[patch 122/262] mm/memory_failure: constify static mm_walk_ops

Andrew Morton
2021-11-05T20:41:04Z

From: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Subject: 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.

Link: https://lkml.kernel.org/r/20211014075042.17174-3-rikard.falkeborn@gmail.com
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

mm/memory-failure.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/memory-failure.c~mm-memory_failure-constify-static-mm_walk_ops
+++ a/mm/memory-failure.c
@@ -674,7 +674,7 @@ static int hwpoison_hugetlb_range(pte_t
#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,
};
_