str(ls, who), where));
-		}
-	}
-}
-
-static ktap_string *str_checkname(ktap_lexstate *ls)
-{
-	ktap_string *ts;
-
-	check(ls, TK_NAME);
-	ts = ls->t.seminfo.ts;
-	lex_next(ls);
-	return ts;
-}
-
-static void init_exp(ktap_expdesc *e, expkind k, int i)
-{
-	e->f = e->t = NO_JUMP;
-	e->k = k;
-	e->u.info = i;
-}
-
-static void codestring(ktap_lexstate *ls, ktap_expdesc *e, ktap_string *s)
-{
-	init_exp(e, VK, codegen_stringK(ls->fs, s));
-}
-
-static void checkname(ktap_lexstate *ls, ktap_expdesc *e)
-{
-	codestring(ls, e, str_checkname(ls));
-}
-
-static int registerlocalvar(ktap_lexstate *ls, ktap_string *varname)
-{
-	ktap_funcstate *fs = ls->fs;
-	ktap_proto *f = fs->f;
-	int oldsize = f->sizelocvars;
-
-	ktapc_growvector(f->locvars, fs->nlocvars, f->sizelocvars,
-			 ktap_locvar, SHRT_MAX, "local variables");
-
-	while (oldsize < f->sizelocvars)
-		f->locvars[oldsize++].varname = NULL;
-
-	f->locvars[fs->nlocvars].varname = varname;
-	return fs->nlocvars++;
-}
-
-static void new_localvar(ktap_lexstate *ls, ktap_string *name)
-{
-	ktap_funcstate *fs = ls->fs;
-	ktap_dyndata *dyd = ls->dyd;
-	int reg = registerlocalvar(ls, name);
-
-	checklimit(fs, dyd->actvar.n + 1 - fs->firstlocal,
-		   MAXVARS, "local variables");
-	ktapc_growvector(dyd->actvar.arr, dyd->actvar.n + 1,
-			 dyd->actvar.size, ktap_vardesc, MAX_INT, "local variables");
-	dyd->actvar.arr[dyd->actvar.n++].idx = (short)reg;
-}
-
-static void new_localvarliteral_(ktap_lexstate *ls, const char *name, size_t sz)
-{
-	new_localvar(ls, lex_newstring(ls, name, sz));
-}
-
-#define new_localvarliteral(ls,v) \
-	new_localvarliteral_(ls, "" v, (sizeof(v)/sizeof(char))-1)
-
-static ktap_locvar *getlocvar(ktap_funcstate *fs, int i)
-{
-	int idx = fs->ls->dyd->actvar.arr[fs->firstlocal + i].idx;
-
-	ktap_assert(idx < fs->nlocvars);
-	return &fs->f->locvars[idx];
-}
-
-static void adjustlocalvars(ktap_lexstate *ls, int nvars)
-{
-	ktap_funcstate *fs = ls->fs;
-
-	fs->nactvar = (u8)(fs->nactvar + nvars);
-	for (; nvars; nvars--) {
-		getlocvar(fs, fs->nactvar - nvars)->startpc = fs->pc;
-	}
-}
-
-static void removevars(ktap_funcstate *fs, int tolevel)
-{
-	fs->ls->dyd->actvar.n -= (fs->nactvar - tolevel);
-
-	while (fs->nactvar > tolevel)
-		getlocvar(fs, --fs->nactvar)->endpc = fs->pc;
-}
-
-static int searchupvalue(ktap_funcstate *fs, ktap_string *name)
-{
-	int i;
-	ktap_upvaldesc *up = fs->f->upvalues;
-
-	for (i = 0; i < fs->nups; i++) {
-		if (ktapc_ts_eqstr(up[i].name, name))
-			return i;
-	}
-	return -1;  /* not found */
-}
-
-static int newupvalue(ktap_funcstate *fs, ktap_string *name, ktap_expdesc *v)
-{
-	ktap_proto *f = fs->f;
-	int oldsize = f->sizeupvalues;
-
-	checklimit(fs, fs->nups + 1, MAXUPVAL, "upvalues");
-	ktapc_growvector(f->upvalues, fs->nups, f->sizeupvalues,
-			 ktap_upvaldesc, MAXUPVAL, "upvalues");
-
-	while (oldsize < f->sizeupvalues)
-		f->upvalues[oldsize++].name = NULL;
-	f->upvalues[(int)fs->nups].instack = (v->k == VLOCAL);
-	f->upvalues[(int)fs->nups].idx = (u8)(v->u.info);
-	f->upvalues[(int)fs->nups].name = name;
-	return fs->nups++;
-}
-
-static int searchvar(ktap_funcstate *fs, ktap_string *n)
-{
-	int i;
-
-	for (i = fs->nactvar-1; i >= 0; i--) {
-		if (ktapc_ts_eqstr(n, getlocvar(fs, i)->varname))
-			return i;
-	}
-	return -1;  /* not found */
-}
-
-/*
- * Mark block where variable at given level was defined
- * (to emit close instructions later).
- */
-static void markupval(ktap_funcstate *fs, int level)
-{
-	ktap_blockcnt *bl = fs->bl;
-
-	while (bl->nactvar > level)
-		bl = bl->previous;
-	bl->upval = 1;
-}
-
-/*
- * Find variable with given name 'n'. If it is an upvalue, add this
- * upvalue into all intermediate functions.
- */
-static int singlevaraux(ktap_funcstate *fs, ktap_string *n, ktap_expdesc *var, int base)
-{
-	if (fs == NULL)  /* no more levels? */
-		return VVOID;  /* default is global */
-	else {
-		int v = searchvar(fs, n);  /* look up locals at current level */
-		if (v >= 0) {  /* found? */
-			init_exp(var, VLOCAL, v);  /* variable is local */
-			if (!base)
-				markupval(fs, v);  /* local will be used as an upval */
-			return VLOCAL;
-		} else {  /* not found as local at current level; try upvalues */
-			int idx = searchupvalue(fs, n);  /* try existing upvalues */
-			if (idx < 0) {  /* not found? */
-				if (singlevaraux(fs->prev, n, var, 0) == VVOID) /* try upper levels */
-					return VVOID;  /* not found; is a global */
-				/* else was LOCAL or UPVAL */
-				idx  = newupvalue(fs, n, var);  /* will be a new upvalue */
-			}
-			init_exp(var, VUPVAL, idx);
-			return VUPVAL;
-		}
-	}
-}
-
-static void singlevar(ktap_lexstate *ls, ktap_expdesc *var)
-{
-	ktap_string *varname = str_checkname(ls);
-	ktap_funcstate *fs = ls->fs;
-
-	if (singlevaraux(fs, varname, var, 1) == VVOID) {  /* global name? */
-		ktap_expdesc key;
-		singlevaraux(fs, ls->envn, var, 1);  /* get environment variable */
-		ktap_assert(var->k == VLOCAL || var->k == VUPVAL);
-		codestring(ls, &key, varname);  /* key is variable name */
-		codegen_indexed(fs, var, &key);  /* env[varname] */
-	}
-}
-
-static void adjust_assign(ktap_lexstate *ls, int nvars, int nexps, ktap_expdesc *e)
-{
-	ktap_funcstate *fs = ls->fs;
-	int extra = nvars - nexps;
-
-	if (hasmultret(e->k)) {
-		extra++;  /* includes call itself */
-		if (extra < 0)
-			extra = 0;
-		codegen_setreturns(fs, e, extra);  /* last exp. provides the difference */
-		if (extra > 1)
-			codegen_reserveregs(fs, extra-1);
-	} else {
-		if (e->k != VVOID)
-			codegen_exp2nextreg(fs, e);  /* close last expression */
-		if (extra > 0) {
-			int reg = fs->freereg;
-
-			codegen_reserveregs(fs, extra);
-			codegen_nil(fs, reg, extra);
-		}
-	}
-}
-
-static void enterlevel(ktap_lexstate *ls)
-{
-	++ls->nCcalls;
-	checklimit(ls->fs, ls->nCcalls, KTAP_MAXCCALLS, "C levels");
-}
-
-static void closegoto(ktap_lexstate *ls, int g, ktap_labeldesc *label)
-{
-	int i;
-	ktap_funcstate *fs = ls->fs;
-	ktap_labellist *gl = &ls->dyd->gt;
-	ktap_labeldesc *gt = &gl->arr[g];
-
-	ktap_assert(ktapc_ts_eqstr(gt->name, label->name));
-	if (gt->nactvar < label->nactvar) {
-		ktap_string *vname = getlocvar(fs, gt->nactvar)->varname;
-		const char *msg = ktapc_sprintf(
-			"<goto %s> at line %d jumps into the scope of local " KTAP_QS,
-			getstr(gt->name), gt->line, getstr(vname));
-		semerror(ls, msg);
-	}
-
-	codegen_patchlist(fs, gt->pc, label->pc);
-	/* remove goto from pending list */
-	for (i = g; i < gl->n - 1; i++)
-		gl->arr[i] = gl->arr[i + 1];
-	gl->n--;
-}
-
-/*
- * try to close a goto with existing labels; this solves backward jumps
- */
-static int findlabel(ktap_lexstate *ls, int g)
-{
-	int i;
-	ktap_blockcnt *bl = ls->fs->bl;
-	ktap_dyndata *dyd = ls->dyd;
-	ktap_labeldesc *gt = &dyd->gt.arr[g];
-
-	/* check labels in current block for a match */
-	for (i = bl->firstlabel; i < dyd->label.n; i++) {
-		ktap_labeldesc *lb = &dyd->label.arr[i];
-		if (ktapc_ts_eqstr(lb->name, gt->name)) {  /* correct label? */
-			if (gt->nactvar > lb->nactvar &&
-				(bl->upval || dyd->label.n > bl->firstlabel))
-				codegen_patchclose(ls->fs, gt->pc, lb->nactvar);
-			closegoto(ls, g, lb);  /* close it */
-			return 1;
-		}
-	}
-	return 0;  /* label not found; cannot close goto */
-}
-
-static int newlabelentry(ktap_lexstate *ls, ktap_labellist *l, ktap_string *name,
-			 int line, int pc)
-{
-	int n = l->n;
-
-	ktapc_growvector(l->arr, n, l->size,
-			 ktap_labeldesc, SHRT_MAX, "labels/gotos");
-	l->arr[n].name = name;
-	l->arr[n].line = line;
-	l->arr[n].nactvar = ls->fs->nactvar;
-	l->arr[n].pc = pc;
-	l->n++;
-	return n;
-}
-
-
-/*
- * check whether new label 'lb' matches any pending gotos in current
- * block; solves forward jumps
- */
-static void findgotos(ktap_lexstate *ls, ktap_labeldesc *lb)
-{
-	ktap_labellist *gl = &ls->dyd->gt;
-	int i = ls->fs->bl->firstgoto;
-
-	while (i < gl->n) {
-		if (ktapc_ts_eqstr(gl->arr[i].name, lb->name))
-			closegoto(ls, i, lb);
-		else
-			i++;
-	}
-}
-
-/*
- * "export" pending gotos to outer level, to check them against
- * outer labels; if the block being exited has upvalues, and
- * the goto exits the scope of any variable (which can be the
- * upvalue), close those variables being exited.
