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Use a barrier in spl/splx.

This commit is contained in:
fvdl 2002-11-23 13:44:41 +00:00
parent c903de3a0a
commit 9d672e72f5
1 changed files with 5 additions and 1 deletions
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6
sys/arch/x86_64/include/intr.h
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@ -1,4 +1,4 @@
/* $NetBSD: intr.h,v 1.2 2002/11/23 12:53:51 fvdl Exp $ */
/* $NetBSD: intr.h,v 1.3 2002/11/23 13:44:41 fvdl Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -87,6 +87,8 @@ static __inline int splraise __P((int));
static __inline void spllower __P((int));
static __inline void softintr __P((int));
#define __splbarrier() __asm __volatile("":::"memory")
/*
* Add a mask to cpl, and return the old value of cpl.
*/
@ -97,6 +99,7 @@ splraise(ncpl)
register int ocpl = cpl;
cpl = ocpl | ncpl;
__splbarrier();
return (ocpl);
}
@ -109,6 +112,7 @@ spllower(ncpl)
register int ncpl;
{
__splbarrier();
cpl = ncpl;
if (ipending & ~ncpl)
Xspllower();