[PATCH] i386: Define per_cpu_offset

Define per_cpu_offset in asm-i386/percpu.h when SMP defined, like
asm-generic/percpu.h does for UP.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Andi Kleen <ak@suse.de>

include/asm-i386/percpu.h

@@ -47,6 +47,8 @@
 /* This is used for other cpus to find our section. */
 extern unsigned long __per_cpu_offset[];
 
+#define per_cpu_offset(x) (__per_cpu_offset[x])
+
 /* Separate out the type, so (int[3], foo) works. */
 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
 #define DEFINE_PER_CPU(type, name) \