- */
-static void movegotosout(ktap_funcstate *fs, ktap_blockcnt *bl)
-{
-	int i = bl->firstgoto;
-	ktap_labellist *gl = &fs->ls->dyd->gt;
-
-	/* correct pending gotos to current block and try to close it
-		with visible labels */
-	while (i < gl->n) {
-		ktap_labeldesc *gt = &gl->arr[i];
-
-		if (gt->nactvar > bl->nactvar) {
-			if (bl->upval)
-				codegen_patchclose(fs, gt->pc, bl->nactvar);
-			gt->nactvar = bl->nactvar;
-		}
-		if (!findlabel(fs->ls, i))
-			i++;  /* move to next one */
-	}
-}
-
-static void enterblock(ktap_funcstate *fs, ktap_blockcnt *bl, u8 isloop)
-{
-	bl->isloop = isloop;
-	bl->nactvar = fs->nactvar;
-	bl->firstlabel = fs->ls->dyd->label.n;
-	bl->firstgoto = fs->ls->dyd->gt.n;
-	bl->upval = 0;
-	bl->previous = fs->bl;
-	fs->bl = bl;
-	ktap_assert(fs->freereg == fs->nactvar);
-}
-
-
-/*
- * create a label named "break" to resolve break statements
- */
-static void breaklabel(ktap_lexstate *ls)
-{
-	ktap_string *n = ktapc_ts_new("break");
-	int l = newlabelentry(ls, &ls->dyd->label, n, 0, ls->fs->pc);
-
-	findgotos(ls, &ls->dyd->label.arr[l]);
-}
-
-/*
- * generates an error for an undefined 'goto'; choose appropriate
- * message when label name is a reserved word (which can only be 'break')
- */
-static void undefgoto(ktap_lexstate *ls, ktap_labeldesc *gt)
-{
-	const char *msg = isreserved(gt->name)
-			? "<%s> at line %d not inside a loop"
-			: "no visible label " KTAP_QS " for <goto> at line %d";
-
-	msg = ktapc_sprintf(msg, getstr(gt->name), gt->line);
-	semerror(ls, msg);
-}
-
-static void leaveblock(ktap_funcstate *fs)
-{
-	ktap_blockcnt *bl = fs->bl;
-	ktap_lexstate *ls = fs->ls;
-	if (bl->previous && bl->upval) {
-		/* create a 'jump to here' to close upvalues */
-		int j = codegen_jump(fs);
-
-		codegen_patchclose(fs, j, bl->nactvar);
-		codegen_patchtohere(fs, j);
-	}
-
-	if (bl->isloop)
-		breaklabel(ls);  /* close pending breaks */
-
-	fs->bl = bl->previous;
-	removevars(fs, bl->nactvar);
-	ktap_assert(bl->nactvar == fs->nactvar);
-	fs->freereg = fs->nactvar;  /* free registers */
-	ls->dyd->label.n = bl->firstlabel;  /* remove local labels */
-	if (bl->previous)  /* inner block? */
-		movegotosout(fs, bl);  /* update pending gotos to outer block */
-	else if (bl->firstgoto < ls->dyd->gt.n)  /* pending gotos in outer block? */
-		undefgoto(ls, &ls->dyd->gt.arr[bl->firstgoto]);  /* error */
-}
-
-/*
- * adds a new prototype into list of prototypes
- */
-static ktap_proto *addprototype(ktap_lexstate *ls)
-{
-	ktap_proto *clp;
-	ktap_funcstate *fs = ls->fs;
-	ktap_proto *f = fs->f;  /* prototype of current function */
-
-	if (fs->np >= f->sizep) {
-		int oldsize = f->sizep;
-		ktapc_growvector(f->p, fs->np, f->sizep, ktap_proto *, MAXARG_Bx, "functions");
-		while (oldsize < f->sizep)
-			f->p[oldsize++] = NULL;
-	}
-	f->p[fs->np++] = clp = ktapc_newproto();
-	return clp;
-}
-
-/*
- * codes instruction to create new closure in parent function
- */
-static void codeclosure(ktap_lexstate *ls, ktap_expdesc *v)
-{
-	ktap_funcstate *fs = ls->fs->prev;
-	init_exp(v, VRELOCABLE, codegen_codeABx(fs, OP_CLOSURE, 0, fs->np - 1));
-	codegen_exp2nextreg(fs, v);  /* fix it at stack top (for GC) */
-}
-
-static void open_func(ktap_lexstate *ls, ktap_funcstate *fs, ktap_blockcnt *bl)
-{
-	ktap_proto *f;
-
-	fs->prev = ls->fs;  /* linked list of funcstates */
-	fs->ls = ls;
-	ls->fs = fs;
-	fs->pc = 0;
-	fs->lasttarget = 0;
-	fs->jpc = NO_JUMP;
-	fs->freereg = 0;
-	fs->nk = 0;
-	fs->np = 0;
-	fs->nups = 0;
-	fs->nlocvars = 0;
-	fs->nactvar = 0;
-	fs->firstlocal = ls->dyd->actvar.n;
-	fs->bl = NULL;
-	f = fs->f;
-	f->source = ls->source;
-	f->maxstacksize = 2;  /* registers 0/1 are always valid */
-	fs->h = ktapc_table_new();
-	//table_resize(NULL, fs->h, 32, 32);
-	enterblock(fs, bl, 0);
-}
-
-static void close_func(ktap_lexstate *ls)
-{
-	ktap_funcstate *fs = ls->fs;
-	ktap_proto *f = fs->f;
-
-	codegen_ret(fs, 0, 0);  /* final return */
-	leaveblock(fs);
-	ktapc_reallocvector(f->code, f->sizecode, fs->pc, ktap_instruction);
-	f->sizecode = fs->pc;
-	ktapc_reallocvector(f->lineinfo, f->sizelineinfo, fs->pc, int);
-	f->sizelineinfo = fs->pc;
-	ktapc_reallocvector(f->k, f->sizek, fs->nk, ktap_value);
-	f->sizek = fs->nk;
-	ktapc_reallocvector(f->p, f->sizep, fs->np, ktap_proto *);
-	f->sizep = fs->np;
-	ktapc_reallocvector(f->locvars, f->sizelocvars, fs->nlocvars, ktap_locvar);
-	f->sizelocvars = fs->nlocvars;
-	ktapc_reallocvector(f->upvalues, f->sizeupvalues, fs->nups, ktap_upvaldesc);
-	f->sizeupvalues = fs->nups;
-	ktap_assert((int)(fs->bl == NULL));
-	ls->fs = fs->prev;
-	/* last token read was anchored in defunct function; must re-anchor it */
-	anchor_token(ls);
-}
-
-/*============================================================*/
-/* GRAMMAR RULES */
-/*============================================================*/
-
-/*
- * check whether current token is in the follow set of a block.
- * 'until' closes syntactical blocks, but do not close scope,
- * so it handled in separate.
