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[PATCH] i386: Remove lock section support in mutex.h

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Lock sections don't work the new dwarf2 unwinder
This generates slightly smaller code. It adds one more taken
jump to the fast path.

Cc: jbeulich@novell.com

Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Andi Kleen 2006-09-26 10:52:31 +02:00 committed by Andi Kleen
parent 0577f148b5
commit 01215ad8d8
1 changed files with 4 additions and 12 deletions
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16
include/asm-i386/mutex.h
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@ -30,14 +30,10 @@ do { \
\ \
__asm__ __volatile__( \ __asm__ __volatile__( \
LOCK_PREFIX " decl (%%eax) \n" \ LOCK_PREFIX " decl (%%eax) \n" \
" js 2f \n" \ " jns 1f \n" \
" call "#fail_fn" \n" \
"1: \n" \ "1: \n" \
\ \
LOCK_SECTION_START("") \
"2: call "#fail_fn" \n" \
" jmp 1b \n" \
LOCK_SECTION_END \
\
:"=a" (dummy) \ :"=a" (dummy) \
: "a" (count) \ : "a" (count) \
: "memory", "ecx", "edx"); \ : "memory", "ecx", "edx"); \
@ -86,14 +82,10 @@ do { \
\ \
__asm__ __volatile__( \ __asm__ __volatile__( \
LOCK_PREFIX " incl (%%eax) \n" \ LOCK_PREFIX " incl (%%eax) \n" \
" jle 2f \n" \ " jg 1f \n" \
" call "#fail_fn" \n" \
"1: \n" \ "1: \n" \
\ \
LOCK_SECTION_START("") \
"2: call "#fail_fn" \n" \
" jmp 1b \n" \
LOCK_SECTION_END \
\
:"=a" (dummy) \ :"=a" (dummy) \
: "a" (count) \ : "a" (count) \
: "memory", "ecx", "edx"); \ : "memory", "ecx", "edx"); \