mm/page_alloc.c:3165: warning: no return statement in function returning non-void
mm/page_alloc.c:3165: warning: control reaches end of non-void function

Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Shaohua Li <shaohua.li@intel.com>
Cc: Yakui Zhao <yakui.zhao@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>