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Fix a bug with pmap_remove_all and pmap_deactivate. Should prevent any

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pmap_activate from allocating an ASID while doing pmap_remove_all XXX.
This commit is contained in:
matt 2011-04-06 05:35:37 +00:00
parent 4bb672436e
commit 0d18afd259
1 changed files with 6 additions and 4 deletions
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10
sys/arch/mips/mips/pmap_tlb.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap_tlb.c,v 1.3 2011/03/15 07:32:53 matt Exp $ */
/* $NetBSD: pmap_tlb.c,v 1.4 2011/04/06 05:35:37 matt Exp $ */
/*-
* Copyright (c) 2010 The NetBSD Foundation, Inc.
@ -31,7 +31,7 @@
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap_tlb.c,v 1.3 2011/03/15 07:32:53 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap_tlb.c,v 1.4 2011/04/06 05:35:37 matt Exp $");
/*
* Manages address spaces in a TLB.
@ -806,9 +806,11 @@ pmap_tlb_asid_deactivate(pmap_t pm)
#ifdef MULTIPROCESSOR
/*
* The kernel pmap is aways onproc and active and must never have
* those bits cleared.
* those bits cleared. If pmap_remove_all was called, it has already
* deactivated the pmap and thusly onproc will be 0 so there's nothing
* to do.
*/
if (pm != pmap_kernel()) {
if (pm != pmap_kernel() && pm->pm_onproc != 0) {
struct cpu_info * const ci = curcpu();
struct pmap_tlb_info * const ti = ci->ci_tlb_info;
const uint32_t cpu_mask = 1 << cpu_index(ci);