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update first_free correctly.

This commit is contained in:
yamt 2006-05-14 08:20:35 +00:00
parent bd02d883c4
commit be55e1f38a
1 changed files with 5 additions and 4 deletions
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9
sys/uvm/uvm_map.c
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@ -1,4 +1,4 @@
/* $NetBSD: uvm_map.c,v 1.219 2006/05/03 14:12:01 yamt Exp $ */
/* $NetBSD: uvm_map.c,v 1.220 2006/05/14 08:20:35 yamt Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@ -71,7 +71,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.219 2006/05/03 14:12:01 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: uvm_map.c,v 1.220 2006/05/14 08:20:35 yamt Exp $");
#include "opt_ddb.h"
#include "opt_uvmhist.h"
@ -1898,7 +1898,7 @@ uvm_unmap_remove(struct vm_map *map, vaddr_t start, vaddr_t end,
* Save the free space hint
*/
if (map->first_free->start >= start)
if (map->first_free != &map->header && map->first_free->start >= start)
map->first_free = entry->prev;
/*
@ -2539,7 +2539,8 @@ uvm_map_extract(struct vm_map *srcmap, vaddr_t start, vsize_t len,
/* purge possible stale hints from srcmap */
if (flags & UVM_EXTRACT_REMOVE) {
SAVE_HINT(srcmap, srcmap->hint, orig_entry->prev);
if (srcmap->first_free->start >= start)
if (srcmap->first_free != &srcmap->header &&
srcmap->first_free->start >= start)
srcmap->first_free = orig_entry->prev;
}