dm: add helper macro for simple DM target module init and exit

Eliminate duplicate boilerplate code for simple modules that contain
a single DM target driver without any additional setup code.

Add a new module_dm() macro, which replaces the module_init() and
module_exit() with template functions that call dm_register_target()
and dm_unregister_target() respectively.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>

1 files changed, 2 insertions, 14 deletions

diff --git a/drivers/md/dm-zoned-target.c b/drivers/md/dm-zoned-target.c
index ad4764dcd013..ad8e670a2f9b 100644
--- a/drivers/md/dm-zoned-target.c
+++ b/drivers/md/dm-zoned-target.c
@@ -1138,7 +1138,7 @@ static int dmz_message(struct dm_target *ti, unsigned int argc, char **argv,
 	return r;
 }
 
-static struct target_type dmz_type = {
+static struct target_type zoned_target = {
 	.name		 = "zoned",
 	.version	 = {2, 0, 0},
 	.features	 = DM_TARGET_SINGLETON | DM_TARGET_MIXED_ZONED_MODEL,
@@ -1154,19 +1154,7 @@ static struct target_type dmz_type = {
 	.status		 = dmz_status,
 	.message	 = dmz_message,
 };
-
-static int __init dmz_init(void)
-{
-	return dm_register_target(&dmz_type);
-}
-
-static void __exit dmz_exit(void)
-{
-	dm_unregister_target(&dmz_type);
-}
-
-module_init(dmz_init);
-module_exit(dmz_exit);
+module_dm(zoned);
 
 MODULE_DESCRIPTION(DM_NAME " target for zoned block devices");
 MODULE_AUTHOR("Damien Le Moal <damien.lemoal@wdc.com>");