From: Pedro Falcato Date: Wed, 3 Sep 2025 12:59:58 +0000 (+0200) Subject: maple_tree: Use kfree_rcu in ma_free_rcu X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=9b60811cb3b42fe9a8e3f0aa3e007cd9cc814a78;p=users%2Fhch%2Fmisc.git maple_tree: Use kfree_rcu in ma_free_rcu kfree_rcu is an optimized version of call_rcu + kfree. It used to not be possible to call it on non-kmalloc objects, but this restriction was lifted ever since SLOB was dropped from the kernel, and since commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"). Thus, replace call_rcu + mt_free_rcu with kfree_rcu. Signed-off-by: Pedro Falcato Reviewed-by: Harry Yoo Reviewed-by: Suren Baghdasaryan Signed-off-by: Vlastimil Babka --- diff --git a/lib/maple_tree.c b/lib/maple_tree.c index d034f170ac89..c706e2e48f88 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -187,13 +187,6 @@ static inline void mt_free_bulk(size_t size, void __rcu **nodes) kmem_cache_free_bulk(maple_node_cache, size, (void **)nodes); } -static void mt_free_rcu(struct rcu_head *head) -{ - struct maple_node *node = container_of(head, struct maple_node, rcu); - - kmem_cache_free(maple_node_cache, node); -} - /* * ma_free_rcu() - Use rcu callback to free a maple node * @node: The node to free @@ -204,7 +197,7 @@ static void mt_free_rcu(struct rcu_head *head) static void ma_free_rcu(struct maple_node *node) { WARN_ON(node->parent != ma_parent_ptr(node)); - call_rcu(&node->rcu, mt_free_rcu); + kfree_rcu(node, rcu); } static void mt_set_height(struct maple_tree *mt, unsigned char height) @@ -5099,7 +5092,7 @@ static void mt_free_walk(struct rcu_head *head) mt_free_bulk(node->slot_len, slots); free_leaf: - mt_free_rcu(&node->rcu); + mt_free_one(node); } static inline void __rcu **mte_destroy_descend(struct maple_enode **enode, @@ -5183,7 +5176,7 @@ next: free_leaf: if (free) - mt_free_rcu(&node->rcu); + mt_free_one(node); else mt_clear_meta(mt, node, node->type); }