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Wiring of a page were done at the wrong place, so pages in kernel space 

never got the wired bit set. This caused panics if a swapped out process
was swapped in again and the kernel stack had not yet been unmapped.
While here, add a forgotten lock initializer.
This commit is contained in:
ragge 2000-08-27 14:14:50 +00:00
parent 115bd3b350
commit fa53886b69
1 changed files with 4 additions and 3 deletions
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7
sys/arch/vax/vax/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.86 2000/08/08 19:06:52 ragge Exp $ */
/* $NetBSD: pmap.c,v 1.87 2000/08/27 14:14:50 ragge Exp $ */
/*
* Copyright (c) 1994, 1998, 1999 Ludd, University of Lule}, Sweden.
* All rights reserved.
@ -410,6 +410,7 @@ pmap_create()
MALLOC(pmap, struct pmap *, sizeof(*pmap), M_VMPMAP, M_WAITOK);
bzero(pmap, sizeof(struct pmap));
pmap_pinit(pmap);
simple_lock_init(&pmap->pm_lock);
return(pmap);
}
@ -702,8 +703,6 @@ if (startpmapdebug)
newpte = (p >> VAX_PGSHIFT) |
(prot & VM_PROT_WRITE ? PG_RW : PG_RO);
}
if (flags & PMAP_WIRED)
newpte |= PG_W;
/*
* Check if a pte page must be mapped in.
@ -742,6 +741,8 @@ if (startpmapdebug)
VM_PROT_READ|VM_PROT_WRITE);
}
}
if (flags & PMAP_WIRED)
newpte |= PG_W;
oldpte = patch[i] & ~(PG_V|PG_M);