diff options
| author | Jacques Vidrine <nectar@FreeBSD.org> | 2002-04-15 17:18:12 +0000 |
|---|---|---|
| committer | Jacques Vidrine <nectar@FreeBSD.org> | 2002-04-15 17:18:12 +0000 |
| commit | 6fae8a85039980b82a5cf7eac8ba9e24f0b11dc3 (patch) | |
| tree | 86c432ff087dddc6b8c8bb48d7e802a3ec42b635 /sys/vm | |
| parent | 88476a7815d3226f93798ba13add8f303abf2fdc (diff) | |
Notes
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/vm_map.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c index e914dfcf9908..5c478e5ad2cf 100644 --- a/sys/vm/vm_map.c +++ b/sys/vm/vm_map.c @@ -1712,8 +1712,11 @@ vm_map_clean(map, start, end, syncio, invalidate) * to write out. * We invalidate (remove) all pages from the address space * anyway, for semantic correctness. + * + * note: certain anonymous maps, such as MAP_NOSYNC maps, + * may start out with a NULL object. */ - while (object->backing_object) { + while (object && object->backing_object) { object = object->backing_object; offset += object->backing_object_offset; if (object->size < OFF_TO_IDX( offset + size)) |