From b2b95a58b4326c8a8aa87fdf6e8b0f6421dbaf99 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sun, 7 Aug 2011 04:50:02 -0400
Subject: add fast path for normal mutexes back to pthread_mutex_lock

---
 src/thread/pthread_mutex_lock.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/thread/pthread_mutex_lock.c b/src/thread/pthread_mutex_lock.c
index 2b4f3a73..42b5af64 100644
--- a/src/thread/pthread_mutex_lock.c
+++ b/src/thread/pthread_mutex_lock.c
@@ -2,5 +2,8 @@
 
 int pthread_mutex_lock(pthread_mutex_t *m)
 {
+	if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_cas(&m->_m_lock, 0, EBUSY))
+		return 0;
+
 	return pthread_mutex_timedlock(m, 0);
 }
-- 
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