Fix rpc shutdown event condition bug

We want to wait for the cl_users to go down to zero, not for it to stay
positive.  Quoth Trond (who wasn't even the author, but acked the wrong
version): "Argh! I need to increase my daily caffeine dosages."

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index a44da8b..4cef7fa 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -269,7 +269,7 @@
 		clnt->cl_dead = 0;
 		rpc_killall_tasks(clnt);
 		wait_event_timeout(destroy_wait,
-			atomic_read(&clnt->cl_users) > 0, 1*HZ);
+			!atomic_read(&clnt->cl_users), 1*HZ);
 	}
 
 	if (atomic_read(&clnt->cl_users) < 0) {