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lwp_exit2: grab kernel_lock to preserve locking order.

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yamt 2004-02-09 13:02:48 +00:00
parent ba30c144ea
commit fa47baddee
1 changed files with 5 additions and 2 deletions
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7
sys/kern/kern_lwp.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_lwp.c,v 1.21 2004/02/06 08:08:46 junyoung Exp $ */ /* $NetBSD: kern_lwp.c,v 1.22 2004/02/09 13:02:48 yamt Exp $ */
/*- /*-
* Copyright (c) 2001 The NetBSD Foundation, Inc. * Copyright (c) 2001 The NetBSD Foundation, Inc.
@ -37,7 +37,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_lwp.c,v 1.21 2004/02/06 08:08:46 junyoung Exp $"); __KERNEL_RCSID(0, "$NetBSD: kern_lwp.c,v 1.22 2004/02/09 13:02:48 yamt Exp $");
#include "opt_multiprocessor.h" #include "opt_multiprocessor.h"
@ -588,6 +588,7 @@ lwp_exit2(struct lwp *l)
{ {
struct proc *p; struct proc *p;
KERNEL_LOCK(LK_EXCLUSIVE);
/* /*
* Free the VM resources we're still holding on to. * Free the VM resources we're still holding on to.
*/ */
@ -604,9 +605,11 @@ lwp_exit2(struct lwp *l)
} }
pool_put(&lwp_pool, l); pool_put(&lwp_pool, l);
KERNEL_UNLOCK();
} else { } else {
p = l->l_proc; p = l->l_proc;
p->p_nzlwps++; p->p_nzlwps++;
KERNEL_UNLOCK();
wakeup(&p->p_nlwps); wakeup(&p->p_nlwps);
} }
} }