* [PATCH] mm/mm_init: remove redundant memset in free_area_init()
@ 2026-07-20 15:09 Sang-Heon Jeon
2026-07-22 8:24 ` Mike Rapoport
0 siblings, 1 reply; 2+ messages in thread
From: Sang-Heon Jeon @ 2026-07-20 15:09 UTC (permalink / raw)
To: Mike Rapoport, Andrew Morton; +Cc: Sang-Heon Jeon, linux-kernel, linux-mm
zone_movable_pfn is zero-initialized and only set by
find_zone_movable_pfns_for_nodes(), which runs once during boot right
after the memset, so the memset has no effect.
Remove redundant memset. No functional change.
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
---
mm/mm_init.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/mm/mm_init.c b/mm/mm_init.c
index 711f821f7b3c..144bb4042942 100644
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -1844,7 +1844,6 @@ static void __init free_area_init(void)
}
/* Find the PFNs that ZONE_MOVABLE begins at in each node */
- memset(zone_movable_pfn, 0, sizeof(zone_movable_pfn));
find_zone_movable_pfns_for_nodes();
/* Print out the zone ranges */
--
2.43.0
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] mm/mm_init: remove redundant memset in free_area_init()
2026-07-20 15:09 [PATCH] mm/mm_init: remove redundant memset in free_area_init() Sang-Heon Jeon
@ 2026-07-22 8:24 ` Mike Rapoport
0 siblings, 0 replies; 2+ messages in thread
From: Mike Rapoport @ 2026-07-22 8:24 UTC (permalink / raw)
To: Andrew Morton, Sang-Heon Jeon; +Cc: linux-kernel, linux-mm
On Tue, 21 Jul 2026 00:09:13 +0900, Sang-Heon Jeon wrote:
> mm/mm_init: remove redundant memset in free_area_init()
Applied to misc branch of memblock.git tree, thanks!
[1/1] mm/mm_init: remove redundant memset in free_area_init()
commit: d7bfd98ba01d2af48cc238d5525201c83fdef251
tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
branch: misc
--
Sincerely yours,
Mike.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-07-20 15:09 [PATCH] mm/mm_init: remove redundant memset in free_area_init() Sang-Heon Jeon
2026-07-22 8:24 ` Mike Rapoport
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