- */
-static int block_follow(ktap_lexstate *ls, int withuntil)
-{
-	switch (ls->t.token) {
-	case TK_ELSE: case TK_ELSEIF:
-	case TK_END: case TK_EOS:
-		return 1;
-	case TK_UNTIL:
-		return withuntil;
-	case '}':
-		return 1;
-	default:
-		return 0;
-	}
-}
-
-static void statlist(ktap_lexstate *ls)
-{
-	/* statlist -> { stat [`;'] } */
-	while (!block_follow(ls, 1)) {
-		if (ls->t.token == TK_RETURN) {
-			statement(ls);
-			return;  /* 'return' must be last statement */
-		}
-		statement(ls);
-	}
-}
-
-static void fieldsel(ktap_lexstate *ls, ktap_expdesc *v)
-{
-	/* fieldsel -> ['.' | ':'] NAME */
-	ktap_funcstate *fs = ls->fs;
-	ktap_expdesc key;
-
-	codegen_exp2anyregup(fs, v);
-	lex_next(ls);  /* skip the dot or colon */
-	checkname(ls, &key);
-	codegen_indexed(fs, v, &key);
-}
-
-static void yindex(ktap_lexstate *ls, ktap_expdesc *v)
-{
-	/* index -> '[' expr ']' */
-	lex_next(ls);  /* skip the '[' */
-	expr(ls, v);
-	codegen_exp2val(ls->fs, v);
-	checknext(ls, ']');
-}
-
-/*
- * {======================================================================
- * Rules for Constructors
- * =======================================================================
- */
-struct ConsControl {
-	ktap_expdesc v;  /* last list item read */
-	ktap_expdesc *t;  /* table descriptor */
-	int nh;  /* total number of `record' elements */
-	int na;  /* total number of array elements */
-	int tostore;  /* number of array elements pending to be stored */
-};
-
-static void recfield(ktap_lexstate *ls, struct ConsControl *cc)
-{
-	/* recfield -> (NAME | `['exp1`]') = exp1 */
-	ktap_funcstate *fs = ls->fs;
-	int reg = ls->fs->freereg;
-	ktap_expdesc key, val;
-	int rkkey;
-
-	if (ls->t.token == TK_NAME) {
-		checklimit(fs, cc->nh, MAX_INT, "items in a constructor");
-		checkname(ls, &key);
-	} else  /* ls->t.token == '[' */
-		yindex(ls, &key);
-
-	cc->nh++;
-  	checknext(ls, '=');
-	rkkey = codegen_exp2RK(fs, &key);
-	expr(ls, &val);
-	codegen_codeABC(fs, OP_SETTABLE, cc->t->u.info, rkkey, codegen_exp2RK(fs, &val));
-	fs->freereg = reg;  /* free registers */
-}
-
-static void closelistfield(ktap_funcstate *fs, struct ConsControl *cc)
-{
-	if (cc->v.k == VVOID)
-		return;  /* there is no list item */
-  	codegen_exp2nextreg(fs, &cc->v);
-	cc->v.k = VVOID;
-	if (cc->tostore == LFIELDS_PER_FLUSH) {
-		codegen_setlist(fs, cc->t->u.info, cc->na, cc->tostore);  /* flush */
-		cc->tostore = 0;  /* no more items pending */
-	}
-}
-
-static void lastlistfield(ktap_funcstate *fs, struct ConsControl *cc)
-{
-	if (cc->tostore == 0)
-		return;
-
-	if (hasmultret(cc->v.k)) {
-		codegen_setmultret(fs, &cc->v);
-		codegen_setlist(fs, cc->t->u.info, cc->na, KTAP_MULTRET);
-		cc->na--;  /* do not count last expression (unknown number of elements) */
-	} else {
-		if (cc->v.k != VVOID)
-			codegen_exp2nextreg(fs, &cc->v);
-		codegen_setlist(fs, cc->t->u.info, cc->na, cc->tostore);
-	}
-}
-
-static void listfield(ktap_lexstate *ls, struct ConsControl *cc)
-{
-	/* listfield -> exp */
-	expr(ls, &cc->v);
-	checklimit(ls->fs, cc->na, MAX_INT, "items in a constructor");
-	cc->na++;
-	cc->tostore++;
-}
-
-static void field(ktap_lexstate *ls, struct ConsControl *cc)
-{
-	/* field -> listfield | recfield */
-	switch(ls->t.token) {
-	case TK_NAME: {  /* may be 'listfield' or 'recfield' */
-		if (lex_lookahead(ls) != '=')  /* expression? */
-			listfield(ls, cc);
-		else
-			recfield(ls, cc);
-		break;
-	}
-	case '[': {
-		recfield(ls, cc);
-		break;
-	}
-	default:
-		listfield(ls, cc);
-		break;
-	}
-}
-
-static void constructor(ktap_lexstate *ls, ktap_expdesc *t)
-{
-	/* constructor -> '{' [ field { sep field } [sep] ] '}'
-		sep -> ',' | ';' */
-	ktap_funcstate *fs = ls->fs;
-	int line = ls->linenumber;
-	int pc = codegen_codeABC(fs, OP_NEWTABLE, 0, 0, 0);
-	struct ConsControl cc;
-
-	cc.na = cc.nh = cc.tostore = 0;
-	cc.t = t;
-	init_exp(t, VRELOCABLE, pc);
-	init_exp(&cc.v, VVOID, 0);  /* no value (yet) */
-	codegen_exp2nextreg(ls->fs, t);  /* fix it at stack top */
-	checknext(ls, '{');
-	do {
-		ktap_assert(cc.v.k == VVOID || cc.tostore > 0);
-		if (ls->t.token == '}')
-			break;
-		closelistfield(fs, &cc);
-		field(ls, &cc);
-	} while (testnext(ls, ',') || testnext(ls, ';'));
-	check_match(ls, '}', '{', line);
-	lastlistfield(fs, &cc);
-	SETARG_B(fs->f->code[pc], ktapc_int2fb(cc.na)); /* set initial array size */
-	SETARG_C(fs->f->code[pc], ktapc_int2fb(cc.nh));  /* set initial table size */
-}
-
-/* }====================================================================== */
-
-static void parlist(ktap_lexstate *ls)
-{
-	/* parlist -> [ param { `,' param } ] */
-	ktap_funcstate *fs = ls->fs;
-	ktap_proto *f = fs->f;
-	int nparams = 0;
-	f->is_vararg = 0;
-
-	if (ls->t.token != ')') {  /* is `parlist' not empty? */
-		do {
-			switch (ls->t.token) {
-			case TK_NAME: {  /* param -> NAME */
-				new_localvar(ls, str_checkname(ls));
-				nparams++;
-				break;
-			}
-			case TK_DOTS: {  /* param -> `...' */
-				lex_next(ls);
-				f->is_vararg = 1;
-				break;
-			}
-			default:
-				lex_syntaxerror(ls, "<name> or " KTAP_QL("...") " expected");
-			}
-		} while (!f->is_vararg && testnext(ls, ','));
-	}
-	adjustlocalvars(ls, nparams);
-	f->numparams = (u8)(fs->nactvar);
-	codegen_reserveregs(fs, fs->nactvar);  /* reserve register for parameters */
-}
-
-static void body(ktap_lexstate *ls, ktap_expdesc *e, int ismethod, int line)
-{
-	/* body ->  `(' parlist `)' block END */
-	ktap_funcstate new_fs;
-	ktap_blockcnt bl;
-
-	new_fs.f = addprototype(ls);
-	new_fs.f->linedefined = line;
-	open_func(ls, &new_fs, &bl);
-	checknext(ls, '(');
-	if (ismethod) {
-		new_localvarliteral(ls, "self");  /* create 'self' parameter */
-		adjustlocalvars(ls, 1);
-	}
-	parlist(ls);
-	checknext(ls, ')');
-	checknext(ls, '{');
-	statlist(ls);
-	new_fs.f->lastlinedefined = ls->linenumber;
-	checknext(ls, '}');
-	//check_match(ls, TK_END, TK_FUNCTION, line);
-	codeclosure(ls, e);
-	close_func(ls);
-}
-
-static void func_body_no_args(ktap_lexstate *ls, ktap_expdesc *e, int line)
-{
-	/* body ->  `(' parlist `)' block END */
-	ktap_funcstate new_fs;
-	ktap_blockcnt bl;
-
-	new_fs.f = addprototype(ls);
-	new_fs.f->linedefined = line;
-	open_func(ls, &new_fs, &bl);
-	checknext(ls, '{');
-	statlist(ls);
-	new_fs.f->lastlinedefined = ls->linenumber;
-	checknext(ls, '}');
-	//check_match(ls, TK_END, TK_FUNCTION, line);
-	codeclosure(ls, e);
-	close_func(ls);
-}
-
-static int explist(ktap_lexstate *ls, ktap_expdesc *v)
-{
-	/* explist -> expr { `,' expr } */
-	int n = 1;  /* at least one expression */
-
-	expr(ls, v);
-	while (testnext(ls, ',')) {
-		codegen_exp2nextreg(ls->fs, v);
-		expr(ls, v);
-		n++;
-	}
-	return n;
-}
-
-static void funcargs(ktap_lexstate *ls, ktap_expdesc *f, int line)
-{
-	ktap_funcstate *fs = ls->fs;
-	ktap_expdesc args;
-	int base, nparams;
-
-	switch (ls->t.token) {
-	case '(': {  /* funcargs -> `(' [ explist ] `)' */
-		lex_next(ls);
-		if (ls->t.token == ')')  /* arg list is empty? */
-			args.k = VVOID;
-		else {
-			explist(ls, &args);
