[patch 094/101] lib/stackdepot.c: use __GFP_NOWARN for stack allocations

[patch 094/101] lib/stackdepot.c: use __GFP_NOWARN for stack allocations

[akpm]

From: "Kirill A. Shutemov" <kirill@shutemov.name>
Subject: lib/stackdepot.c: use __GFP_NOWARN for stack allocations

This (large, atomic) allocation attempt can fail.  We expect and handle
that, so avoid the scary warning.

Link: http://lkml.kernel.org/r/20160720151905.GB19146@node.shutemov.name
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Rik van Riel <riel@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 lib/stackdepot.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN lib/stackdepot.c~lib-stackdepotc-use-__gfp_nowarn-for-stack-allocations lib/stackdepot.c
--- a/lib/stackdepot.c~lib-stackdepotc-use-__gfp_nowarn-for-stack-allocations
+++ a/lib/stackdepot.c
@@ -242,6 +242,7 @@ depot_stack_handle_t depot_save_stack(st
 		 */
 		alloc_flags &= ~GFP_ZONEMASK;
 		alloc_flags &= (GFP_ATOMIC | GFP_KERNEL);
+		alloc_flags |= __GFP_NOWARN;
 		page = alloc_pages(alloc_flags, STACK_ALLOC_ORDER);
 		if (page)
 			prealloc = page_address(page);
_