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authorJan Beulich <JBeulich@suse.com>2014-09-24 09:40:14 +0200
committerThomas Gleixner <tglx@linutronix.de>2014-10-08 10:05:49 +0200
commit5f1d919a8ca15f450c749227bc5e2e18f3cbfdb4 (patch)
tree00c028d32d6c9f97740271ee5645607ce6ae7b6d /arch/x86/lib/cmpxchg8b_emu.S
parentx86: Improve cmpxchg16b_emu.S (diff)
downloadlinux-5f1d919a8ca15f450c749227bc5e2e18f3cbfdb4.tar.xz
linux-5f1d919a8ca15f450c749227bc5e2e18f3cbfdb4.zip
x86: Improve cmpxchg8b_emu.S
- don't include unneeded headers - drop redundant entry point label - complete unwind annotations - use .L prefix on local labels to not clutter the symbol table Signed-off-by: Jan Beulich <jbeulich@suse.com> Link: http://lkml.kernel.org/r/5422917E0200007800038081@mail.emea.novell.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/lib/cmpxchg8b_emu.S')
-rw-r--r--arch/x86/lib/cmpxchg8b_emu.S20
1 files changed, 9 insertions, 11 deletions
diff --git a/arch/x86/lib/cmpxchg8b_emu.S b/arch/x86/lib/cmpxchg8b_emu.S
index 828cb710dec2..b4807fce5177 100644
--- a/arch/x86/lib/cmpxchg8b_emu.S
+++ b/arch/x86/lib/cmpxchg8b_emu.S
@@ -7,11 +7,8 @@
*/
#include <linux/linkage.h>
-#include <asm/alternative-asm.h>
-#include <asm/frame.h>
#include <asm/dwarf2.h>
-
.text
/*
@@ -30,27 +27,28 @@ CFI_STARTPROC
# set the whole ZF thing (caller will just compare
# eax:edx with the expected value)
#
-cmpxchg8b_emu:
- pushfl
+ pushfl_cfi
cli
cmpl (%esi), %eax
- jne not_same
+ jne .Lnot_same
cmpl 4(%esi), %edx
- jne half_same
+ jne .Lhalf_same
movl %ebx, (%esi)
movl %ecx, 4(%esi)
- popfl
+ CFI_REMEMBER_STATE
+ popfl_cfi
ret
- not_same:
+ CFI_RESTORE_STATE
+.Lnot_same:
movl (%esi), %eax
- half_same:
+.Lhalf_same:
movl 4(%esi), %edx
- popfl
+ popfl_cfi
ret
CFI_ENDPROC