wireguard: allowedips: Use kfree_rcu() instead of call_rcu()

Replace call_rcu() + kmem_cache_free() with kfree_rcu() to simplify
the code and reduce function size.

Signed-off-by: Fushuai Wang <wangfushuai@baidu.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Link: https://patch.msgid.link/20260414153944.2742252-2-Jason@zx2c4.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/wireguard/allowedips.c b/drivers/net/wireguard/allowedips.c
index 09f7fcd7da78bb29ab4436e0c6188215e12bea69..5ece9acad64d81c2347457199c3fb4acf3284473 100644 (file)
--- a/drivers/net/wireguard/allowedips.c
+++ b/drivers/net/wireguard/allowedips.c
@@ -48,11 +48,6 @@ static void push_rcu(struct allowedips_node **stack,
        }
 }
 
-static void node_free_rcu(struct rcu_head *rcu)
-{
-       kmem_cache_free(node_cache, container_of(rcu, struct allowedips_node, rcu));
-}
-
 static void root_free_rcu(struct rcu_head *rcu)
 {
        struct allowedips_node *node, *stack[MAX_ALLOWEDIPS_DEPTH] = {
@@ -271,13 +266,13 @@ static void remove_node(struct allowedips_node *node, struct mutex *lock)
        if (free_parent)
                child = rcu_dereference_protected(parent->bit[!(node->parent_bit_packed & 1)],
                                                  lockdep_is_held(lock));
-       call_rcu(&node->rcu, node_free_rcu);
+       kfree_rcu(node, rcu);
        if (!free_parent)
                return;
        if (child)
                child->parent_bit_packed = parent->parent_bit_packed;
        *(struct allowedips_node **)(parent->parent_bit_packed & ~3UL) = child;
-       call_rcu(&parent->rcu, node_free_rcu);
+       kfree_rcu(parent, rcu);
 }
 
 static int remove(struct allowedips_node __rcu **trie, u8 bits, const u8 *key,