[PATCH] i386: workaround for a -Wmissing-prototypes warning

Work around a warning with -Wmissing-prototypes in
arch/i386/kernel/asm-offsets.c

The warning isn't gcc's fault - asm-offsets.c is simply a special file.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

arch/i386/kernel/asm-offsets.c

@@ -25,6 +25,9 @@
 #define OFFSET(sym, str, mem) \
 	DEFINE(sym, offsetof(struct str, mem));
 
+/* workaround for a warning with -Wmissing-prototypes */
+void foo(void);
+
 void foo(void)
 {
 	OFFSET(SIGCONTEXT_eax, sigcontext, eax);