linux-kernel - [tip:locking/rwsem] locking/rwsem, x86: Add frame annotation for call_rwsem_down_write_failed

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Date:	Fri, 22 Apr 2016 02:44:40 -0700
From:	tip-bot for Michal Hocko <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, linux-kernel@...r.kernel.org,
	peterz@...radead.org, mingo@...nel.org, mhocko@...e.com,
	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	hpa@...or.com
Subject: [tip:locking/rwsem] locking/rwsem, x86: Add frame annotation for
 call_rwsem_down_write_failed_killable()

Commit-ID:  00fb16e26ac8559e69c3bb14284f4a548d28ee0d
Gitweb:     http://git.kernel.org/tip/00fb16e26ac8559e69c3bb14284f4a548d28ee0d
Author:     Michal Hocko <mhocko@...e.com>
AuthorDate: Wed, 13 Apr 2016 11:57:12 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
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@...nel.org>
Signed-off-by: Michal Hocko <mhocko@...e.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-arch@...r.kernel.org
Cc: linux-mm@...ck.org
Link: http://lkml.kernel.org/r/1460541432-21631-1-git-send-email-mhocko@kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 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)