diff --git a/sys/sys/_pctrie.h b/sys/sys/_pctrie.h
index 45f69b20849c..c6d13baa992f 100644
--- a/sys/sys/_pctrie.h
+++ b/sys/sys/_pctrie.h
@@ -38,14 +38,4 @@ struct pctrie {
 	uintptr_t	pt_root;
 };
 
-#ifdef _KERNEL
-
-static __inline boolean_t
-pctrie_is_empty(struct pctrie *ptree)
-{
-
-	return (ptree->pt_root == 0);
-}
-
-#endif /* _KERNEL */
 #endif /* !__SYS_PCTRIE_H_ */
diff --git a/sys/sys/pctrie.h b/sys/sys/pctrie.h
index f736877cc2b4..0c0af309b129 100644
--- a/sys/sys/pctrie.h
+++ b/sys/sys/pctrie.h
@@ -119,5 +119,19 @@ void		pctrie_remove(struct pctrie *ptree, uint64_t key,
 size_t		pctrie_node_size(void);
 int		pctrie_zone_init(void *mem, int size, int flags);
 
+static __inline void
+pctrie_init(struct pctrie *ptree)
+{
+
+	ptree->pt_root = 0;
+}
+
+static __inline boolean_t
+pctrie_is_empty(struct pctrie *ptree)
+{
+
+	return (ptree->pt_root == 0);
+}
+
 #endif /* _KERNEL */
 #endif /* !_SYS_PCTRIE_H_ */
diff --git a/sys/vm/_vm_radix.h b/sys/vm/_vm_radix.h
index f06646240b2a..f061a5fefdee 100644
--- a/sys/vm/_vm_radix.h
+++ b/sys/vm/_vm_radix.h
@@ -38,14 +38,4 @@ struct vm_radix {
 	uintptr_t	rt_root;
 };
 
-#ifdef _KERNEL
-
-static __inline boolean_t
-vm_radix_is_empty(struct vm_radix *rtree)
-{
-
-	return (rtree->rt_root == 0);
-}
-
-#endif /* _KERNEL */
 #endif /* !__VM_RADIX_H_ */
diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c
index a751ac6ea2ff..6c6137d5fb22 100644
--- a/sys/vm/vm_object.c
+++ b/sys/vm/vm_object.c
@@ -204,7 +204,7 @@ vm_object_zinit(void *mem, int size, int flags)
 	/* These are true for any object that has been freed */
 	object->type = OBJT_DEAD;
 	object->ref_count = 0;
-	object->rtree.rt_root = 0;
+	vm_radix_init(&object->rtree);
 	object->paging_in_progress = 0;
 	object->resident_page_count = 0;
 	object->shadow_count = 0;
@@ -301,7 +301,7 @@ vm_object_init(void)
 #endif
 	    vm_object_zinit, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
 
-	vm_radix_init();
+	vm_radix_zinit();
 }
 
 void
diff --git a/sys/vm/vm_radix.c b/sys/vm/vm_radix.c
index 4f0a57560ec9..1a19dd93af93 100644
--- a/sys/vm/vm_radix.c
+++ b/sys/vm/vm_radix.c
@@ -310,7 +310,7 @@ SYSINIT(vm_radix_reserve_kva, SI_SUB_KMEM, SI_ORDER_THIRD,
  * Initialize the UMA slab zone.
  */
 void
-vm_radix_init(void)
+vm_radix_zinit(void)
 {
 
 	vm_radix_node_zone = uma_zcreate("RADIX NODE",
diff --git a/sys/vm/vm_radix.h b/sys/vm/vm_radix.h
index b8a722d20468..d96e50b01e48 100644
--- a/sys/vm/vm_radix.h
+++ b/sys/vm/vm_radix.h
@@ -35,7 +35,6 @@
 
 #ifdef _KERNEL
 
-void		vm_radix_init(void);
 int		vm_radix_insert(struct vm_radix *rtree, vm_page_t page);
 boolean_t	vm_radix_is_singleton(struct vm_radix *rtree);
 vm_page_t	vm_radix_lookup(struct vm_radix *rtree, vm_pindex_t index);
@@ -44,6 +43,21 @@ vm_page_t	vm_radix_lookup_le(struct vm_radix *rtree, vm_pindex_t index);
 void		vm_radix_reclaim_allnodes(struct vm_radix *rtree);
 vm_page_t	vm_radix_remove(struct vm_radix *rtree, vm_pindex_t index);
 vm_page_t	vm_radix_replace(struct vm_radix *rtree, vm_page_t newpage);
+void		vm_radix_zinit(void);
+
+static __inline void
+vm_radix_init(struct vm_radix *rtree)
+{
+
+	rtree->rt_root = 0;
+}
+
+static __inline boolean_t
+vm_radix_is_empty(struct vm_radix *rtree)
+{
+
+	return (rtree->rt_root == 0);
+}
 
 #endif /* _KERNEL */
 #endif /* !_VM_RADIX_H_ */