[PATCH] nullb: make config_item_type const

[Bhumika Goyal <bhumirks@gmail.com>]

This is a followup patch for: https://lkml.org/lkml/2017/10/11/375 and
https://patchwork.kernel.org/patch/9999649/

Make these structures const as they are either passed to the functions
having the argument as const or stored as a reference in the "ci_type"
const field of a config_item structure.

Done using Coccienlle.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
---
 drivers/block/null_blk.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c
index bf2c8ca..46b6008 100644
--- a/drivers/block/null_blk.c
+++ b/drivers/block/null_blk.c
@@ -480,7 +480,7 @@ static void nullb_device_release(struct config_item *item)
 	.release	= nullb_device_release,
 };
 
-static struct config_item_type nullb_device_type = {
+static const struct config_item_type nullb_device_type = {
 	.ct_item_ops	= &nullb_device_ops,
 	.ct_attrs	= nullb_device_attrs,
 	.ct_owner	= THIS_MODULE,
@@ -532,7 +532,7 @@ static ssize_t memb_group_features_show(struct config_item *item, char *page)
 	.drop_item	= nullb_group_drop_item,
 };
 
-static struct config_item_type nullb_group_type = {
+static const struct config_item_type nullb_group_type = {
 	.ct_group_ops	= &nullb_group_ops,
 	.ct_attrs	= nullb_group_attrs,
 	.ct_owner	= THIS_MODULE,
-- 
1.9.1