[PATCH 2/2] m68k: add memcmp() declarartion

[Arnd Bergmann <arnd@kernel.org>]

From: Arnd Bergmann <arnd@arndb.de>

There is a global definition of memcmp() that gets built on m68k but is never
used and causes a warning because of the missing prototype:

lib/string.c:671:15: error: no previous prototype for 'memcmp' [-Werror=missing-prototypes]

Add the corresponding declaration to avoid the warning. As far as I understand
the #define to redirect memcmp() to __builtin_memcmp() does not actually do anything
here since this is what it does anyway.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/m68k/include/asm/string.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/m68k/include/asm/string.h b/arch/m68k/include/asm/string.h
index f0f5021d6327d..760cc13acdf41 100644
--- a/arch/m68k/include/asm/string.h
+++ b/arch/m68k/include/asm/string.h
@@ -41,6 +41,7 @@ static inline char *strncpy(char *dest, const char *src, size_t n)
 #define __HAVE_ARCH_MEMMOVE
 extern void *memmove(void *, const void *, __kernel_size_t);
 
+extern int memcmp(const void *, const void *, __kernel_size_t);
 #define memcmp(d, s, n) __builtin_memcmp(d, s, n)
 
 #define __HAVE_ARCH_MEMSET
-- 
2.39.2