-			codegen_setmultret(fs, &args);
-		}
-		check_match(ls, ')', '(', line);
-		break;
-	}
-	case '{': {  /* funcargs -> constructor */
-		constructor(ls, &args);
-		break;
-	}
-	case TK_STRING: {  /* funcargs -> STRING */
-		codestring(ls, &args, ls->t.seminfo.ts);
-		lex_next(ls);  /* must use `seminfo' before `next' */
-		break;
-	}
-	default: {
-		lex_syntaxerror(ls, "function arguments expected");
-	}
-	}
-	ktap_assert(f->k == VNONRELOC);
-	base = f->u.info;  /* base register for call */
-	if (hasmultret(args.k))
-		nparams = KTAP_MULTRET;  /* open call */
-	else {
-		if (args.k != VVOID)
-			codegen_exp2nextreg(fs, &args);  /* close last argument */
-		nparams = fs->freereg - (base+1);
-	}
-	init_exp(f, VCALL, codegen_codeABC(fs, OP_CALL, base, nparams+1, 2));
-	codegen_fixline(fs, line);
-	fs->freereg = base+1;  /* call remove function and arguments and leaves
-				(unless changed) one result */
-}
-
-/*
- * {======================================================================
- * Expression parsing
- * =======================================================================
- */
-static void primaryexp(ktap_lexstate *ls, ktap_expdesc *v)
-{
-	/* primaryexp -> NAME | '(' expr ')' */
-	switch (ls->t.token) {
-	case '(': {
-		int line = ls->linenumber;
-
-		lex_next(ls);
-		expr(ls, v);
-		check_match(ls, ')', '(', line);
-		codegen_dischargevars(ls->fs, v);
-		return;
-	}
-	case TK_NAME:
-		singlevar(ls, v);
-		return;
-	default:
-		lex_syntaxerror(ls, "unexpected symbol");
-	}
-}
-
-static void suffixedexp(ktap_lexstate *ls, ktap_expdesc *v)
-{
-	/* suffixedexp ->
-		primaryexp { '.' NAME | '[' exp ']' | ':' NAME funcargs | funcargs } */
-	ktap_funcstate *fs = ls->fs;
-	int line = ls->linenumber;
-
-	primaryexp(ls, v);
-	for (;;) {
-		switch (ls->t.token) {
-		case '.': {  /* fieldsel */
-			fieldsel(ls, v);
-			break;
-		}
-		case '[': {  /* `[' exp1 `]' */
-			ktap_expdesc key;
-			codegen_exp2anyregup(fs, v);
-			yindex(ls, &key);
-			codegen_indexed(fs, v, &key);
-			break;
-		}
-		case ':': {  /* `:' NAME funcargs */
-			ktap_expdesc key;
-			lex_next(ls);
-			checkname(ls, &key);
-			codegen_self(fs, v, &key);
-			funcargs(ls, v, line);
-			break;
-		}
-		case '(': case TK_STRING: case '{': {  /* funcargs */
-			codegen_exp2nextreg(fs, v);
-			funcargs(ls, v, line);
-			break;
-		}
-		default:
-			return;
-		}
-	}
-}
-
-static void simpleexp(ktap_lexstate *ls, ktap_expdesc *v)
-{
-	/* simpleexp -> NUMBER | STRING | NIL | TRUE | FALSE | ... |
-		constructor | FUNCTION body | suffixedexp */
-	switch (ls->t.token) {
-	case TK_NUMBER: {
-		init_exp(v, VKNUM, 0);
-		v->u.nval = ls->t.seminfo.r;
-		break;
-	}
-	case TK_STRING: {
-		codestring(ls, v, ls->t.seminfo.ts);
-		break;
-	}
-	case TK_NIL: {
-		init_exp(v, VNIL, 0);
-		break;
-	}
-	case TK_TRUE: {
-		init_exp(v, VTRUE, 0);
-		break;
-	}
-	case TK_FALSE: {
-		init_exp(v, VFALSE, 0);
-		break;
-	}
-	case TK_DOTS: {  /* vararg */
-		ktap_funcstate *fs = ls->fs;
-		check_condition(ls, fs->f->is_vararg,
-                      "cannot use " KTAP_QL("...") " outside a vararg function");
-		init_exp(v, VVARARG, codegen_codeABC(fs, OP_VARARG, 0, 1, 0));
-		break;
-	}
-	case '{': {  /* constructor */
-		constructor(ls, v);
-		return;
-	}
-	case TK_FUNCTION: {
-		lex_next(ls);
-		body(ls, v, 0, ls->linenumber);
-		return;
-	}
-	case TK_ARGEVENT:
-		init_exp(v, VEVENT, 0);
-		break;
-
-	case TK_ARGNAME:
-		init_exp(v, VEVENTNAME, 0);
-		break;
-	case TK_ARG1:
-	case TK_ARG2:
-	case TK_ARG3:
-	case TK_ARG4:
-	case TK_ARG5:
-	case TK_ARG6:
-	case TK_ARG7:
-	case TK_ARG8:
-	case TK_ARG9:
-		init_exp(v, VEVENTARG, ls->t.token - TK_ARG1 + 1);
-		break;
-	default: {
-		suffixedexp(ls, v);
-		return;
-	}
-	}
-	lex_next(ls);
-}
-
-static UnOpr getunopr(int op)
-{
-	switch (op) {
-	case TK_NOT: return OPR_NOT;
-	case '-': return OPR_MINUS;
-	case '#': return OPR_LEN;
-	default: return OPR_NOUNOPR;
-	}
-}
-
-static BinOpr getbinopr(int op)
-{
-	switch (op) {
-	case '+': return OPR_ADD;
-	case '-': return OPR_SUB;
-	case '*': return OPR_MUL;
-	case '/': return OPR_DIV;
-	case '%': return OPR_MOD;
-	case '^': return OPR_POW;
-	case TK_CONCAT: return OPR_CONCAT;
-	case TK_NE: return OPR_NE;
-	case TK_EQ: return OPR_EQ;
-	case '<': return OPR_LT;
-	case TK_LE: return OPR_LE;
-	case '>': return OPR_GT;
-	case TK_GE: return OPR_GE;
-	case TK_AND: return OPR_AND;
-	case TK_OR: return OPR_OR;
-	default: return OPR_NOBINOPR;
-	}
-}
-
-static const struct {
-	u8 left;  /* left priority for each binary operator */
-	u8 right; /* right priority */
-} priority[] = {  /* ORDER OPR */
-	{6, 6}, {6, 6}, {7, 7}, {7, 7}, {7, 7},  /* `+' `-' `*' `/' `%' */
-	{10, 9}, {5, 4},                 /* ^, .. (right associative) */
-	{3, 3}, {3, 3}, {3, 3},          /* ==, <, <= */
-	{3, 3}, {3, 3}, {3, 3},          /* !=, >, >= */
-	{2, 2}, {1, 1}                   /* and, or */
-};
-
-#define UNARY_PRIORITY	8  /* priority for unary operators */
-
-#define leavelevel(ls)	(ls->nCcalls--)
-
-/*
- * subexpr -> (simpleexp | unop subexpr) { binop subexpr }
- * where `binop' is any binary operator with a priority higher than `limit'
- */
-static BinOpr subexpr(ktap_lexstate *ls, ktap_expdesc *v, int limit)
-{
-	BinOpr op;
-	UnOpr uop;
-
-	enterlevel(ls);
-	uop = getunopr(ls->t.token);
-	if (uop != OPR_NOUNOPR) {
-		int line = ls->linenumber;
-
-		lex_next(ls);
-		subexpr(ls, v, UNARY_PRIORITY);
-		codegen_prefix(ls->fs, uop, v, line);
-	} else
-		simpleexp(ls, v);
-
-	/* expand while operators have priorities higher than `limit' */
-	op = getbinopr(ls->t.token);
-	while (op != OPR_NOBINOPR && priority[op].left > limit) {
-		ktap_expdesc v2;
-		BinOpr nextop;
-		int line = ls->linenumber;
-
-		lex_next(ls);
-		codegen_infix(ls->fs, op, v);
-		/* read sub-expression with higher priority */
-		nextop = subexpr(ls, &v2, priority[op].right);
-		codegen_posfix(ls->fs, op, v, &v2, line);
-		op = nextop;
-	}
-	leavelevel(ls);
-	return op;  /* return first untreated operator */
-}
-
-static void expr(ktap_lexstate *ls, ktap_expdesc *v)
-{
-	subexpr(ls, v, 0);
-}
-
-/* }==================================================================== */
-
-/*
- * {======================================================================
- * Rules for Statements
- * =======================================================================
- */
-static void block(ktap_lexstate *ls)
-{
-	/* block -> statlist */
-	ktap_funcstate *fs = ls->fs;
-	ktap_blockcnt bl;
-
-	enterblock(fs, &bl, 0);
-	statlist(ls);
-	leaveblock(fs);
-}
-
-/*
- * structure to chain all variables in the left-hand side of an
- * assignment
- */
-struct LHS_assign {
-	struct LHS_assign *prev;
-	ktap_expdesc v;  /* variable (global, local, upvalue, or indexed) */
-};
-
-/*
- * check whether, in an assignment to an upvalue/local variable, the
- * upvalue/local variable is begin used in a previous assignment to a
- * table. If so, save original upvalue/local value in a safe place and
- * use this safe copy in the previous assignment.
