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nilfs2: simplify device handling

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We removed all codepaths where s_umount is taken beneath open_mutex and
bd_holder_lock so don't make things more complicated than they need to
be and hold s_umount over block device opening.

CC: Ryusuke Konishi <konishi.ryusuke@gmail.com>
CC: <linux-nilfs@vger.kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20231101172739.8676-1-jack@suse.cz
Acked-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Jan Kara 2023-11-01 18:27:39 +01:00 committed by Christian Brauner
parent 24c372d582
commit 5a8e94c015
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1 changed files with 0 additions and 8 deletions
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8
fs/nilfs2/super.c
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@ -1314,15 +1314,7 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
return ERR_CAST(s);
if (!s->s_root) {
/*
* We drop s_umount here because we need to open the bdev and
* bdev->open_mutex ranks above s_umount (blkdev_put() ->
* __invalidate_device()). It is safe because we have active sb
* reference and SB_BORN is not set yet.
*/
up_write(&s->s_umount);
err = setup_bdev_super(s, flags, NULL);
down_write(&s->s_umount);
if (!err)
err = nilfs_fill_super(s, data,
flags & SB_SILENT ? 1 : 0);