[PATCH] sunrpc: add missing spin_unlock

auth_domain_put() forgot to unlock acquired spinlock.

Cc: Olaf Kirch <[e-mail]>
Cc: Andy Adamson <[e-mail]>
Cc: J. Bruce Fields <[e-mail]>
Acked-by: Trond Myklebust <[e-mail]>
Signed-off-by: Akinobu Mita <[e-mail]>
Cc: Neil Brown <[e-mail]>
Acked-by: Peter Zijlstra <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

net/sunrpc/svcauth.c

···
 	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);
 	}
 }