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fs: don't open-code mnt_hold_writers()

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Remove sb_prepare_remount_readonly()'s open-coded mnt_hold_writers()
implementation with the real helper we introduced in commit fbdc2f6c40
("fs: split out functions to hold writers").

Link: https://lore.kernel.org/r/20220203131411.3093040-7-brauner@kernel.org
Cc: Seth Forshee <seth.forshee@digitalocean.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2022-02-03 14:14:10 +01:00
parent 03b6abee9b
commit ad1844a012
No known key found for this signature in database
GPG key ID: 91C61BC06578DCA2
1 changed files with 2 additions and 5 deletions
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7
fs/namespace.c
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@ -563,14 +563,11 @@ int sb_prepare_remount_readonly(struct super_block *sb)
lock_mount_hash();
list_for_each_entry(mnt, &sb->s_mounts, mnt_instance) {
if (!(mnt->mnt.mnt_flags & MNT_READONLY)) {
mnt->mnt.mnt_flags |= MNT_WRITE_HOLD;
smp_mb();
if (mnt_get_writers(mnt) > 0) {
err = -EBUSY;
err = mnt_hold_writers(mnt);
if (err)
break;
}
}
}
if (!err && atomic_long_read(&sb->s_remove_count))
err = -EBUSY;