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btrfs: make btrfs_destroy_delayed_refs use btrfs_delayed_ref_lock 

We have this open coded in btrfs_destroy_delayed_refs, use the helper
instead.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2018-11-21 14:05:39 -05:00 committed by David Sterba
parent d1e1442065
commit 3069bd2669
1 changed files with 2 additions and 9 deletions
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11
fs/btrfs/disk-io.c
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@ -4246,16 +4246,9 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
head = rb_entry(node, struct btrfs_delayed_ref_head,
href_node);
if (!mutex_trylock(&head->mutex)) {
refcount_inc(&head->refs);
spin_unlock(&delayed_refs->lock);
mutex_lock(&head->mutex);
mutex_unlock(&head->mutex);
btrfs_put_delayed_ref_head(head);
spin_lock(&delayed_refs->lock);
if (btrfs_delayed_ref_lock(delayed_refs, head))
continue;
}
spin_lock(&head->lock);
while ((n = rb_first_cached(&head->ref_tree)) != NULL) {
ref = rb_entry(n, struct btrfs_delayed_ref_node,