فهرست منبع

[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>
Andi Kleen 18 سال پیش
والد
کامیت
01215ad8d8
1فایلهای تغییر یافته به همراه4 افزوده شده و 12 حذف شده
  1. 4 12
      include/asm-i386/mutex.h

+ 4 - 12
include/asm-i386/mutex.h

@@ -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");				\