- */
-static void check_conflict(ktap_lexstate *ls, struct LHS_assign *lh, ktap_expdesc *v)
-{
-	ktap_funcstate *fs = ls->fs;
-	int extra = fs->freereg;  /* eventual position to save local variable */
-	int conflict = 0;
-
-	for (; lh; lh = lh->prev) {  /* check all previous assignments */
-		if (lh->v.k == VINDEXED) {  /* assigning to a table? */
-			/* table is the upvalue/local being assigned now? */
-			if (lh->v.u.ind.vt == v->k && lh->v.u.ind.t == v->u.info) {
-				conflict = 1;
-				lh->v.u.ind.vt = VLOCAL;
-				lh->v.u.ind.t = extra;  /* previous assignment will use safe copy */
-			}
-			/* index is the local being assigned? (index cannot be upvalue) */
-			if (v->k == VLOCAL && lh->v.u.ind.idx == v->u.info) {
-				conflict = 1;
-				lh->v.u.ind.idx = extra;  /* previous assignment will use safe copy */
-			}
-		}
-	}
-	if (conflict) {
-		/* copy upvalue/local value to a temporary (in position 'extra') */
-		OpCode op = (v->k == VLOCAL) ? OP_MOVE : OP_GETUPVAL;
-		codegen_codeABC(fs, op, extra, v->u.info, 0);
-		codegen_reserveregs(fs, 1);
-	}
-}
-
-static void assignment(ktap_lexstate *ls, struct LHS_assign *lh, int nvars)
-{
-	ktap_expdesc e;
-
-	check_condition(ls, vkisvar(lh->v.k), "syntax error");
-	if (testnext(ls, ',')) {  /* assignment -> ',' suffixedexp assignment */
-		struct LHS_assign nv;
-
-		nv.prev = lh;
-		suffixedexp(ls, &nv.v);
-		if (nv.v.k != VINDEXED)
-			check_conflict(ls, lh, &nv.v);
-		checklimit(ls->fs, nvars + ls->nCcalls, KTAP_MAXCCALLS,
-				"C levels");
-		assignment(ls, &nv, nvars+1);
-	} else if (testnext(ls, '=')) {  /* assignment -> '=' explist */
-		int nexps;
-
-		nexps = explist(ls, &e);
-		if (nexps != nvars) {
-			adjust_assign(ls, nvars, nexps, &e);
-			/* remove extra values */
-			if (nexps > nvars)
-				ls->fs->freereg -= nexps - nvars;
-		} else {
-			/* close last expression */
-			codegen_setoneret(ls->fs, &e);
-			codegen_storevar(ls->fs, &lh->v, &e);
-			return;  /* avoid default */
-		}
-	} else if (testnext(ls, TK_INCR)) { /* assignment -> '+=' explist */
-		int nexps;
-
-		nexps = explist(ls, &e);
-		if (nexps != nvars) {
-			lex_syntaxerror(ls, "don't allow multi-assign for +=");
-		} else {
-			/* close last expression */
-			codegen_setoneret(ls->fs, &e);
-			codegen_storeincr(ls->fs, &lh->v, &e);
-			return;  /* avoid default */
-		}
-	}
-
-	init_exp(&e, VNONRELOC, ls->fs->freereg-1);  /* default assignment */
-	codegen_storevar(ls->fs, &lh->v, &e);
-}
-
-static int cond(ktap_lexstate *ls)
-{
-	/* cond -> exp */
-	ktap_expdesc v;
-	expr(ls, &v);  /* read condition */
-	if (v.k == VNIL)
-		v.k = VFALSE;  /* `falses' are all equal here */
-	codegen_goiftrue(ls->fs, &v);
-	return v.f;
-}
-
-static void gotostat(ktap_lexstate *ls, int pc)
-{
-	int line = ls->linenumber;
-	ktap_string *label;
-	int g;
-
-	if (testnext(ls, TK_GOTO))
-		label = str_checkname(ls);
-	else {
-		lex_next(ls);  /* skip break */
-		label = ktapc_ts_new("break");
-	}
-	g = newlabelentry(ls, &ls->dyd->gt, label, line, pc);
-	findlabel(ls, g);  /* close it if label already defined */
-}
-
-/* check for repeated labels on the same block */
-static void checkrepeated(ktap_funcstate *fs, ktap_labellist *ll, ktap_string *label)
-{
-	int i;
-	for (i = fs->bl->firstlabel; i < ll->n; i++) {
-		if (ktapc_ts_eqstr(label, ll->arr[i].name)) {
-			const char *msg = ktapc_sprintf(
-				"label " KTAP_QS " already defined on line %d",
-				getstr(label), ll->arr[i].line);
-			semerror(fs->ls, msg);
-		}
-	}
-}
-
-/* skip no-op statements */
-static void skipnoopstat(ktap_lexstate *ls)
-{
-	while (ls->t.token == ';' || ls->t.token == TK_DBCOLON)
-		statement(ls);
-}
-
-static void labelstat (ktap_lexstate *ls, ktap_string *label, int line)
-{
-	/* label -> '::' NAME '::' */
-	ktap_funcstate *fs = ls->fs;
-	ktap_labellist *ll = &ls->dyd->label;
-	int l;  /* index of new label being created */
-
-	checkrepeated(fs, ll, label);  /* check for repeated labels */
-	checknext(ls, TK_DBCOLON);  /* skip double colon */
-	/* create new entry for this label */
-	l = newlabelentry(ls, ll, label, line, fs->pc);
-	skipnoopstat(ls);  /* skip other no-op statements */
-	if (block_follow(ls, 0)) {  /* label is last no-op statement in the block? */
-		/* assume that locals are already out of scope */
-		ll->arr[l].nactvar = fs->bl->nactvar;
-	}
-	findgotos(ls, &ll->arr[l]);
-}
-
-static void whilestat(ktap_lexstate *ls, int line)
-{
-	/* whilestat -> WHILE cond DO block END */
-	ktap_funcstate *fs = ls->fs;
-	int whileinit;
-	int condexit;
-	ktap_blockcnt bl;
-
-	lex_next(ls);  /* skip WHILE */
-	whileinit = codegen_getlabel(fs);
-	checknext(ls, '(');
-	condexit = cond(ls);
-	checknext(ls, ')');
-
-	enterblock(fs, &bl, 1);
-	//checknext(ls, TK_DO);
-	checknext(ls, '{');
-	block(ls);
-	codegen_jumpto(fs, whileinit);
-	checknext(ls, '}');
-	//check_match(ls, TK_END, TK_WHILE, line);
-	leaveblock(fs);
-	codegen_patchtohere(fs, condexit);  /* false conditions finish the loop */
-}
-
-static void repeatstat(ktap_lexstate *ls, int line)
-{
-	/* repeatstat -> REPEAT block UNTIL cond */
-	int condexit;
-	ktap_funcstate *fs = ls->fs;
-	int repeat_init = codegen_getlabel(fs);
-	ktap_blockcnt bl1, bl2;
-
-	enterblock(fs, &bl1, 1);  /* loop block */
-	enterblock(fs, &bl2, 0);  /* scope block */
-	lex_next(ls);  /* skip REPEAT */
-	statlist(ls);
-	check_match(ls, TK_UNTIL, TK_REPEAT, line);
-	condexit = cond(ls);  /* read condition (inside scope block) */
-	if (bl2.upval)  /* upvalues? */
-		codegen_patchclose(fs, condexit, bl2.nactvar);
-	leaveblock(fs);  /* finish scope */
-	codegen_patchlist(fs, condexit, repeat_init);  /* close the loop */
-	leaveblock(fs);  /* finish loop */
-}
-
-static int exp1(ktap_lexstate *ls)
-{
-	ktap_expdesc e;
-	int reg;
-
-	expr(ls, &e);
-	codegen_exp2nextreg(ls->fs, &e);
-	ktap_assert(e.k == VNONRELOC);
-	reg = e.u.info;
-	return reg;
-}
-
-static void forbody(ktap_lexstate *ls, int base, int line, int nvars, int isnum)
-{
-	/* forbody -> DO block */
-	ktap_blockcnt bl;
-	ktap_funcstate *fs = ls->fs;
-	int prep, endfor;
-
-	checknext(ls, ')');
-
-	adjustlocalvars(ls, 3);  /* control variables */
-	//checknext(ls, TK_DO);
-	checknext(ls, '{');
-	prep = isnum ? codegen_codeAsBx(fs, OP_FORPREP, base, NO_JUMP) : codegen_jump(fs);
-	enterblock(fs, &bl, 0);  /* scope for declared variables */
-	adjustlocalvars(ls, nvars);
-	codegen_reserveregs(fs, nvars);
-	block(ls);
-	leaveblock(fs);  /* end of scope for declared variables */
-	codegen_patchtohere(fs, prep);
-	if (isnum)  /* numeric for? */
-		endfor = codegen_codeAsBx(fs, OP_FORLOOP, base, NO_JUMP);
-	else {  /* generic for */
-		codegen_codeABC(fs, OP_TFORCALL, base, 0, nvars);
-		codegen_fixline(fs, line);
-		endfor = codegen_codeAsBx(fs, OP_TFORLOOP, base + 2, NO_JUMP);
-	}
-	codegen_patchlist(fs, endfor, prep + 1);
-	codegen_fixline(fs, line);
-}
-
-static void fornum(ktap_lexstate *ls, ktap_string *varname, int line)
-{
-	/* fornum -> NAME = exp1,exp1[,exp1] forbody */
-	ktap_funcstate *fs = ls->fs;
-	int base = fs->freereg;
-
-	new_localvarliteral(ls, "(for index)");
-	new_localvarliteral(ls, "(for limit)");
-	new_localvarliteral(ls, "(for step)");
-	new_localvar(ls, varname);
-	checknext(ls, '=');
-	exp1(ls);  /* initial value */
-	checknext(ls, ',');
-	exp1(ls);  /* limit */
-	if (testnext(ls, ','))
-		exp1(ls);  /* optional step */
