diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2013-12-13 06:29:02 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2013-12-13 06:29:02 +0000 |
| commit | 5e21c070297852d0da1b8ad167417ff3c10d7167 (patch) | |
| tree | 4163c1933d1de4c3d3e8ac12fd02660443c81019 /sys/vm | |
| parent | 0734802ae46876aa587e71fe59869b1ce2266e86 (diff) | |
Notes
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/vm_map.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/sys/vm/vm_map.c b/sys/vm/vm_map.c index ba2ae6d2bdc0..3e19d81604ce 100644 --- a/sys/vm/vm_map.c +++ b/sys/vm/vm_map.c @@ -1894,6 +1894,9 @@ vm_map_protect(vm_map_t map, vm_offset_t start, vm_offset_t end, struct ucred *cred; vm_prot_t old_prot; + if (start == end) + return (KERN_SUCCESS); + vm_map_lock(map); VM_MAP_RANGE_CHECK(map, start, end); @@ -2048,12 +2051,16 @@ vm_map_madvise( case MADV_AUTOSYNC: case MADV_NOCORE: case MADV_CORE: + if (start == end) + return (KERN_SUCCESS); modify_map = 1; vm_map_lock(map); break; case MADV_WILLNEED: case MADV_DONTNEED: case MADV_FREE: + if (start == end) + return (KERN_SUCCESS); vm_map_lock_read(map); break; default: @@ -2191,6 +2198,8 @@ vm_map_inherit(vm_map_t map, vm_offset_t start, vm_offset_t end, default: return (KERN_INVALID_ARGUMENT); } + if (start == end) + return (KERN_SUCCESS); vm_map_lock(map); VM_MAP_RANGE_CHECK(map, start, end); if (vm_map_lookup_entry(map, start, &temp_entry)) { @@ -2223,6 +2232,8 @@ vm_map_unwire(vm_map_t map, vm_offset_t start, vm_offset_t end, int rv; boolean_t need_wakeup, result, user_unwire; + if (start == end) + return (KERN_SUCCESS); user_unwire = (flags & VM_MAP_WIRE_USER) ? TRUE : FALSE; vm_map_lock(map); VM_MAP_RANGE_CHECK(map, start, end); @@ -2393,6 +2404,8 @@ vm_map_wire(vm_map_t map, vm_offset_t start, vm_offset_t end, boolean_t fictitious, need_wakeup, result, user_wire; vm_prot_t prot; + if (start == end) + return (KERN_SUCCESS); prot = 0; if (flags & VM_MAP_WIRE_WRITE) prot |= VM_PROT_WRITE; @@ -2835,6 +2848,8 @@ vm_map_delete(vm_map_t map, vm_offset_t start, vm_offset_t end) vm_map_entry_t first_entry; VM_MAP_ASSERT_LOCKED(map); + if (start == end) + return (KERN_SUCCESS); /* * Find the start of the region, and clip it |