eventpoll: prefer kfree_rcu() in __ep_remove()
In '__ep_remove()', prefer 'kfree_rcu()' over 'call_rcu()' with
dummy 'epi_rcu_free()' callback. This follows commit d0089603fa7a
("fs: prefer kfree_rcu() in fasync_remove_entry()") and should not
be backported to stable as well.
Signed-off-by: Dmitry Antipov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Christian Brauner <[email protected]>
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 786e023..39ac6fd 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -678,12 +678,6 @@ static void ep_done_scan(struct eventpoll *ep,
write_unlock_irq(&ep->lock);
}
-static void epi_rcu_free(struct rcu_head *head)
-{
- struct epitem *epi = container_of(head, struct epitem, rcu);
- kmem_cache_free(epi_cache, epi);
-}
-
static void ep_get(struct eventpoll *ep)
{
refcount_inc(&ep->refcount);
@@ -767,7 +761,7 @@ static bool __ep_remove(struct eventpoll *ep, struct epitem *epi, bool force)
* ep->mtx. The rcu read side, reverse_path_check_proc(), does not make
* use of the rbn field.
*/
- call_rcu(&epi->rcu, epi_rcu_free);
+ kfree_rcu(epi, rcu);
percpu_counter_dec(&ep->user->epoll_watches);
return ep_refcount_dec_and_test(ep);
