From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 21 Aug 2025 01:58:03 +0000 (-0400)
Subject: mnt_set_expiry(): use guards
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=2605d8684320e6c09e56743e66ecac8ae581b464;p=users%2Fhch%2Fmisc.git

mnt_set_expiry(): use guards

The reason why it needs only mount_locked_reader is that there's no lockless
accesses of expiry lists.

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/namespace.c b/fs/namespace.c
index 2cb3cb8307ca..db25c81d7f68 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -3858,9 +3858,8 @@ discard:
  */
 void mnt_set_expiry(struct vfsmount *mnt, struct list_head *expiry_list)
 {
-	read_seqlock_excl(&mount_lock);
+	guard(mount_locked_reader)();
 	list_add_tail(&real_mount(mnt)->mnt_expire, expiry_list);
-	read_sequnlock_excl(&mount_lock);
 }
 EXPORT_SYMBOL(mnt_set_expiry);