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59 		vm_map_unlock(ufi->map);
61 		vm_map_unlock_read(ufi->map);
84  * uvmfault_lookup: lookup a virtual address in a map
88  * => we will lookup the map entry (handling submaps) as we go
90  * => if "write_lock" is true, we write_lock the map, otherwise we only
93  *	required to use the same virtual addresses as the map they
95  *	map and the submap is unnecessary).
107 	ufi->map = ufi->orig_map;
117 		 * lock map
120 			vm_map_lock(ufi->map);
122 			vm_map_lock_read(ufi->map);
128 		if (!uvm_map_lookup_entry(ufi->map, ufi->orig_rvaddr,
141 		 * submap?    replace map with the submap and lookup again.
142 		 * note: VAs in submaps must match VAs in main map.
147 				vm_map_unlock(ufi->map);
149 				vm_map_unlock_read(ufi->map);
151 			ufi->map = tmpmap;
159 		ufi->mapv = ufi->map->timestamp;
168  * uvmfault_relock: attempt to relock the same version of the map
189 	 * relock map.   fail if version mismatch (in which case nothing
193 	vm_map_lock_read(ufi->map);
194 	if (ufi->mapv != ufi->map->timestamp) {
195 		vm_map_unlock_read(ufi->map);