-	else {  /* default step = 1 */
-		codegen_codek(fs, fs->freereg, codegen_numberK(fs, 1));
-		codegen_reserveregs(fs, 1);
-	}
-	forbody(ls, base, line, 1, 1);
-}
-
-static void forlist(ktap_lexstate *ls, ktap_string *indexname)
-{
-	/* forlist -> NAME {,NAME} IN explist forbody */
-	ktap_funcstate *fs = ls->fs;
-	ktap_expdesc e;
-	int nvars = 4;  /* gen, state, control, plus at least one declared var */
-	int line;
-	int base = fs->freereg;
-
-	/* create control variables */
-	new_localvarliteral(ls, "(for generator)");
-	new_localvarliteral(ls, "(for state)");
-	new_localvarliteral(ls, "(for control)");
-	/* create declared variables */
-	new_localvar(ls, indexname);
-	while (testnext(ls, ',')) {
-		new_localvar(ls, str_checkname(ls));
-		nvars++;
-	}
-	checknext(ls, TK_IN);
-	line = ls->linenumber;
-	adjust_assign(ls, 3, explist(ls, &e), &e);
-	codegen_checkstack(fs, 3);  /* extra space to call generator */
-	forbody(ls, base, line, nvars - 3, 0);
-}
-
-static void forstat(ktap_lexstate *ls, int line)
-{
-	/* forstat -> FOR (fornum | forlist) END */
-	ktap_funcstate *fs = ls->fs;
-	ktap_string *varname;
-	ktap_blockcnt bl;
-
-	enterblock(fs, &bl, 1);  /* scope for loop and control variables */
-	lex_next(ls);  /* skip `for' */
-
-	checknext(ls, '(');
-	varname = str_checkname(ls);  /* first variable name */
-	switch (ls->t.token) {
-	case '=':
-		fornum(ls, varname, line);
-		break;
-	case ',': case TK_IN:
-		forlist(ls, varname);
-		break;
-	default: 
-		lex_syntaxerror(ls, KTAP_QL("=") " or " KTAP_QL("in") " expected");
-	}
-	//check_match(ls, TK_END, TK_FOR, line);
-	checknext(ls, '}');
-	leaveblock(fs);  /* loop scope (`break' jumps to this point) */
-}
-
-static void test_then_block(ktap_lexstate *ls, int *escapelist)
-{
-	/* test_then_block -> [IF | ELSEIF] cond THEN block */
-	ktap_blockcnt bl;
-	ktap_funcstate *fs = ls->fs;
-	ktap_expdesc v;
-	int jf;  /* instruction to skip 'then' code (if condition is false) */
-
-	lex_next(ls);  /* skip IF or ELSEIF */
-	checknext(ls, '(');
-	expr(ls, &v);  /* read condition */
-	checknext(ls, ')');
-	//checknext(ls, TK_THEN);
-	checknext(ls, '{');
-	if (ls->t.token == TK_GOTO || ls->t.token == TK_BREAK) {
-		codegen_goiffalse(ls->fs, &v);  /* will jump to label if condition is true */
-		enterblock(fs, &bl, 0);  /* must enter block before 'goto' */
-		gotostat(ls, v.t);  /* handle goto/break */
-		skipnoopstat(ls);  /* skip other no-op statements */
-		if (block_follow(ls, 0)) {  /* 'goto' is the entire block? */
-			leaveblock(fs);
-			checknext(ls, '}');
-			return;  /* and that is it */
-		} else  /* must skip over 'then' part if condition is false */
-			jf = codegen_jump(fs);
-	} else {  /* regular case (not goto/break) */
-		codegen_goiftrue(ls->fs, &v);  /* skip over block if condition is false */
-		enterblock(fs, &bl, 0);
-		jf = v.f;
-	}
-	statlist(ls);  /* `then' part */
-	checknext(ls, '}');
-	leaveblock(fs);
-	if (ls->t.token == TK_ELSE || ls->t.token == TK_ELSEIF)  /* followed by 'else'/'elseif'? */
-		codegen_concat(fs, escapelist, codegen_jump(fs));  /* must jump over it */
-	codegen_patchtohere(fs, jf);
-}
-
-static void ifstat(ktap_lexstate *ls, int line)
-{
-	/* ifstat -> IF cond THEN block {ELSEIF cond THEN block} [ELSE block] END */
-	ktap_funcstate *fs = ls->fs;
-	int escapelist = NO_JUMP;  /* exit list for finished parts */
-
-	test_then_block(ls, &escapelist);  /* IF cond THEN block */
-	while (ls->t.token == TK_ELSEIF)
-		test_then_block(ls, &escapelist);  /* ELSEIF cond THEN block */
-	if (testnext(ls, TK_ELSE)) {
-		checknext(ls, '{');
-		block(ls);  /* `else' part */
-		checknext(ls, '}');
-	}
-	//check_match(ls, TK_END, TK_IF, line);
-	codegen_patchtohere(fs, escapelist);  /* patch escape list to 'if' end */
-}
-
-static void localfunc(ktap_lexstate *ls)
-{
-	ktap_expdesc b;
-	ktap_funcstate *fs = ls->fs;
-
-	new_localvar(ls, str_checkname(ls));  /* new local variable */
-	adjustlocalvars(ls, 1);  /* enter its scope */
-	body(ls, &b, 0, ls->linenumber);  /* function created in next register */
-	/* debug information will only see the variable after this point! */
-	getlocvar(fs, b.u.info)->startpc = fs->pc;
-}
-
-static void localstat(ktap_lexstate *ls)
-{
-	/* stat -> LOCAL NAME {`,' NAME} [`=' explist] */
-	int nvars = 0;
-	int nexps;
-	ktap_expdesc e;
-
-	do {
-		new_localvar(ls, str_checkname(ls));
-		nvars++;
-	} while (testnext(ls, ','));
-	if (testnext(ls, '='))
-		nexps = explist(ls, &e);
-	else {
-		e.k = VVOID;
-		nexps = 0;
-	}
-	adjust_assign(ls, nvars, nexps, &e);
-	adjustlocalvars(ls, nvars);
-}
-
-static int funcname(ktap_lexstate *ls, ktap_expdesc *v)
-{
-	/* funcname -> NAME {fieldsel} [`:' NAME] */
-	int ismethod = 0;
-
-	singlevar(ls, v);
-	while (ls->t.token == '.')
-		fieldsel(ls, v);
-		if (ls->t.token == ':') {
-			ismethod = 1;
-			fieldsel(ls, v);
-	}
-	return ismethod;
-}
-
-static void funcstat(ktap_lexstate *ls, int line)
-{
-	/* funcstat -> FUNCTION funcname body */
-	int ismethod;
-	ktap_expdesc v, b;
-
-	lex_next(ls);  /* skip FUNCTION */
-	ismethod = funcname(ls, &v);
-	body(ls, &b, ismethod, line);
-	codegen_storevar(ls->fs, &v, &b);
-	codegen_fixline(ls->fs, line);  /* definition `happens' in the first line */
-}
-
-static void exprstat(ktap_lexstate *ls)
-{
-	/* stat -> func | assignment */
-	ktap_funcstate *fs = ls->fs;
-	struct LHS_assign v;
-
-	suffixedexp(ls, &v.v);
-	/* stat -> assignment ? */
-	if (ls->t.token == '=' || ls->t.token == ',' ||
-	    ls->t.token == TK_INCR) {
-		v.prev = NULL;
-		assignment(ls, &v, 1);
-	} else {  /* stat -> func */
-		check_condition(ls, v.v.k == VCALL, "syntax error");
-		SETARG_C(getcode(fs, &v.v), 1);  /* call statement uses no results */
-	}
-}
-
-static void retstat(ktap_lexstate *ls)
-{
-	/* stat -> RETURN [explist] [';'] */
-	ktap_funcstate *fs = ls->fs;
-	ktap_expdesc e;
-	int first, nret;  /* registers with returned values */
-
-	if (block_follow(ls, 1) || ls->t.token == ';')
-		first = nret = 0;  /* return no values */
-	else {
-		nret = explist(ls, &e);  /* optional return values */
-		if (hasmultret(e.k)) {
-			codegen_setmultret(fs, &e);
-			if (e.k == VCALL && nret == 1) {  /* tail call? */
-				SET_OPCODE(getcode(fs,&e), OP_TAILCALL);
-				ktap_assert(GETARG_A(getcode(fs,&e)) == fs->nactvar);
-			}
-			first = fs->nactvar;
-			nret = KTAP_MULTRET;  /* return all values */
-		} else {
-			if (nret == 1)  /* only one single value? */
-				first = codegen_exp2anyreg(fs, &e);
-			else {
-				codegen_exp2nextreg(fs, &e);  /* values must go to the `stack' */
-				first = fs->nactvar;  /* return all `active' values */
-				ktap_assert(nret == fs->freereg - first);
-			}
-		}
-	}
-	codegen_ret(fs, first, nret);
-	testnext(ls, ';');  /* skip optional semicolon */
-}
-
-static void tracestat(ktap_lexstate *ls)
-{
-	ktap_expdesc v0, key, args;
-	ktap_expdesc *v = &v0;
-	ktap_string *kdebug_str = ktapc_ts_new("kdebug");
-	ktap_string *probe_str = ktapc_ts_new("probe_by_id");
-	ktap_string *probe_end_str = ktapc_ts_new("probe_end");
-	ktap_funcstate *fs = ls->fs;
-	int token = ls->t.token;
-	int line = ls->linenumber;
-	int base, nparams;
-
-	if (token == TK_TRACE)
-		lex_read_string_until(ls, '{');
-	else
-		lex_next(ls);  /* skip "trace_end" keyword */
-
-	/* kdebug */
-	singlevaraux(fs, ls->envn, v, 1);  /* get environment variable */
