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quota: use lockdep_assert_held_write in dquot_load_quota_sb 

Use lockdep_assert_held_write to assert and self-document the locking
state in dquot_load_quota_sb instead of hand-crafting it with a trylock.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230802115439.2145212-2-hch@lst.de>
This commit is contained in:
Christoph Hellwig 2023-08-02 13:54:39 +02:00 committed by Jan Kara
parent 2363650b22
commit 7a64774add
1 changed files with 2 additions and 3 deletions
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5
fs/quota/dquot.c
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@ -2365,11 +2365,10 @@ int dquot_load_quota_sb(struct super_block *sb, int type, int format_id,
struct quota_info *dqopt = sb_dqopt(sb);
int error;
lockdep_assert_held_write(&sb->s_umount);
/* Just unsuspend quotas? */
BUG_ON(flags & DQUOT_SUSPENDED);
/* s_umount should be held in exclusive mode */
if (WARN_ON_ONCE(down_read_trylock(&sb->s_umount)))
up_read(&sb->s_umount);
if (!fmt)
return -ESRCH;