From: Kirill A. Shutemov <kirill@shutemov.name>
Date: Thu, 28 Jul 2016 22:49:10 +0000 (-0700)
Subject: lib/stackdepot.c: use __GFP_NOWARN for stack allocations
X-Git-Tag: v4.14-rc1~2792^2~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=87cc271d5e4320d705cfdf59f68d4d037b3511b2;p=platform%2Fkernel%2Flinux-rpi.git

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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/lib/stackdepot.c b/lib/stackdepot.c
index 53ad6c0..60f77f1 100644
--- a/lib/stackdepot.c
+++ b/lib/stackdepot.c
@@ -242,6 +242,7 @@ depot_stack_handle_t depot_save_stack(struct stack_trace *trace,
 		 */
 		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);