-	codestring(ls, &key, kdebug_str);  /* key is variable name */
-	codegen_indexed(fs, v, &key);  /* env[varname] */
-
-	/* fieldsel: kdebug.probe */
-	codegen_exp2anyregup(fs, v);
-	if (token == TK_TRACE)
-		codestring(ls, &key, probe_str);
-	else if (token == TK_TRACE_END)
-		codestring(ls, &key, probe_end_str);
-	codegen_indexed(fs, v, &key);
-
-	/* funcargs*/
-	codegen_exp2nextreg(fs, v);
-
-	if (token == TK_TRACE) {
-		/* argument: EVENTDEF string */
-		check(ls, TK_STRING);
-		enterlevel(ls);
-		ktap_string *ts = ktapc_parse_eventdef(ls->t.seminfo.ts);
-		check_condition(ls, ts != NULL, "Cannot parse eventdef");
-		codestring(ls, &args, ts);
-		lex_next(ls);  /* skip EVENTDEF string */
-		leavelevel(ls);
-
-		codegen_exp2nextreg(fs, &args); /* for next argument */
-	}
-
-	/* argument: callback function */
-	enterlevel(ls);
-	func_body_no_args(ls, &args, ls->linenumber);
-	leavelevel(ls);
-
-	codegen_setmultret(fs, &args);
-
-	base = v->u.info;  /* base register for call */
-	if (hasmultret(args.k))
-		nparams = KTAP_MULTRET;  /* open call */
-	else {
-		codegen_exp2nextreg(fs, &args);  /* close last argument */
-		nparams = fs->freereg - (base+1);
-	}
-	init_exp(v, VCALL, codegen_codeABC(fs, OP_CALL, base, nparams+1, 2));
-	codegen_fixline(fs, line);
-	fs->freereg = base+1;
-
-	check_condition(ls, v->k == VCALL, "syntax error");
-	SETARG_C(getcode(fs, v), 1);  /* call statement uses no results */
-}
-
-static void timerstat(ktap_lexstate *ls)
-{
-	ktap_expdesc v0, key, args;
-	ktap_expdesc *v = &v0;
-	ktap_funcstate *fs = ls->fs;
-	ktap_string *token_str = ls->t.seminfo.ts;
-	ktap_string *interval_str;
-	int line = ls->linenumber;
-	int base, nparams;
-
-	lex_next(ls);  /* skip profile/tick keyword */
-	check(ls, '-');
-
-	lex_read_string_until(ls, '{');
-	interval_str = ls->t.seminfo.ts;
-
-	//printf("timerstat str: %s\n", getstr(interval_str));
-	//exit(0);
-
-	/* timer */
-	singlevaraux(fs, ls->envn, v, 1);  /* get environment variable */
-	codestring(ls, &key, ktapc_ts_new("timer"));  /* key is variable name */
-	codegen_indexed(fs, v, &key);  /* env[varname] */
-
-	/* fieldsel: timer.profile, timer.tick */
-	codegen_exp2anyregup(fs, v);
-	codestring(ls, &key, token_str);
-	codegen_indexed(fs, v, &key);
-
-	/* funcargs*/
-	codegen_exp2nextreg(fs, v);
-
-	/* argument: interval string */
-	check(ls, TK_STRING);
-	enterlevel(ls);
-	codestring(ls, &args, interval_str);
-	lex_next(ls);  /* skip interval string */
-	leavelevel(ls);
-
-	codegen_exp2nextreg(fs, &args); /* for next argument */
-
-	/* argument: callback function */
-	enterlevel(ls);
-	func_body_no_args(ls, &args, ls->linenumber);
-	leavelevel(ls);
-
-	codegen_setmultret(fs, &args);
-
-	base = v->u.info;  /* base register for call */
-	if (hasmultret(args.k))
-		nparams = KTAP_MULTRET;  /* open call */
-	else {
-		codegen_exp2nextreg(fs, &args);  /* close last argument */
-		nparams = fs->freereg - (base+1);
-	}
-	init_exp(v, VCALL, codegen_codeABC(fs, OP_CALL, base, nparams+1, 2));
-	codegen_fixline(fs, line);
-	fs->freereg = base+1;
-
-	check_condition(ls, v->k == VCALL, "syntax error");
-	SETARG_C(getcode(fs, v), 1);  /* call statement uses no results */
-}
-
-static void statement(ktap_lexstate *ls)
-{
-	int line = ls->linenumber;  /* may be needed for error messages */
-
-	enterlevel(ls);
-	switch (ls->t.token) {
-	case ';': {  /* stat -> ';' (empty statement) */
-		lex_next(ls);  /* skip ';' */
-		break;
-	}
-	case TK_IF: {  /* stat -> ifstat */
-		ifstat(ls, line);
-		break;
-	}
-	case TK_WHILE: {  /* stat -> whilestat */
-		whilestat(ls, line);
-		break;
-	}
-	case TK_DO: {  /* stat -> DO block END */
-		lex_next(ls);  /* skip DO */
-		block(ls);
-		check_match(ls, TK_END, TK_DO, line);
-		break;
-	}
-	case TK_FOR: {  /* stat -> forstat */
-		forstat(ls, line);
-		break;
-	}
-	case TK_REPEAT: {  /* stat -> repeatstat */
-		repeatstat(ls, line);
-		break;
-	}
-	case TK_FUNCTION: {  /* stat -> funcstat */
-		funcstat(ls, line);
-		break;
-	}
-	case TK_LOCAL: {  /* stat -> localstat */
-		lex_next(ls);  /* skip LOCAL */
-		if (testnext(ls, TK_FUNCTION))  /* local function? */
-			localfunc(ls);
-		else
-			localstat(ls);
-		break;
-	}
-	case TK_DBCOLON: {  /* stat -> label */
-		lex_next(ls);  /* skip double colon */
-		labelstat(ls, str_checkname(ls), line);
-		break;
-	}
-	case TK_RETURN: {  /* stat -> retstat */
-		lex_next(ls);  /* skip RETURN */
-		retstat(ls);
-		break;
-	}
-	case TK_BREAK:   /* stat -> breakstat */
-	case TK_GOTO: {  /* stat -> 'goto' NAME */
-		gotostat(ls, codegen_jump(ls->fs));
-		break;
-	}
-
-	case TK_TRACE:
-	case TK_TRACE_END:
-		tracestat(ls);
-		break;
-	case TK_PROFILE:
-	case TK_TICK:
-		timerstat(ls);
-		break;
-	default: {  /* stat -> func | assignment */
-		exprstat(ls);
-		break;
-	}
-	}
-	//ktap_assert(ls->fs->f->maxstacksize >= ls->fs->freereg &&
-	//	ls->fs->freereg >= ls->fs->nactvar);
-	ls->fs->freereg = ls->fs->nactvar;  /* free registers */
-	leavelevel(ls);
-}
-/* }====================================================================== */
-
-/*
- * compiles the main function, which is a regular vararg function with an upvalue
- */
-static void mainfunc(ktap_lexstate *ls, ktap_funcstate *fs)
-{
-	ktap_blockcnt bl;
-	ktap_expdesc v;
-
-	open_func(ls, fs, &bl);
-	fs->f->is_vararg = 1;  /* main function is always vararg */
-	init_exp(&v, VLOCAL, 0);  /* create and... */
-	newupvalue(fs, ls->envn, &v);  /* ...set environment upvalue */
-	lex_next(ls);  /* read first token */
-	statlist(ls);  /* parse main body */
-	check(ls, TK_EOS);
-	close_func(ls);
-}
-
-ktap_closure *ktapc_parser(char *ptr, const char *name)
-{
-	ktap_lexstate lexstate;
-	ktap_funcstate funcstate;
-	ktap_dyndata dyd;
-	ktap_mbuffer buff;
-	int firstchar = *ptr++;
-	ktap_closure *cl = ktapc_newlclosure(1);  /* create main closure */
-
-	memset(&lexstate, 0, sizeof(ktap_lexstate));
-	memset(&funcstate, 0, sizeof(ktap_funcstate));
-	funcstate.f = cl->l.p = ktapc_newproto();
-	funcstate.f->source = ktapc_ts_new(name);  /* create and anchor ktap_string */
-
-	lex_init();
-
-	mbuff_init(&buff);
-	memset(&dyd, 0, sizeof(ktap_dyndata));
-	lexstate.buff = &buff;
-	lexstate.dyd = &dyd;
-	lex_setinput(&lexstate, ptr, funcstate.f->source, firstchar);
-
-	mainfunc(&lexstate, &funcstate);
-
-	ktap_assert(!funcstate.prev && funcstate.nups == 1 && !lexstate.fs);
-
-	/* all scopes should be correctly finished */
-	ktap_assert(dyd.actvar.n == 0 && dyd.gt.n == 0 && dyd.label.n == 0);
-	return cl;
-}
-
diff --git a/drivers/staging/ktap/userspace/util.c b/drivers/staging/ktap/userspace/util.c
deleted file mode 100644
index 8124de9..0000000
--- a/drivers/staging/ktap/userspace/util.c
+++ /dev/null
@@ -1,346 +0,0 @@
-/*
- * util.c
- *
- * This file is part of ktap by Jovi Zhangwei.
- *
- * Copyright (C) 2012-2013 Jovi Zhangwei <jovi.zhangwei@gmail.com>.
- *
- * Copyright (C) 1994-2013 Lua.org, PUC-Rio.
- *  - The part of code in this file is copied from lua initially.
- *  - lua's MIT license is compatible with GPL.
- *
- * ktap is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * ktap is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include "../include/ktap_types.h"
-#include "ktapc.h"
-
-/*
- * converts an integer to a "floating point byte", represented as
- * (eeeeexxx), where the real value is (1xxx) * 2^(eeeee - 1) if
- * eeeee != 0 and (xxx) otherwise.
