[PATCH] mm/mm_init: remove redundant memset in free_area_init()

Sang-Heon Jeon posted 1 patch 4 days, 10 hours ago
mm/mm_init.c | 1 -
1 file changed, 1 deletion(-)
[PATCH] mm/mm_init: remove redundant memset in free_area_init()
Posted by Sang-Heon Jeon 4 days, 10 hours ago
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
Re: [PATCH] mm/mm_init: remove redundant memset in free_area_init()
Posted by Mike Rapoport 2 days, 17 hours ago
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.