Commit 9e371032 authored Dec 29, 2025 by Christophe JAILLET Committed by Jens Axboe Dec 29, 2025

null_blk: Constify struct configfs_item_operations and configfs_group_operations



'struct configfs_item_operations' and 'configfs_group_operations' are not
modified in this driver.

Constifying these structures moves some data to a read-only section, so
increases overall security, especially when the structure holds some
function pointers.

On a x86_64, with allmodconfig:
Before:
======
   text	   data	    bss	    dec	    hex	filename
 100263	  37808	   2752	 140823	  22617	drivers/block/null_blk/main.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
 100423	  37648	   2752	 140823	  22617	drivers/block/null_blk/main.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent e1418af7

drivers/block/null_blk/main.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -642,7 +642,7 @@ static void nullb_device_release(struct config_item *item)
		null_free_dev(dev);
		}

		static struct configfs_item_operations nullb_device_ops = {
		static const struct configfs_item_operations nullb_device_ops = {
		.release = nullb_device_release,
		};

		@@ -739,7 +739,7 @@ static struct configfs_attribute *nullb_group_attrs[] = {
		NULL,
		};

		static struct configfs_group_operations nullb_group_ops = {
		static const struct configfs_group_operations nullb_group_ops = {
		.make_group = nullb_group_make_group,
		.drop_item = nullb_group_drop_item,
		};