[Xen-devel] [PATCH] x86: adjust placement of pause insn in _raw_spin_lock()

["Jan Beulich" <jbeulich@xxxxxxxxxx>]

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

Index: 2008-08-06/xen/include/asm-x86/spinlock.h
===================================================================
--- 2008-08-06.orig/xen/include/asm-x86/spinlock.h      2007-09-10 
09:59:37.000000000 +0200
+++ 2008-08-06/xen/include/asm-x86/spinlock.h   2008-08-07 12:36:13.000000000 
+0200
@@ -23,8 +23,8 @@ static inline void _raw_spin_lock(spinlo
         "1:  lock; decb %0         \n"
         "    js 2f                 \n"
         ".section .text.lock,\"ax\"\n"
-        "2:  cmpb $0,%0            \n"
-        "    rep; nop              \n"
+        "2:  rep; nop              \n"
+        "    cmpb $0,%0            \n"
         "    jle 2b                \n"
         "    jmp 1b                \n"
         ".previous"




_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel