dlm: add __init and __exit marks to init and exit functions

it moves 365 bytes from .text to .init.text, and 30 bytes from .text to
.exit.text, saves memory.

Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: David Teigland <teigland@redhat.com>
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index 70b31b9..ebbcf38 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -902,7 +902,7 @@
 	.minor = MISC_DYNAMIC_MINOR,
 };
 
-int dlm_user_init(void)
+int __init dlm_user_init(void)
 {
 	int error;