dm cache policy smq: move 'dm-cache-default' module alias to SMQ

When creating dm-cache with the default policy, it will call
request_module("dm-cache-default") to register the default policy.
But the "dm-cache-default" alias was left referring to the MQ policy.
Fix this by moving the module alias to SMQ.

Fixes: bccab6a0 (dm cache: switch the "default" cache replacement policy from mq to smq)
Signed-off-by: Yi Zhang <>
Signed-off-by: Mike Snitzer <>
diff --git a/drivers/md/dm-cache-policy-mq.c b/drivers/md/dm-cache-policy-mq.c
index 3281437..aa1b41c 100644
--- a/drivers/md/dm-cache-policy-mq.c
+++ b/drivers/md/dm-cache-policy-mq.c
@@ -1471,5 +1471,3 @@
 MODULE_AUTHOR("Joe Thornber <>");
 MODULE_DESCRIPTION("mq cache policy");
diff --git a/drivers/md/dm-cache-policy-smq.c b/drivers/md/dm-cache-policy-smq.c
index 48a4a82..200366c 100644
--- a/drivers/md/dm-cache-policy-smq.c
+++ b/drivers/md/dm-cache-policy-smq.c
@@ -1789,3 +1789,5 @@
 MODULE_AUTHOR("Joe Thornber <>");
 MODULE_DESCRIPTION("smq cache policy");