crash_dump: 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, as an example: Before: ====== text data bss dec hex filename 16339 11001 384 27724 6c4c kernel/crash_dump_dm_crypt.o After: ===== text data bss dec hex filename 16499 10841 384 27724 6c4c kernel/crash_dump_dm_crypt.o

Christophe JAILLET committed 11 months ago

Commit b11052b1 parent 03192271 file · +2 −2Browse files

Showing the changes to kernel/crash_dump_dm_crypt.c (1 of 1 file). Show all

Unified · Split

kernel/crash_dump_dm_crypt.c+2−2

@@ -223,7 +223,7 @@ static void config_key_release(struct config_item *item) · 222 unmodified lines
223	key_count--;	223	key_count--;
224	}	224	}
225		225
226	static struct configfs_item_operations config_key_item_ops = {	226	static const struct configfs_item_operations config_key_item_ops = {
227	.release = config_key_release,	227	.release = config_key_release,
228	};	228	};
229		229
@@ -298,7 +298,7 @@ static struct configfs_attribute *config_keys_attrs[] = { · 68 unmodified lines
298	* Note that, since no extra work is required on ->drop_item(),	298	* Note that, since no extra work is required on ->drop_item(),
299	* no ->drop_item() is provided.	299	* no ->drop_item() is provided.
300	*/	300	*/
301	static struct configfs_group_operations config_keys_group_ops = {	301	static const struct configfs_group_operations config_keys_group_ops = {
302	.make_item = config_keys_make_item,	302	.make_item = config_keys_make_item,
303	};	303	};
304		304