[PATCH] shm: CONFIG_SHMEM=n build fix

Fix bug found by Grant Coady <lkml@dodo.com.au>'s autobuild setup.

shmem_set_policy() and shmem_get_policy() are macros if !CONFIG_SHMEM, so this
doesn't work.
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

ipc/shm.c

@@ -170,7 +170,7 @@ static struct vm_operations_struct shm_vm_ops = {
 	.open	= shm_open,	/* callback for a new vm-area open */
 	.close	= shm_close,	/* callback for when the vm-area is released */
 	.nopage	= shmem_nopage,
-#ifdef CONFIG_NUMA
+#if defined(CONFIG_NUMA) && defined(CONFIG_SHMEM)
 	.set_policy = shmem_set_policy,
 	.get_policy = shmem_get_policy,
 #endif