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honor the PG_RDONLY flag (so that NFS can clear the PG_NEEDCOMMIT flag 

when page with it set is modified again).  fixes PR 15733.
This commit is contained in:
chs 2002-02-27 16:02:03 +00:00
parent c17ada6ca5
commit 2cce3ebcba
1 changed files with 4 additions and 3 deletions
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7
sys/uvm/uvm_bio.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_bio.c,v 1.24 2002/02/15 17:45:05 simonb Exp $ */
/* $NetBSD: uvm_bio.c,v 1.25 2002/02/27 16:02:03 chs Exp $ */
/*
* Copyright (c) 1998 Chuck Silvers.
@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_bio.c,v 1.24 2002/02/15 17:45:05 simonb Exp $");
__KERNEL_RCSID(0, "$NetBSD: uvm_bio.c,v 1.25 2002/02/27 16:02:03 chs Exp $");
#include "opt_uvmhist.h"
@ -323,7 +323,8 @@ again:
KASSERT(access_type == VM_PROT_READ ||
(pg->flags & PG_RDONLY) == 0);
pmap_enter(ufi->orig_map->pmap, va, VM_PAGE_TO_PHYS(pg),
prot, access_type);
(pg->flags & PG_RDONLY) ? prot & ~VM_PROT_WRITE : prot,
access_type);
uvm_pageactivate(pg);
pg->flags &= ~(PG_BUSY);
UVM_PAGE_OWN(pg, NULL);