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Btrfs: remove unused wait in btrfs_stripe_hash 

In fact nobody is waiting on @wait's waitqueue, it can be safely
removed.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Liu Bo 2017-12-22 16:23:01 -07:00 committed by David Sterba
parent 36f7894f66
commit 203e02d934
2 changed files with 0 additions and 11 deletions
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1
fs/btrfs/ctree.h
View File

@ -679,7 +679,6 @@ enum btrfs_orphan_cleanup_state {
/* used by the raid56 code to lock stripes for read/modify/write */ /* used by the raid56 code to lock stripes for read/modify/write */
struct btrfs_stripe_hash { struct btrfs_stripe_hash {
struct list_head hash_list; struct list_head hash_list;
wait_queue_head_t wait;
spinlock_t lock; spinlock_t lock;
}; };

10
fs/btrfs/raid56.c
View File

@ -231,7 +231,6 @@ int btrfs_alloc_stripe_hash_table(struct btrfs_fs_info *info)
cur = h + i; cur = h + i;
INIT_LIST_HEAD(&cur->hash_list); INIT_LIST_HEAD(&cur->hash_list);
spin_lock_init(&cur->lock); spin_lock_init(&cur->lock);
init_waitqueue_head(&cur->wait);
} }
x = cmpxchg(&info->stripe_hash_table, NULL, table); x = cmpxchg(&info->stripe_hash_table, NULL, table);
@ -815,15 +814,6 @@ static noinline void unlock_stripe(struct btrfs_raid_bio *rbio)
} }
goto done_nolock; goto done_nolock;
/*
* The barrier for this waitqueue_active is not needed,
* we're protected by h->lock and can't miss a wakeup.
*/
} else if (waitqueue_active(&h->wait)) {
spin_unlock(&rbio->bio_list_lock);
spin_unlock_irqrestore(&h->lock, flags);
wake_up(&h->wait);
goto done_nolock;
} }
} }
done: done: