[PATCH v2 for-4.21 4/6] radix-tree: drop "root" parameters from radix_tree_node_{alloc,free}()

[Jan Beulich <jbeulich@xxxxxxxx>]

They aren't used anymore.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v2: New.

--- a/xen/common/radix-tree.c
+++ b/xen/common/radix-tree.c
@@ -60,16 +60,14 @@ static void cf_check _rcu_node_free(stru
        xfree(rcu_node);
 }
 
-static struct radix_tree_node *radix_tree_node_alloc(
-       struct radix_tree_root *root)
+static struct radix_tree_node *radix_tree_node_alloc(void)
 {
        struct rcu_node *rcu_node = xzalloc(struct rcu_node);
 
        return rcu_node ? &rcu_node->node : NULL;
 }
 
-static void radix_tree_node_free(
-       struct radix_tree_root *root, struct radix_tree_node *node)
+static void radix_tree_node_free(struct radix_tree_node *node)
 {
        struct rcu_node *rcu_node = container_of(node, struct rcu_node, node);
        call_rcu(&rcu_node->rcu_head, _rcu_node_free);
@@ -104,7 +102,7 @@ static int radix_tree_extend(struct radi
 
        do {
                unsigned int newheight;
-               if (!(node = radix_tree_node_alloc(root)))
+               if (!(node = radix_tree_node_alloc()))
                        return -ENOMEM;
 
                /* Increase the height.  */
@@ -155,7 +153,7 @@ int radix_tree_insert(struct radix_tree_
        while (height > 0) {
                if (slot == NULL) {
                        /* Have to add a child node.  */
-                       if (!(slot = radix_tree_node_alloc(root)))
+                       if (!(slot = radix_tree_node_alloc()))
                                return -ENOMEM;
                        slot->height = height;
                        if (node) {
@@ -574,7 +572,7 @@ static inline void radix_tree_shrink(str
                        *((unsigned long *)&to_free->slots[0]) |=
                                                RADIX_TREE_INDIRECT_PTR;
 
-               radix_tree_node_free(root, to_free);
+               radix_tree_node_free(to_free);
        }
 }
 
@@ -639,7 +637,7 @@ void *radix_tree_delete(struct radix_tre
                 * last reference to it disappears (set NULL, above).
                 */
                if (to_free)
-                       radix_tree_node_free(root, to_free);
+                       radix_tree_node_free(to_free);
 
                if (pathp->node->count) {
                        if (pathp->node == indirect_to_ptr(root->rnode))
@@ -655,7 +653,7 @@ void *radix_tree_delete(struct radix_tre
        root->height = 0;
        root->rnode = NULL;
        if (to_free)
-               radix_tree_node_free(root, to_free);
+               radix_tree_node_free(to_free);
 
 out:
        return slot;
@@ -682,7 +680,7 @@ radix_tree_node_destroy(
                }
        }
 
-       radix_tree_node_free(root, node);
+       radix_tree_node_free(node);
 }
 
 void radix_tree_destroy(