Index: head/sys/vm/vm_map.h
===================================================================
--- head/sys/vm/vm_map.h
+++ head/sys/vm/vm_map.h
@@ -229,6 +229,8 @@
 #define	vm_map_max(map)		vm_map_max_KBI((map))
 #define	vm_map_min(map)		vm_map_min_KBI((map))
 #define	vm_map_pmap(map)	vm_map_pmap_KBI((map))
+#define	vm_map_range_valid(map, start, end)	\
+	vm_map_range_valid_KBI((map), (start), (end))
 #else
 static __inline vm_offset_t
 vm_map_max(const struct vm_map *map)
@@ -330,6 +332,7 @@
 vm_offset_t vm_map_max_KBI(const struct vm_map *map);
 vm_offset_t vm_map_min_KBI(const struct vm_map *map);
 pmap_t vm_map_pmap_KBI(vm_map_t map);
+bool vm_map_range_valid_KBI(vm_map_t map, vm_offset_t start, vm_offset_t end);
 
 #define	vm_map_lock(map)	_vm_map_lock(map, LOCK_FILE, LOCK_LINE)
 #define	vm_map_unlock(map)	_vm_map_unlock(map, LOCK_FILE, LOCK_LINE)
Index: head/sys/vm/vm_map.c
===================================================================
--- head/sys/vm/vm_map.c
+++ head/sys/vm/vm_map.c
@@ -5014,6 +5014,13 @@
 	return (map->pmap);
 }
 
+bool
+vm_map_range_valid_KBI(vm_map_t map, vm_offset_t start, vm_offset_t end)
+{
+
+	return (vm_map_range_valid(map, start, end));
+}
+
 #ifdef INVARIANTS
 static void
 _vm_map_assert_consistent(vm_map_t map, int check)