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__cpu_simple_lock: loop without locking cache or asserting LOCK#.

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yamt 2004-10-23 21:25:22 +00:00
parent fa29ea9740
commit d82d2638a7
1 changed files with 6 additions and 3 deletions
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9
sys/arch/x86/include/lock.h
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@ -1,4 +1,4 @@
/* $NetBSD: lock.h,v 1.5 2003/10/27 13:43:48 junyoung Exp $ */
/* $NetBSD: lock.h,v 1.6 2004/10/23 21:25:22 yamt Exp $ */
/*-
* Copyright (c) 2000 The NetBSD Foundation, Inc.
@ -92,8 +92,11 @@ __cpu_simple_lock(__cpu_simple_lock_t *lockp)
{
while (x86_atomic_testset_i(lockp, __SIMPLELOCK_LOCKED)
!= __SIMPLELOCK_UNLOCKED)
x86_pause();
!= __SIMPLELOCK_UNLOCKED) {
do {
x86_pause();
} while (*lockp == __SIMPLELOCK_LOCKED);
}
__lockbarrier();
}