diff options
| author | John Dyson <dyson@FreeBSD.org> | 1996-10-24 02:56:23 +0000 |
|---|---|---|
| committer | John Dyson <dyson@FreeBSD.org> | 1996-10-24 02:56:23 +0000 |
| commit | fcae040bc0c0752ce32f57a47405acddca71b92c (patch) | |
| tree | 1e37a15df69dbc4147c91c9de29f9b90119546d2 /sys/vm | |
| parent | c864a7c0a97310cb8d4e7e4ce871cb2843a52a16 (diff) | |
Notes
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/vm_mmap.c | 29 |
1 files changed, 5 insertions, 24 deletions
diff --git a/sys/vm/vm_mmap.c b/sys/vm/vm_mmap.c index c21e55e9db70..fdaf87eb1c8f 100644 --- a/sys/vm/vm_mmap.c +++ b/sys/vm/vm_mmap.c @@ -38,7 +38,7 @@ * from: Utah $Hdr: vm_mmap.c 1.6 91/10/21$ * * @(#)vm_mmap.c 8.4 (Berkeley) 1/12/94 - * $Id: vm_mmap.c,v 1.50 1996/09/19 10:12:41 davidg Exp $ + * $Id: vm_mmap.c,v 1.51 1996/10/13 07:16:50 phk Exp $ */ /* @@ -843,7 +843,7 @@ vm_mmap(map, addr, size, prot, maxprot, flags, handle, foff) vm_ooffset_t foff; { boolean_t fitit; - vm_object_t object, object2; + vm_object_t object; struct vnode *vp = NULL; objtype_t type; int rv = KERN_SUCCESS; @@ -915,28 +915,12 @@ vm_mmap(map, addr, size, prot, maxprot, flags, handle, foff) flags |= MAP_SHARED; } - object2 = NULL; docow = 0; if ((flags & (MAP_ANON|MAP_SHARED)) == 0) { - docow = MAP_COPY_ON_WRITE; - if (objsize < size) { - object2 = vm_object_allocate( OBJT_DEFAULT, - OFF_TO_IDX(size - (foff & ~PAGE_MASK))); - object2->backing_object = object; - object2->backing_object_offset = foff; - TAILQ_INSERT_TAIL(&object->shadow_head, - object2, shadow_list); - ++object->shadow_count; - } else { - docow |= MAP_COPY_NEEDED; - } + docow = MAP_COPY_ON_WRITE | MAP_COPY_NEEDED; } - if (object2) - rv = vm_map_find(map, object2, 0, addr, size, fitit, - prot, maxprot, docow); - else - rv = vm_map_find(map, object, foff, addr, size, fitit, + rv = vm_map_find(map, object, foff, addr, size, fitit, prot, maxprot, docow); @@ -946,10 +930,7 @@ vm_mmap(map, addr, size, prot, maxprot, flags, handle, foff) * object if it's an unnamed anonymous mapping * or named anonymous without other references. */ - if (object2) - vm_object_deallocate(object2); - else - vm_object_deallocate(object); + vm_object_deallocate(object); goto out; } |