From: Andi Kleen <ak@suse.de>
Date: Tue, 26 Sep 2006 08:52:29 +0000 (+0200)
Subject: [PATCH] i386: add alternative-asm.h to allow LOCK_PREFIX replacement in .S files
X-Git-Tag: v2.6.19-rc1~1077^2~185
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=07c9819b31eda7954feddc83f2fae035f31c11e1;p=linux-2.6

[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
index 0000000000..6c47e3b948
--- /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