btrfs: Remove unused op_key var from add_delayed_refs

Added as part of 86d5f9944252 ("btrfs: convert prelimary reference
tracking to use rbtrees") but never used. tmp_op_key essentially
subsumed that variable.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 4a33448..6007dd6 100644 (file)
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -773,15 +773,12 @@ static int add_delayed_refs(const struct btrfs_fs_info *fs_info,
        struct btrfs_delayed_extent_op *extent_op = head->extent_op;
        struct btrfs_key key;
        struct btrfs_key tmp_op_key;
-       struct btrfs_key *op_key = NULL;
        struct rb_node *n;
        int count;
        int ret = 0;
 
-       if (extent_op && extent_op->update_key) {
+       if (extent_op && extent_op->update_key)
                btrfs_disk_key_to_cpu(&tmp_op_key, &extent_op->key);
-               op_key = &tmp_op_key;
-       }
 
        spin_lock(&head->lock);
        for (n = rb_first(&head->ref_tree); n; n = rb_next(n)) {