diff options
Diffstat (limited to 'sys/vm/vm_map.c')
| -rw-r--r-- | sys/vm/vm_map.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c index f8089e268ba..af5713ea852 100644 --- a/sys/vm/vm_map.c +++ b/sys/vm/vm_map.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vm_map.c,v 1.3 1996/07/23 23:54:23 deraadt Exp $ */ +/* $OpenBSD: vm_map.c,v 1.4 1997/04/17 01:25:19 niklas Exp $ */ /* $NetBSD: vm_map.c,v 1.23 1996/02/10 00:08:08 christos Exp $ */ /* @@ -1753,13 +1753,11 @@ vm_map_copy_entry(src_map, dst_map, src_entry, dst_entry) * Make a copy of the object. */ temp_object = dst_entry->object.vm_object; - vm_object_copy(src_entry->object.vm_object, - src_entry->offset, - (vm_size_t)(src_entry->end - - src_entry->start), - &dst_entry->object.vm_object, - &dst_entry->offset, - &src_needs_copy); + vm_object_copy(src_entry->object.vm_object, src_entry->offset, + (vm_size_t)(src_entry->end - src_entry->start), + &dst_entry->object.vm_object, &dst_entry->offset, + &src_needs_copy); + /* * If we didn't get a copy-object now, mark the * source map entry so that a shadow will be created @@ -1770,9 +1768,12 @@ vm_map_copy_entry(src_map, dst_map, src_entry, dst_entry) /* * The destination always needs to have a shadow - * created. + * created, unless it's a zero-fill entry. */ - dst_entry->needs_copy = TRUE; + if (dst_entry->object.vm_object != NULL) + dst_entry->needs_copy = TRUE; + else + dst_entry->needs_copy = FALSE; /* * Mark the entries copy-on-write, so that write-enabling |