From: Michal Hocko Date: Thu, 17 Mar 2016 21:19:32 +0000 (-0700) Subject: mm: remove __GFP_NOFAIL is deprecated comment X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0f352e5392c86d054998dd6526f2fdc33ec4bed5;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git mm: remove __GFP_NOFAIL is deprecated comment Commit 647757197cd3 ("mm: clarify __GFP_NOFAIL deprecation status") was incomplete and didn't remove the comment about __GFP_NOFAIL being deprecated in buffered_rmqueue. Let's get rid of this leftover but keep the WARN_ON_ONCE for order > 1 because we should really discourage from using __GFP_NOFAIL with higher order allocations because those are just too subtle. Signed-off-by: Michal Hocko Reviewed-by: Nikolay Borisov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 30134a8f7cc8..30f01c6f6b88 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2350,19 +2350,11 @@ struct page *buffered_rmqueue(struct zone *preferred_zone, 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 order-1 page units with - * __GFP_NOFAIL. - */ - WARN_ON_ONCE(order > 1); - } + /* + * We most definitely don't want callers attempting to + * allocate greater than order-1 page units with __GFP_NOFAIL. + */ + WARN_ON_ONCE((gfp_flags & __GFP_NOFAIL) && (order > 1)); spin_lock_irqsave(&zone->lock, flags); page = NULL;