[PATCH v2] wireguard: allowedips: Use kfree_rcu() instead of call_rcu()
From: Fushuai Wang <hidden>
Date: 2025-10-05 13:40:15
Also in:
lkml
Subsystem:
networking drivers, the rest, wireguard secure network tunnel · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Jason A. Donenfeld
Replace call_rcu() + kmem_cache_free() with kfree_rcu() to simplify the code and reduce function size. Signed-off-by: Fushuai Wang <redacted> --- drivers/net/wireguard/allowedips.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/drivers/net/wireguard/allowedips.c b/drivers/net/wireguard/allowedips.c
index 09f7fcd7da78..5ece9acad64d 100644
--- 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,
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2.36.1