[patch 237/262] mm/damon/vaddr: constify static mm_walk_ops

Andrew Morton
2021-11-05T20:47:09Z

From: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Subject: mm/damon/vaddr: constify static mm_walk_ops

The only usage of these structs is to pass their addresses to
walk_page_range(), which takes a pointer to const mm_walk_ops as argument.
Make them const to allow the compiler to put them in read-only memory.

Link: https://lkml.kernel.org/r/20211014075042.17174-2-rikard.falkeborn@gmail.com
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

mm/damon/vaddr.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/damon/vaddr.c~mm-damon-vaddr-constify-static-mm_walk_ops
+++ a/mm/damon/vaddr.c
@@ -394,7 +394,7 @@ out:
return 0;
}

-static struct mm_walk_ops damon_mkold_ops = {
+static const struct mm_walk_ops damon_mkold_ops = {
.pmd_entry = damon_mkold_pmd_entry,
};

@@ -490,7 +490,7 @@ out:
return 0;
}

-static struct mm_walk_ops damon_young_ops = {
+static const struct mm_walk_ops damon_young_ops = {
.pmd_entry = damon_young_pmd_entry,
};

_