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Only take the kernel lock if we interrupted while < IPL_SCHED. Handlers 

at higher levels must therefore provide their own locking. Currently
this is only serial interrupts (com), which has COM_MPLOCK for this
purpose.
This commit is contained in:
fvdl 2002-11-27 00:43:12 +00:00
parent 18ad7e80b6
commit 39652b6d2a
1 changed files with 7 additions and 5 deletions
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12
sys/arch/i386/i386/intr.c
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@ -1,4 +1,4 @@
/* $NetBSD: intr.c,v 1.3 2002/11/25 02:10:28 enami Exp $ */
/* $NetBSD: intr.c,v 1.4 2002/11/27 00:43:12 fvdl Exp $ */
/*
* Copyright 2002 (c) Wasabi Systems, Inc.
@ -626,15 +626,17 @@ cpu_intr_init(struct cpu_info *ci)
#ifdef MULTIPROCESSOR
void
i386_intlock(void)
i386_intlock(struct intrframe iframe)
{
spinlockmgr(&kernel_lock, LK_EXCLUSIVE|LK_CANRECURSE, 0);
if (iframe.if_ppl < IPL_SCHED)
spinlockmgr(&kernel_lock, LK_EXCLUSIVE|LK_CANRECURSE, 0);
}
void
i386_intunlock(void)
i386_intunlock(struct intrframe iframe)
{
spinlockmgr(&kernel_lock, LK_RELEASE, 0);
if (iframe.if_ppl < IPL_SCHED)
spinlockmgr(&kernel_lock, LK_RELEASE, 0);
}
#endif