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Reset l_mutex when waking up a thread. select uses it to determine 

if a thread is still selecting, and would get a KASSERT panic if
the thread had been woken up but not run yet when selnotify() was
called.
This commit is contained in:
pooka 2010-07-22 21:00:07 +00:00
parent 591b4ec0ca
commit f3c8997bfe
1 changed files with 4 additions and 2 deletions
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6
sys/rump/librump/rumpkern/sleepq.c
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@ -1,4 +1,4 @@
/* $NetBSD: sleepq.c,v 1.6 2009/11/17 15:23:42 pooka Exp $ */
/* $NetBSD: sleepq.c,v 1.7 2010/07/22 21:00:07 pooka Exp $ */
/*
* Copyright (c) 2008 Antti Kantee. All Rights Reserved.
@ -26,7 +26,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sleepq.c,v 1.6 2009/11/17 15:23:42 pooka Exp $");
__KERNEL_RCSID(0, "$NetBSD: sleepq.c,v 1.7 2010/07/22 21:00:07 pooka Exp $");
#include <sys/param.h>
#include <sys/condvar.h>
@ -112,6 +112,7 @@ sleepq_wake(sleepq_t *sq, wchan_t wchan, u_int expected, kmutex_t *mp)
if (l->l_wchan == wchan) {
found = true;
l->l_wchan = NULL;
l->l_mutex = NULL;
TAILQ_REMOVE(sq, l, l_sleepchain);
}
}
@ -127,6 +128,7 @@ sleepq_unsleep(struct lwp *l, bool cleanup)
{
l->l_wchan = NULL;
l->l_mutex = NULL;
TAILQ_REMOVE(l->l_sleepq, l, l_sleepchain);
cv_broadcast(&sq_cv);