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Commit 01215ad8 authored Sep 26, 2006 by Andi Kleen Committed by Andi Kleen Sep 26, 2006

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



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>

parent 0577f148

include/asm-i386/mutex.h

+4 −12

Original line number	Diff line number	Diff line
		@@ -30,14 +30,10 @@ do { \
		\
		__asm__ __volatile__( \
		LOCK_PREFIX " decl (%%eax) \n" \
		" js 2f \n" \
		" jns 1f \n" \
		" call "#fail_fn" \n" \
		"1: \n" \
		\
		LOCK_SECTION_START("") \
		"2: call "#fail_fn" \n" \
		" jmp 1b \n" \
		LOCK_SECTION_END \
		\
		:"=a" (dummy) \
		: "a" (count) \
		: "memory", "ecx", "edx"); \
		@@ -86,14 +82,10 @@ do { \
		\
		__asm__ __volatile__( \
		LOCK_PREFIX " incl (%%eax) \n" \
		" jle 2f \n" \
		" jg 1f \n" \
		" call "#fail_fn" \n" \
		"1: \n" \
		\
		LOCK_SECTION_START("") \
		"2: call "#fail_fn" \n" \
		" jmp 1b \n" \
		LOCK_SECTION_END \
		\
		:"=a" (dummy) \
		: "a" (count) \
		: "memory", "ecx", "edx"); \