From: Rich Felker <dalias@aerifal.cx>
Date: Fri, 25 Mar 2011 03:05:17 +0000 (-0400)
Subject: optimize spinlock spin
X-Git-Tag: v0.7.5~44
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=c322fe4e1a9bcc20f7a2ded1ac0e1674ea282bc0;p=oweals%2Fmusl.git

optimize spinlock spin
---

diff --git a/src/thread/pthread_spin_lock.c b/src/thread/pthread_spin_lock.c
index 59fa6ea8..9e43f475 100644
--- a/src/thread/pthread_spin_lock.c
+++ b/src/thread/pthread_spin_lock.c
@@ -2,6 +2,6 @@
 
 int pthread_spin_lock(pthread_spinlock_t *s)
 {
-	while (a_xchg(s, 1));
+	while (*s || a_xchg(s, 1));
 	return 0;
 }