Author: davidxu
Date: Fri Dec 24 07:41:39 2010
New Revision: 216687
URL: http://svn.freebsd.org/changeset/base/216687
Log:
Always clear flag PMUTEX_FLAG_DEFERED when unlocking, as it is only
significant for lock owner.
Modified:
head/lib/libthr/thread/thr_mutex.c
Modified: head/lib/libthr/thread/thr_mutex.c
==============================================================================
--- head/lib/libthr/thread/thr_mutex.c Fri Dec 24 06:41:29 2010
(r216686)
+++ head/lib/libthr/thread/thr_mutex.c Fri Dec 24 07:41:39 2010
(r216687)
@@ -653,7 +653,7 @@ mutex_unlock_common(struct pthread_mutex
m->m_count > 0)) {
m->m_count--;
} else {
- if (curthread->will_sleep == 0 && (m->m_flags &
PMUTEX_FLAG_DEFERED) != 0) {
+ if ((m->m_flags & PMUTEX_FLAG_DEFERED) != 0) {
defered = 1;
m->m_flags &= ~PMUTEX_FLAG_DEFERED;
} else
@@ -662,7 +662,7 @@ mutex_unlock_common(struct pthread_mutex
DEQUEUE_MUTEX(curthread, m);
_thr_umutex_unlock(&m->m_lock, id);
- if (defered) {
+ if (curthread->will_sleep == 0 && defered) {
_thr_wake_all(curthread->defer_waiters,
curthread->nwaiter_defer);
curthread->nwaiter_defer = 0;
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