[PATCH] i386: add alternative-asm.h to allow LOCK_PREFIX replacement in .S files

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>

diff --git a/include/asm-i386/alternative-asm.i b/include/asm-i386/alternative-asm.i
new file mode 100644 (file)
index 0000000..6c47e3b
--- /dev/null
+++ b/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