[PATCH] Fix shmem.c stubs

Fix the build with CONFIG_SHMEM=n
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/linux/mm.h

@@ -528,7 +528,7 @@ struct mempolicy *shmem_get_policy(struct vm_area_struct *vma,
 int shmem_lock(struct file *file, int lock, struct user_struct *user);
 #else
 #define shmem_nopage filemap_nopage
-#define shmem_lock(a, b) /* always in memory, no need to lock */
+#define shmem_lock(a, b, c) 	({0;})	/* always in memory, no need to lock */
 #define shmem_set_policy(a, b)	(0)
 #define shmem_get_policy(a, b)	(NULL)
 #endif