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_simple_lock(): revert to IPL at entry while spinning on the lock; raise 

to spllock() again after we get it.
This commit is contained in:
pk 2003-01-19 14:40:55 +00:00
parent e29b769cd8
commit 7f03dc8c13
1 changed files with 4 additions and 2 deletions
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6
sys/kern/kern_lock.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_lock.c,v 1.69 2003/01/18 10:06:27 thorpej Exp $ */
/* $NetBSD: kern_lock.c,v 1.70 2003/01/19 14:40:55 pk Exp $ */
/*-
* Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
@ -80,7 +80,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_lock.c,v 1.69 2003/01/18 10:06:27 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_lock.c,v 1.70 2003/01/19 14:40:55 pk Exp $");
#include "opt_multiprocessor.h"
#include "opt_lockdebug.h"
@ -1060,7 +1060,9 @@ _simple_lock(__volatile struct simplelock *alp, const char *id, int l)
#if defined(MULTIPROCESSOR) /* { */
/* Acquire the lock before modifying any fields. */
splx(s);
__cpu_simple_lock(&alp->lock_data);
s = spllock();
#else
alp->lock_data = __SIMPLELOCK_LOCKED;
#endif /* } */