linux-kernel - [PATCH 2/2] mm/memory_failure: constify static mm_walk

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Date:   Thu, 14 Oct 2021 09:50:42 +0200
From:   Rikard Falkeborn <rikard.falkeborn@...il.com>
To:     SeongJae Park <sj@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Naoya Horiguchi <naoya.horiguchi@....com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Rikard Falkeborn <rikard.falkeborn@...il.com>
Subject: [PATCH 2/2] mm/memory_failure: constify static mm_walk_ops

The only usage of hwp_walk_ops is to pass its address to
walk_page_range() which takes a pointer to const mm_walk_ops as
argument. Make it const to allow the compiler to put it in read-only
memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@...il.com>
---
 mm/memory-failure.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 92eeb317adf4..8d5faf347ed1 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -674,7 +674,7 @@ static int hwpoison_hugetlb_range(pte_t *ptep, unsigned long hmask,
 #define hwpoison_hugetlb_range	NULL
 #endif
 
-static struct mm_walk_ops hwp_walk_ops = {
+static const struct mm_walk_ops hwp_walk_ops = {
 	.pmd_entry = hwpoison_pte_range,
 	.hugetlb_entry = hwpoison_hugetlb_range,
 };
-- 
2.33.0