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sigswitch(): don't blat the kernel_lock count that sleepq_block() saved 

earlier.
This commit is contained in:
ad 2007-02-16 00:35:20 +00:00
parent 9212590495
commit 2b011d2fa7
1 changed files with 7 additions and 4 deletions
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11
sys/kern/kern_sig.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_sig.c,v 1.244 2007/02/15 15:10:44 yamt Exp $ */
/* $NetBSD: kern_sig.c,v 1.245 2007/02/16 00:35:20 ad Exp $ */
/*-
* Copyright (c) 2006, 2007 The NetBSD Foundation, Inc.
@ -73,7 +73,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.244 2007/02/15 15:10:44 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_sig.c,v 1.245 2007/02/16 00:35:20 ad Exp $");
#include "opt_ktrace.h"
#include "opt_ptrace.h"
@ -1453,6 +1453,9 @@ sigswitch(boolean_t ppsig, int ppmask, int signo)
{
struct lwp *l = curlwp, *l2;
struct proc *p = l->l_proc;
#ifdef MULTIPROCESSOR
int biglocks;
#endif
LOCK_ASSERT(mutex_owned(&p->p_smutex));
@ -1525,7 +1528,7 @@ sigswitch(boolean_t ppsig, int ppmask, int signo)
/*
* Unlock and switch away.
*/
KERNEL_UNLOCK_ALL(l, &l->l_biglocks);
KERNEL_UNLOCK_ALL(l, &biglocks);
if (p->p_stat == SSTOP || (p->p_sflag & PS_STOPPING) != 0) {
p->p_nrlwps--;
lwp_lock(l);
@ -1537,7 +1540,7 @@ sigswitch(boolean_t ppsig, int ppmask, int signo)
mutex_exit(&p->p_smutex);
lwp_lock(l);
mi_switch(l, NULL);
KERNEL_LOCK(l->l_biglocks, l);
KERNEL_LOCK(biglocks, l);
mutex_enter(&p->p_smutex);
}