- */
-int ktapc_int2fb(unsigned int x)
-{
-	int e = 0;  /* exponent */
-
-	if (x < 8)
-		return x;
-	while (x >= 0x10) {
-		x = (x+1) >> 1;
-		e++;
-	}
-	return ((e+1) << 3) | ((int)x - 8);
-}
-
-/* converts back */
-int ktapc_fb2int(int x)
-{
-	int e = (x >> 3) & 0x1f;
-
-	if (e == 0)
-		return x;
-	else
-		return ((x & 7) + 8) << (e - 1);
-}
-
-int ktapc_ceillog2(unsigned int x)
-{
-	static const u8 log_2[256] = {
-	0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
-	6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
-	7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
-	7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
-	8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-	8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-	8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-	8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8
-	};
-	int l = 0;
-
-	x--;
-	while (x >= 256) {
-		l += 8;
-		x >>= 8;
-	}
-	return l + log_2[x];
-}
-
-ktap_number ktapc_arith(int op, ktap_number v1, ktap_number v2)
-{
-	switch (op) {
-	case KTAP_OPADD: return NUMADD(v1, v2);
-	case KTAP_OPSUB: return NUMSUB(v1, v2);
-	case KTAP_OPMUL: return NUMMUL(v1, v2);
-	case KTAP_OPDIV: return NUMDIV(v1, v2);
-	case KTAP_OPMOD: return NUMMOD(v1, v2);
-	//case KTAP_OPPOW: return NUMPOW(v1, v2);
-	case KTAP_OPUNM: return NUMUNM(v1);
-	default: ktap_assert(0); return 0;
-	}
-}
-
-int ktapc_hexavalue(int c)
-{
-	if (isdigit(c))
-		return c - '0';
-	else
-		return tolower(c) - 'a' + 10;
-}
-
-static int isneg(const char **s)
-{
-	if (**s == '-') {
-		(*s)++;
-		return 1;
-	} else if (**s == '+')
-		(*s)++;
-
-	return 0;
-}
-
-static ktap_number readhexa(const char **s, ktap_number r, int *count)
-{
-	for (; isxdigit((unsigned char)(**s)); (*s)++) {  /* read integer part */
-		r = (r * 16.0) + (ktap_number)(ktapc_hexavalue((unsigned char)(**s)));
-		(*count)++;
-	}
-
-	return r;
-}
-
-/*
- * convert an hexadecimal numeric string to a number, following
- * C99 specification for 'strtod'
- */
-static ktap_number strx2number(const char *s, char **endptr)
-{
-	ktap_number r = 0.0;
-	int e = 0, i = 0;
-	int neg = 0;  /* 1 if number is negative */
-
-	*endptr = (char *)s;  /* nothing is valid yet */
-	while (isspace((unsigned char)(*s)))
-		s++;  /* skip initial spaces */
-
-	neg = isneg(&s);  /* check signal */
-	if (!(*s == '0' && (*(s + 1) == 'x' || *(s + 1) == 'X')))  /* check '0x' */
-		return 0.0;  /* invalid format (no '0x') */
-
-	s += 2;  /* skip '0x' */
-	r = readhexa(&s, r, &i);  /* read integer part */
-	if (*s == '.') {
-		s++;  /* skip dot */
-		r = readhexa(&s, r, &e);  /* read fractional part */
-	}
-
-	if (i == 0 && e == 0)
-		return 0.0;  /* invalid format (no digit) */
-	e *= -4;  /* each fractional digit divides value by 2^-4 */
-	*endptr = (char *)s;  /* valid up to here */
-
-	if (*s == 'p' || *s == 'P') {  /* exponent part? */
-		int exp1 = 0;
-		int neg1;
-
-		s++;  /* skip 'p' */
-		neg1 = isneg(&s);  /* signal */
-		if (!isdigit((unsigned char)(*s)))
-			goto ret;  /* must have at least one digit */
-		while (isdigit((unsigned char)(*s)))  /* read exponent */
-			exp1 = exp1 * 10 + *(s++) - '0';
-		if (neg1) exp1 = -exp1;
-			e += exp1;
-	}
-
-	*endptr = (char *)s;  /* valid up to here */
- ret:
-	if (neg)
-		r = -r;
-
-	return ldexp(r, e);
-}
-
-int ktapc_str2d(const char *s, size_t len, ktap_number *result)
-{
-	char *endptr;
-
-	if (strpbrk(s, "nN"))  /* reject 'inf' and 'nan' */
-		return 0;
-	else if (strpbrk(s, "xX"))  /* hexa? */
-		*result = strx2number(s, &endptr);
-	else
-		*result = strtod(s, &endptr);
-
-	if (endptr == s)
-		return 0;  /* nothing recognized */
-	while (isspace((unsigned char)(*endptr)))
-		endptr++;
-	return (endptr == s + len);  /* OK if no trailing characters */
-}
-
-/* number of chars of a literal string without the ending \0 */
-#define LL(x)	(sizeof(x)/sizeof(char) - 1)
-
-#define RETS	"..."
-#define PRE	"[string \""
-#define POS	"\"]"
-
-#define addstr(a,b,l)	( memcpy(a,b,(l) * sizeof(char)), a += (l) )
-
-void ktapc_chunkid(char *out, const char *source, size_t bufflen)
-{
-	size_t l = strlen(source);
-
-	if (*source == '=') {  /* 'literal' source */
-		if (l <= bufflen)  /* small enough? */
-			memcpy(out, source + 1, l * sizeof(char));
-		else {  /* truncate it */
-			addstr(out, source + 1, bufflen - 1);
-			*out = '\0';
-		}
-	} else if (*source == '@') {  /* file name */
-		if (l <= bufflen)  /* small enough? */
-			memcpy(out, source + 1, l * sizeof(char));
-		else {  /* add '...' before rest of name */
-			addstr(out, RETS, LL(RETS));
-			bufflen -= LL(RETS);
-			memcpy(out, source + 1 + l - bufflen, bufflen * sizeof(char));
-		}
-	} else {  /* string; format as [string "source"] */
-		const char *nl = strchr(source, '\n');  /* find first new line (if any) */
-		addstr(out, PRE, LL(PRE));  /* add prefix */
-		bufflen -= LL(PRE RETS POS) + 1;  /* save space for prefix+suffix+'\0' */
-		if (l < bufflen && nl == NULL) {  /* small one-line source? */
-			addstr(out, source, l);  /* keep it */
-		} else {
-			if (nl != NULL)
-				l = nl - source;  /* stop at first newline */
-			if (l > bufflen)
-				l = bufflen;
-			addstr(out, source, l);
-			addstr(out, RETS, LL(RETS));
-		}
-		memcpy(out, POS, (LL(POS) + 1) * sizeof(char));
-	}
-}
-
-
-/*
- * strglobmatch is copyed from perf(linux/tools/perf/util/string.c)
- */
-
-/* Character class matching */
-static bool __match_charclass(const char *pat, char c, const char **npat)
-{
-	bool complement = false, ret = true;
-
-	if (*pat == '!') {
-		complement = true;
-		pat++;
-	}
-	if (*pat++ == c)	/* First character is special */
-		goto end;
-
-	while (*pat && *pat != ']') {	/* Matching */
-		if (*pat == '-' && *(pat + 1) != ']') {	/* Range */
-			if (*(pat - 1) <= c && c <= *(pat + 1))
-				goto end;
-			if (*(pat - 1) > *(pat + 1))
-				goto error;
-			pat += 2;
-		} else if (*pat++ == c)
-			goto end;
-	}
-	if (!*pat)
-		goto error;
-	ret = false;
-
-end:
-	while (*pat && *pat != ']')	/* Searching closing */
-		pat++;
-	if (!*pat)
-		goto error;
-	*npat = pat + 1;
-	return complement ? !ret : ret;
-
-error:
-	return false;
-}
-
-/* Glob/lazy pattern matching */
-static bool __match_glob(const char *str, const char *pat, bool ignore_space)
-{
-	while (*str && *pat && *pat != '*') {
-		if (ignore_space) {
-			/* Ignore spaces for lazy matching */
-			if (isspace(*str)) {
-				str++;
-				continue;
-			}
-			if (isspace(*pat)) {
-				pat++;
-				continue;
-			}
-		}
-		if (*pat == '?') {	/* Matches any single character */
-			str++;
-			pat++;
-			continue;
-		} else if (*pat == '[')	/* Character classes/Ranges */
-			if (__match_charclass(pat + 1, *str, &pat)) {
-				str++;
-				continue;
-			} else
-				return false;
-		else if (*pat == '\\') /* Escaped char match as normal char */
-			pat++;
-		if (*str++ != *pat++)
-			return false;
-	}
-	/* Check wild card */
-	if (*pat == '*') {
-		while (*pat == '*')
-			pat++;
-		if (!*pat)	/* Tail wild card matches all */
-			return true;
-		while (*str)
-			if (__match_glob(str++, pat, ignore_space))
-				return true;
-	}
-	return !*str && !*pat;
-}
-
-/**
- * strglobmatch - glob expression pattern matching
- * @str: the target string to match
- * @pat: the pattern string to match
- *
- * This returns true if the @str matches @pat. @pat can includes wildcards
- * ('*','?') and character classes ([CHARS], complementation and ranges are
- * also supported). Also, this supports escape character ('\') to use special
- * characters as normal character.
- *
- * Note: if @pat syntax is broken, this always returns false.
- */
-bool strglobmatch(const char *str, const char *pat)
-{
-	return __match_glob(str, pat, false);
-}
-