From: Chenghao Duan <duanchenghao@kylinos.cn>
Date: Thu, 26 Mar 2026 08:47:23 +0000 (+0800)
Subject: mm/memfd_luo: remove unnecessary memset in zero-size memfd path
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=4aa6424f37b58a4f8298329166657bd4fd8e9ca8;p=thirdparty%2Fkernel%2Flinux.git

mm/memfd_luo: remove unnecessary memset in zero-size memfd path

The memset(kho_vmalloc, 0, sizeof(*kho_vmalloc)) call in the zero-size
file handling path is unnecessary because the allocation of the ser
structure already uses the __GFP_ZERO flag, ensuring the memory is already
zero-initialized.

Link: https://lore.kernel.org/20260326084727.118437-4-duanchenghao@kylinos.cn
Signed-off-by: Chenghao Duan <duanchenghao@kylinos.cn>
Reviewed-by: Pratyush Yadav <pratyush@kernel.org>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Haoran Jiang <jianghaoran@kylinos.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/memfd_luo.c b/mm/memfd_luo.c
index 865b044bee62..5a8ead5be087 100644
--- a/mm/memfd_luo.c
+++ b/mm/memfd_luo.c
@@ -105,7 +105,6 @@ static int memfd_luo_preserve_folios(struct file *file,
 	if (!size) {
 		*nr_foliosp = 0;
 		*out_folios_ser = NULL;
-		memset(kho_vmalloc, 0, sizeof(*kho_vmalloc));
 		return 0;
 	}