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raid5-cache: hold spinlock instead of mutex in r5c_journal_mode_show

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Replace mddev_lock with spin_lock to align with other show methods in
raid5_attrs.

Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
This commit is contained in:
Guoqing Jiang 2020-07-28 12:01:42 +02:00 committed by Song Liu
parent b3db8a2163
commit 01b5d32a57
1 changed files with 3 additions and 6 deletions
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9
drivers/md/raid5-cache.c
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@ -2537,13 +2537,10 @@ static ssize_t r5c_journal_mode_show(struct mddev *mddev, char *page)
struct r5conf *conf;
int ret;
ret = mddev_lock(mddev);
if (ret)
return ret;
spin_lock(&mddev->lock);
conf = mddev->private;
if (!conf || !conf->log) {
mddev_unlock(mddev);
spin_unlock(&mddev->lock);
return 0;
}
@ -2563,7 +2560,7 @@ static ssize_t r5c_journal_mode_show(struct mddev *mddev, char *page)
default:
ret = 0;
}
mddev_unlock(mddev);
spin_unlock(&mddev->lock);
return ret;
}