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btrfs: add btrfs_delete_ref_head helper

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We do this dance in cleanup_ref_head and check_ref_cleanup, unify it
into a helper and cleanup the calling functions.

Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2018-12-03 10:20:29 -05:00 • committed by David Sterba
parent fdb1e12180
commit d7baffdaf9
3 changed files with 19 additions and 20 deletions
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14
fs/btrfs/delayed-ref.c
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@ -400,6 +400,20 @@ again:
return head;
}
void btrfs_delete_ref_head(struct btrfs_delayed_ref_root *delayed_refs,
struct btrfs_delayed_ref_head *head)
{
lockdep_assert_held(&delayed_refs->lock);
lockdep_assert_held(&head->lock);
rb_erase_cached(&head->href_node, &delayed_refs->href_root);
RB_CLEAR_NODE(&head->href_node);
atomic_dec(&delayed_refs->num_entries);
delayed_refs->num_heads--;
if (head->processing == 0)
delayed_refs->num_heads_ready--;
}
/*
* Helper to insert the ref_node to the tail or merge with tail.
*