From: Christoph Hellwig <hch@lst.de>
Date: Mon, 29 Apr 2024 08:28:28 +0000 (+0200)
Subject: mm,page_owner: don't remove __GFP_NOLOCKDEP in add_stack_record_to_list
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=77ddd726f90c15770c48e77979c0b5d55b032e60;p=linux.git

mm,page_owner: don't remove __GFP_NOLOCKDEP in add_stack_record_to_list

Otherwise we'll generate false lockdep positives.

Link: https://lkml.kernel.org/r/20240429082828.1615986-1-hch@lst.de
Fixes: 217b2119b9e2 ("mm,page_owner: implement the tracking of the stacks count")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Oscar Salvador <osalvador@suse.de>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Darrick J. Wong <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Marco Elver <elver@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/page_owner.c b/mm/page_owner.c
index 6669c7eadfb36..8eed0f3dc0853 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -170,7 +170,7 @@ static void add_stack_record_to_list(struct stack_record *stack_record,
 
 	/* Filter gfp_mask the same way stackdepot does, for consistency */
 	gfp_mask &= ~GFP_ZONEMASK;
-	gfp_mask &= (GFP_ATOMIC | GFP_KERNEL);
+	gfp_mask &= (GFP_ATOMIC | GFP_KERNEL | __GFP_NOLOCKDEP);
 	gfp_mask |= __GFP_NOWARN;
 
 	set_current_in_page_owner();