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author | Jeff Dike <jdike@addtoit.com> | 2007-10-16 08:26:47 (GMT) |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 16:43:05 (GMT) |
commit | 42daba316557e597a90a730f61c762602b7f0e0c (patch) | |
tree | 9b7e9da84cef7d2547c577f1cf94b408cf308619 /arch/um/os-Linux/Makefile | |
parent | 5c8aaceab88ac787c0a4038b29143c954c2a45e0 (diff) | |
download | linux-fsl-qoriq-42daba316557e597a90a730f61c762602b7f0e0c.tar.xz |
uml: stop saving process FP state
Throw out a lot of code dealing with saving and restoring floating-point
state. In skas mode, where processes run in a restoring floating-point state
on kernel entry and exit is pointless.
This eliminates most of arch/um/os-Linux/sys-{i386,x86_64}/registers.c. Most
of what remained is now arch-indpendent, and can be moved up to
arch/um/os-Linux/registers.c. Both arches need the jmp_buf accessor
get_thread_reg, and i386 needs {save,restore}_fp_regs because it cheats during
sigreturn by getting the fp state using ptrace rather than copying it out of
the process sigcontext.
After this, it turns out that arch/um/include/skas/mode-skas.h is almost
completely unneeded. The declarations in it are variables which either don't
exist or which don't have global scope. The one exception is
kill_off_processes_skas. If that's removed, this header can be deleted.
This uncovered a bug in user.h, which wasn't correctly making sure that a
size_t definition was available to both userspace and kernelspace files.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/os-Linux/Makefile')
-rw-r--r-- | arch/um/os-Linux/Makefile | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile index 2f8c794..f1bb58f 100644 --- a/arch/um/os-Linux/Makefile +++ b/arch/um/os-Linux/Makefile @@ -4,8 +4,8 @@ # obj-y = aio.o elf_aux.o execvp.o file.o helper.o irq.o main.o mem.o process.o \ - sigio.o signal.o start_up.o time.o trap.o tty.o uaccess.o umid.o tls.o \ - user_syms.o util.o drivers/ sys-$(SUBARCH)/ + registers.o sigio.o signal.o start_up.o time.o trap.o tty.o uaccess.o \ + umid.o tls.o user_syms.o util.o drivers/ sys-$(SUBARCH)/ obj-$(CONFIG_MODE_SKAS) += skas/ @@ -16,8 +16,8 @@ obj-$(CONFIG_TTY_LOG) += tty_log.o user-objs-$(CONFIG_TTY_LOG) += tty_log.o USER_OBJS := $(user-objs-y) aio.o elf_aux.o execvp.o file.o helper.o irq.o \ - main.o mem.o process.o sigio.o signal.o start_up.o time.o trap.o tty.o \ - tls.o uaccess.o umid.o util.o + main.o mem.o process.o registers.o sigio.o signal.o start_up.o time.o \ + trap.o tty.o tls.o uaccess.o umid.o util.o CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH) |