[PATCH] sunrpc: add missing spin_unlock

auth_domain_put() forgot to unlock acquired spinlock.

Cc: Olaf Kirch <okir@monad.swb.de>
Cc: Andy Adamson <andros@citi.umich.edu>
Cc: J. Bruce Fields <bfields@citi.umich.edu>
Acked-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Cc: Neil Brown <neilb@suse.de>
Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

net/sunrpc/svcauth.c

@@ -126,6 +126,7 @@ void auth_domain_put(struct auth_domain *dom)
 	if (atomic_dec_and_lock(&dom->ref.refcount, &auth_domain_lock)) {
 		hlist_del(&dom->hash);
 		dom->flavour->domain_release(dom);
+		spin_unlock(&auth_domain_lock);
 	}
 }