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Protect kmem_map modifications with splhigh() to work around a problem with

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the map being locked at interrupt time.
This commit is contained in:
dg 1994-12-15 22:47:11 +00:00
parent 606f723da6
commit 4f7dfd1229
1 changed files with 19 additions and 3 deletions
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22
sys/vm/vm_map.c
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@ -61,7 +61,7 @@
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*
* $Id: vm_map.c,v 1.5 1994/08/18 22:36:04 wollman Exp $
* $Id: vm_map.c,v 1.6 1994/10/09 01:52:10 phk Exp $
*/
/*
@ -752,19 +752,29 @@ vm_map_find(map, object, offset, addr, length, find_space)
boolean_t find_space;
{
register vm_offset_t start;
int result;
int result, s = 0;
start = *addr;
vm_map_lock(map);
if (map == kmem_map)
s = splhigh();
if (find_space) {
if (vm_map_findspace(map, start, length, addr)) {
vm_map_unlock(map);
if (map == kmem_map)
splx(s);
return (KERN_NO_SPACE);
}
start = *addr;
}
result = vm_map_insert(map, object, offset, start, start + length);
vm_map_unlock(map);
if (map == kmem_map)
splx(s);
return (result);
}
@ -1653,13 +1663,19 @@ vm_map_remove(map, start, end)
register vm_offset_t start;
register vm_offset_t end;
{
register int result;
register int result, s = 0;
if (map == kmem_map)
s = splhigh();
vm_map_lock(map);
VM_MAP_RANGE_CHECK(map, start, end);
result = vm_map_delete(map, start, end);
vm_map_unlock(map);
if (map == kmem_map)
splx(s);
return(result);
}