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authorad <ad@NetBSD.org>2020-01-25 18:30:41 +0000
committerad <ad@NetBSD.org>2020-01-25 18:30:41 +0000
commit788998405bca062ceec92f76e6a097f22f3fb4e7 (patch)
treeea876ba53d884a897065bacbb11041b145989f6d /lib/libpthread
parent0939ef02eb8be23df1a7e127e2da5a459c7d9b0b (diff)
Adjustment to previous: don't call _lwp_unpark_all() with nwaiters == 0.
Diffstat (limited to 'lib/libpthread')
-rw-r--r--lib/libpthread/pthread_mutex.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/libpthread/pthread_mutex.c b/lib/libpthread/pthread_mutex.c
index 538d9f9a84f..45a9f9cb7aa 100644
--- a/lib/libpthread/pthread_mutex.c
+++ b/lib/libpthread/pthread_mutex.c
@@ -1,4 +1,4 @@
-/* $NetBSD: pthread_mutex.c,v 1.67 2020/01/25 17:58:28 ad Exp $ */
+/* $NetBSD: pthread_mutex.c,v 1.68 2020/01/25 18:30:41 ad Exp $ */
/*-
* Copyright (c) 2001, 2003, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@@ -47,7 +47,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: pthread_mutex.c,v 1.67 2020/01/25 17:58:28 ad Exp $");
+__RCSID("$NetBSD: pthread_mutex.c,v 1.68 2020/01/25 18:30:41 ad Exp $");
#include <sys/types.h>
#include <sys/lwpctl.h>
@@ -529,7 +529,7 @@ pthread__mutex_unlock_slow(pthread_mutex_t *ptm)
(void)_lwp_unpark(self->pt_waiters[0],
__UNVOLATILE(&ptm->ptm_waiters));
}
- } else {
+ } else if (self->pt_nwaiters > 0) {
(void)_lwp_unpark_all(self->pt_waiters, self->pt_nwaiters,
__UNVOLATILE(&ptm->ptm_waiters));
}