[tip:locking/rwsem] locking/rwsem, x86: Add frame annotation for call_rwsem_down_write_failed_killable()

[tip-bot for Michal Hocko]

Commit-ID:  00fb16e26ac8559e69c3bb14284f4a548d28ee0d
Gitweb:     http://git.kernel.org/tip/00fb16e26ac8559e69c3bb14284f4a548d28ee0d
Author:     Michal Hocko <mhocko@xxxxxxxx>
AuthorDate: Wed, 13 Apr 2016 11:57:12 +0200
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 22 Apr 2016 08:58:41 +0200

locking/rwsem, x86: Add frame annotation for call_rwsem_down_write_failed_killable()

3387a535ce62 ("x86/asm: Create stack frames in rwsem functions") has
added FRAME_{BEGIN,END} annotations to rwsem asm stubs. The patch
which has added call_rwsem_down_write_failed_killable() was based on an
older tree so it didn't know about annotations. Let's add them.

This addresses the following objtool warning:

  arch/x86/lib/rwsem.o: warning: objtool: call_rwsem_down_write_failed_killable()+0xe: call without frame pointer save/setup

Reported-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: linux-mm@xxxxxxxxx
Link: http://lkml.kernel.org/r/1460541432-21631-1-git-send-email-mhocko@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/x86/lib/rwsem.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/lib/rwsem.S b/arch/x86/lib/rwsem.S
index 4534a7e..a37462a 100644
--- a/arch/x86/lib/rwsem.S
+++ b/arch/x86/lib/rwsem.S
@@ -107,10 +107,12 @@ ENTRY(call_rwsem_down_write_failed)
 ENDPROC(call_rwsem_down_write_failed)
 
 ENTRY(call_rwsem_down_write_failed_killable)
+	FRAME_BEGIN
 	save_common_regs
 	movq %rax,%rdi
 	call rwsem_down_write_failed_killable
 	restore_common_regs
+	FRAME_END
 	ret
 ENDPROC(call_rwsem_down_write_failed_killable)