1 files changed, 13 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 076463cb21ba..61290ea721c8 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1128,6 +1128,19 @@ again:
 		list_del(&page->lru);
 		pcp->count--;
 	} else {
+		if (unlikely(gfp_flags & __GFP_NOFAIL)) {
+			/*
+			 * __GFP_NOFAIL is not to be used in new code.
+			 *
+			 * All __GFP_NOFAIL callers should be fixed so that they
+			 * properly detect and handle allocation failures.
+			 *
+			 * We most definitely don't want callers attempting to
+			 * allocate greater than single-page units with
+			 * __GFP_NOFAIL.
+			 */
+			WARN_ON_ONCE(order > 0);
+		}
 		spin_lock_irqsave(&zone->lock, flags);
 		page = __rmqueue(zone, order, migratetype);
 		__mod_zone_page_state(zone, NR_FREE_PAGES, -(1 << order));