commit 3013449243adc3421b507696e5d247a3d292ee0c
author Jeff Dike <jdike@addtoit.com> Fri Sep 16 19:28:03 2005 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> Sat Sep 17 11:50:01 2005 -0700
tree 0cabbe21507b1136b84086452f56b5a095adfcf8
parent 2030c0fd3db3332378f95f479c286181e3920644

[PATCH] uml: UML/i386 cmpxchg fix

Using native cmpxchg offers a slight performance improvement in uml/i386.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/Kconfig.i386

diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386
index 8ad156a..5d92cac 100644
--- a/arch/um/Kconfig.i386
+++ b/arch/um/Kconfig.i386
@@ -42,3 +42,7 @@
 config ARCH_REUSE_HOST_VSYSCALL_AREA
 	bool
 	default y
+
+config X86_CMPXCHG
+	bool
+	default y

include/asm-um/system-i386.h

diff --git a/include/asm-um/system-i386.h b/include/asm-um/system-i386.h
index ea8381d..c436263 100644
--- a/include/asm-um/system-i386.h
+++ b/include/asm-um/system-i386.h
@@ -3,6 +3,4 @@
 
 #include "asm/system-generic.h"
     
-#define __HAVE_ARCH_CMPXCHG 1
-
 #endif