[PATCH for review] [42/145] i386: add alternative-asm.h to allow LOCK_PREFIX replacement in .S files

Andi Kleen
2006-08-10T20:22:31Z

r

LOCK_PREFIX is replaced by nops on UP systems, so it has to be a special
macro. Previously this was only possible from C. Allow it for pure
assembly files too. Similar to earlier x86-64 patch.
Signed-off-by: Andi Kleen <ak@suse.de>

---
include/asm-i386/alternative-asm.i | 14 ++++++++++++++
1 files changed, 14 insertions(+)

Index: linux/include/asm-i386/alternative-asm.i
===================================================================
--- /dev/null
+++ linux/include/asm-i386/alternative-asm.i
@@ -0,0 +1,14 @@
+#include <linux/config.h>
+
+#ifdef CONFIG_SMP
+ .macro LOCK_PREFIX
+1: lock
+ .section .smp_locks,"a"
+ .align 4
+ .long 1b
+ .previous
+ .endm
+#else
+ .macro LOCK_PREFIX
+ .endm
+#endif