[PATCH] dm space map metadata: constify dm_space_map structures

From: Bhumika Goyal
Date: Wed Feb 15 2017 - 13:13:51 EST


Declare dm_space_map structures as const as they are only passed as an
argument to the function memcpy. This argument is of type const void *,
so dm_space_map structures having this property can be declared as
const.

File size before:
text data bss dec hex filename
4889 240 0 5129 1409 dm-space-map-metadata.o

File size after:
text data bss dec hex filename
5139 0 0 5139 1413 dm-space-map-metadata.o

Signed-off-by: Bhumika Goyal <bhumirks@xxxxxxxxx>
---
drivers/md/persistent-data/dm-space-map-metadata.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/persistent-data/dm-space-map-metadata.c b/drivers/md/persistent-data/dm-space-map-metadata.c
index 20557e2..4aed69d 100644
--- a/drivers/md/persistent-data/dm-space-map-metadata.c
+++ b/drivers/md/persistent-data/dm-space-map-metadata.c
@@ -544,7 +544,7 @@ static int sm_metadata_copy_root(struct dm_space_map *sm, void *where_le, size_t

static int sm_metadata_extend(struct dm_space_map *sm, dm_block_t extra_blocks);

-static struct dm_space_map ops = {
+static const struct dm_space_map ops = {
.destroy = sm_metadata_destroy,
.extend = sm_metadata_extend,
.get_nr_blocks = sm_metadata_get_nr_blocks,
@@ -671,7 +671,7 @@ static int sm_bootstrap_copy_root(struct dm_space_map *sm, void *where,
return -EINVAL;
}

-static struct dm_space_map bootstrap_ops = {
+static const struct dm_space_map bootstrap_ops = {
.destroy = sm_bootstrap_destroy,
.extend = sm_bootstrap_extend,
.get_nr_blocks = sm_bootstrap_get_nr_blocks,
--
1.9.1