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Btrfs: pass delayed_refs directly to btrfs_find_delayed_ref_head

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All we need is @delayed_refs, all callers have get it ahead of calling
btrfs_find_delayed_ref_head since lock needs to be acquired firstly,
there is no reason to deference it again inside the function.

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
2017-01-30 12:24:37 -08:00
committed by David Sterba
parent d07b85284f
commit f72ad18e99
4 changed files with 7 additions and 9 deletions
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2
fs/btrfs/backref.c
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@@ -1284,7 +1284,7 @@ again:
*/
delayed_refs = &trans->transaction->delayed_refs;
spin_lock(&delayed_refs->lock);
head = btrfs_find_delayed_ref_head(trans, bytenr);
head = btrfs_find_delayed_ref_head(delayed_refs, bytenr);
if (head) {
if (!mutex_trylock(&head->mutex)) {
atomic_inc(&head->node.refs);