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__pmap_kpte_lookup: verify that ptp is not NULL.

This commit is contained in:
uwe 2006-10-24 01:56:33 +00:00
parent 4f1cd3b286
commit 07dcd59f52
1 changed files with 8 additions and 5 deletions
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13
sys/arch/sh3/sh3/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.56 2006/09/24 00:43:44 tsutsui Exp $ */
/* $NetBSD: pmap.c,v 1.57 2006/10/24 01:56:33 uwe Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.56 2006/09/24 00:43:44 tsutsui Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.57 2006/10/24 01:56:33 uwe Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -972,10 +972,13 @@ __pmap_pte_lookup(pmap_t pmap, vaddr_t va)
pt_entry_t *
__pmap_kpte_lookup(vaddr_t va)
{
pt_entry_t *ptp;
return (__pmap_kernel.pm_ptp
[__PMAP_PTP_INDEX(va - VM_MIN_KERNEL_ADDRESS)] +
__PMAP_PTP_OFSET(va));
ptp = __pmap_kernel.pm_ptp[__PMAP_PTP_INDEX(va-VM_MIN_KERNEL_ADDRESS)];
if (ptp == NULL)
return NULL;
return (ptp + __PMAP_PTP_OFSET(va));
}
/*