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/lockspace.c b/fs/dlm/lockspace.c
index b180fdc..b64e55e 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -191,7 +191,7 @@
 }
 
 
-int dlm_lockspace_init(void)
+int __init dlm_lockspace_init(void)
 {
 	ls_count = 0;
 	mutex_init(&ls_lock);