linux-kernel - [PATCH 07/17] eCryptfs: replace call_rcu by kfree_rcu for simple kmem_cache

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Message-Id: <20241013201704.49576-8-Julia.Lawall@inria.fr>
Date: Sun, 13 Oct 2024 22:16:54 +0200
From: Julia Lawall <Julia.Lawall@...ia.fr>
To: Tyler Hicks <code@...icks.com>
Cc: kernel-janitors@...r.kernel.org,
	vbabka@...e.cz,
	paulmck@...nel.org,
	ecryptfs@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 07/17] eCryptfs: replace call_rcu by kfree_rcu for simple kmem_cache_free callback

Since SLOB was removed and since
commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"),
it is not necessary to use call_rcu when the callback only performs
kmem_cache_free. Use kfree_rcu() directly.

The changes were made using Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@...ia.fr>

---
 fs/ecryptfs/dentry.c |    8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index acaa0825e9bb..49d626ff33a9 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -51,12 +51,6 @@ static int ecryptfs_d_revalidate(struct dentry *dentry, unsigned int flags)
 
 struct kmem_cache *ecryptfs_dentry_info_cache;
 
-static void ecryptfs_dentry_free_rcu(struct rcu_head *head)
-{
-	kmem_cache_free(ecryptfs_dentry_info_cache,
-		container_of(head, struct ecryptfs_dentry_info, rcu));
-}
-
 /**
  * ecryptfs_d_release
  * @dentry: The ecryptfs dentry
@@ -68,7 +62,7 @@ static void ecryptfs_d_release(struct dentry *dentry)
 	struct ecryptfs_dentry_info *p = dentry->d_fsdata;
 	if (p) {
 		path_put(&p->lower_path);
-		call_rcu(&p->rcu, ecryptfs_dentry_free_rcu);
+		kfree_rcu(p, rcu);
 	}
 }