Fix: find_or_create_page skips cpuset memory spreading.

We call alloc_page where we should be calling __page_cache_alloc.

__page_cache_alloc performs cpuset memory spreading. alloc_page does not.
There is no reason that pages allocated via find_or_create should be
exempt.

Signed-off-by: Christoph Lameter <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

mm/filemap.c

···
 	page = find_lock_page(mapping, index);
 	if (!page) {
 		if (!cached_page) {
-			cached_page = alloc_page(gfp_mask);
+			cached_page =
+				__page_cache_alloc(gfp_mask);
 			if (!cached_page)
 				return NULL;
 		}