diff options
| author | Andy Lutomirski <luto@kernel.org> | 2015-10-06 00:47:54 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-10-07 09:34:07 (GMT) |
| commit | 72f924783b8a87e4454516520ffb5f35e4930371 (patch) | |
| tree | ff035a2d36cb63f0d34d49ac55626e853494b79a /arch/x86/entry | |
| parent | dd27f998f0ed3c797032a82033fa191be7c61e4c (diff) | |
| download | linux-72f924783b8a87e4454516520ffb5f35e4930371.tar.xz | |
x86/entry, locking/lockdep: Move lockdep_sys_exit() to prepare_exit_to_usermode()
Rather than worrying about exactly where LOCKDEP_SYS_EXIT should
go in the asm code, add it to prepare_exit_from_usermode() and
remove all of the asm calls that are followed by
prepare_exit_to_usermode().
LOCKDEP_SYS_EXIT now appears only in the syscall fast paths.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1736ebe948b845e68120b86b89091f3ec27f5e8e.1444091584.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/common.c | 2 | ||||
| -rw-r--r-- | arch/x86/entry/entry_32.S | 2 | ||||
| -rw-r--r-- | arch/x86/entry/entry_64.S | 1 |
3 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index 80dcc92..d94a60c 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -220,6 +220,8 @@ __visible void prepare_exit_to_usermode(struct pt_regs *regs) if (WARN_ON(!irqs_disabled())) local_irq_disable(); + lockdep_sys_exit(); + /* * In order to return to user mode, we need to have IRQs off with * none of _TIF_SIGPENDING, _TIF_NOTIFY_RESUME, _TIF_USER_RETURN_NOTIFY, diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index b2909bf..a08ded4 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -255,7 +255,6 @@ ret_from_intr: jb resume_kernel # not returning to v8086 or userspace ENTRY(resume_userspace) - LOCKDEP_SYS_EXIT DISABLE_INTERRUPTS(CLBR_ANY) TRACE_IRQS_OFF movl %esp, %eax @@ -372,7 +371,6 @@ syscall_call: syscall_after_call: movl %eax, PT_EAX(%esp) # store the return value syscall_exit: - LOCKDEP_SYS_EXIT jmp syscall_exit_work restore_all: diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 055a01d..7dc2850 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -557,7 +557,6 @@ ret_from_intr: jz retint_kernel /* Interrupt came from user space */ - LOCKDEP_SYS_EXIT_IRQ GLOBAL(retint_user) mov %rsp,%rdi call prepare_exit_to_usermode |