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maple_tree: Use kfree_rcu in ma_free_rcu

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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
6c6c47b063 ("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 <pfalcato@suse.de>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Pedro Falcato
2025-09-03 14:59:58 +02:00
committed by Vlastimil Babka
parent 551a6e757a
commit 9b60811cb3
1 changed files with 3 additions and 10 deletions
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13
lib/maple_tree.c
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@@ -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 @@ static void mt_destroy_walk(struct maple_enode *enode, struct maple_tree *mt,
free_leaf:
if (free)
mt_free_rcu(&node->rcu);
mt_free_one(node);
else
mt_clear_meta(mt, node, node->type);
}