From a8a343d2e609ed41b59e73f668830a79108107ff Mon Sep 17 00:00:00 2001
From: David Xu <davidxu@FreeBSD.org>
Date: Tue, 5 Dec 2006 23:46:11 +0000
Subject: [PATCH] _thr_ucond_wait drops lock, we should pick it up again.

---
 lib/libthr/thread/thr_barrier.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/libthr/thread/thr_barrier.c b/lib/libthr/thread/thr_barrier.c
index cafba69dbc25..bbd444708dee 100644
--- a/lib/libthr/thread/thr_barrier.c
+++ b/lib/libthr/thread/thr_barrier.c
@@ -103,6 +103,7 @@ _pthread_barrier_wait(pthread_barrier_t *barrier)
 		cycle = bar->b_cycle;
 		do {
 			_thr_ucond_wait(&bar->b_cv, &bar->b_lock, NULL, 0);
+			THR_UMUTEX_LOCK(curthread, &bar->b_lock);
 			/* test cycle to avoid bogus wakeup */
 		} while (cycle == bar->b_cycle);
 		THR_UMUTEX_UNLOCK(curthread, &bar->b_lock);