btrfs: remove delayed_ref_node from ref_head
This is just excessive information in the ref_head, and makes the code
complicated. It is a relic from when we had the heads and the refs in
the same tree, which is no longer the case. With this removal I've
cleaned up a bunch of the cruft around this old assumption as well.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index b517ef1..33cba1a 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1178,7 +1178,7 @@
head = btrfs_find_delayed_ref_head(delayed_refs, bytenr);
if (head) {
if (!mutex_trylock(&head->mutex)) {
- refcount_inc(&head->node.refs);
+ refcount_inc(&head->refs);
spin_unlock(&delayed_refs->lock);
btrfs_release_path(path);
@@ -1189,7 +1189,7 @@
*/
mutex_lock(&head->mutex);
mutex_unlock(&head->mutex);
- btrfs_put_delayed_ref(&head->node);
+ btrfs_put_delayed_ref_head(head);
goto again;
}
spin_unlock(&delayed_refs->lock);