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md: factor out a helper from mddev_put()

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There are no functional changes, prepare to simplify md_seq_ops in next
patch.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230927061241.1552837-2-yukuai1@huaweicloud.com
This commit is contained in:
Yu Kuai 2023-09-27 14:12:40 +08:00 committed by Song Liu
parent ceb0416383
commit 3d8d32873c
1 changed files with 17 additions and 12 deletions
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29
drivers/md/md.c
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@ -616,23 +616,28 @@ static inline struct mddev *mddev_get(struct mddev *mddev)
static void mddev_delayed_delete(struct work_struct *ws);
static void __mddev_put(struct mddev *mddev)
{
if (mddev->raid_disks || !list_empty(&mddev->disks) ||
mddev->ctime || mddev->hold_active)
return;
/* Array is not configured at all, and not held active, so destroy it */
set_bit(MD_DELETED, &mddev->flags);
/*
* Call queue_work inside the spinlock so that flush_workqueue() after
* mddev_find will succeed in waiting for the work to be done.
*/
queue_work(md_misc_wq, &mddev->del_work);
}
void mddev_put(struct mddev *mddev)
{
if (!atomic_dec_and_lock(&mddev->active, &all_mddevs_lock))
return;
if (!mddev->raid_disks && list_empty(&mddev->disks) &&
mddev->ctime == 0 && !mddev->hold_active) {
/* Array is not configured at all, and not held active,
* so destroy it */
set_bit(MD_DELETED, &mddev->flags);
/*
* Call queue_work inside the spinlock so that
* flush_workqueue() after mddev_find will succeed in waiting
* for the work to be done.
*/
queue_work(md_misc_wq, &mddev->del_work);
}
__mddev_put(mddev);
spin_unlock(&all_mddevs_lock);
}