Btrfs: remove unused key assignment when doing a full send

At send.c:full_send_tree() we were setting the 'key' variable in the loop
while never using it later. We were also using two btrfs_key variables
to store the initial key for search and the key found in every iteration
of the loop. So remove this useless key assignment and use the same
btrfs_key variable to store the initial search key and the key found in
each iteration. This was introduced in the initial send commit but was
never used (commit 31db9f7c23fb ("Btrfs: introduce BTRFS_IOC_SEND for
btrfs send/receive").

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 6ff7a13..42e04cd 100644 (file)
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -6325,7 +6325,6 @@ static int full_send_tree(struct send_ctx *sctx)
        int ret;
        struct btrfs_root *send_root = sctx->send_root;
        struct btrfs_key key;
-       struct btrfs_key found_key;
        struct btrfs_path *path;
        struct extent_buffer *eb;
        int slot;
@@ -6347,17 +6346,13 @@ static int full_send_tree(struct send_ctx *sctx)
        while (1) {
                eb = path->nodes[0];
                slot = path->slots[0];
-               btrfs_item_key_to_cpu(eb, &found_key, slot);
+               btrfs_item_key_to_cpu(eb, &key, slot);
 
-               ret = changed_cb(path, NULL, &found_key,
+               ret = changed_cb(path, NULL, &key,
                                 BTRFS_COMPARE_TREE_NEW, sctx);
                if (ret < 0)
                        goto out;
 
-               key.objectid = found_key.objectid;
-               key.type = found_key.type;
-               key.offset = found_key.offset + 1;
-
                ret = btrfs_next_item(send_root, path);
                if (ret < 0)
                        goto out;