btrfs: remove orig_bytes from reserve_ticket

Now that we do not do partial filling of tickets simply remove
orig_bytes, it is no longer needed.
Reviewed-by: NNikolay Borisov <nborisov@suse.com>
Signed-off-by: NJosef Bacik <josef@toxicpanda.com>
Signed-off-by: NDavid Sterba <dsterba@suse.com>

fs/btrfs/space-info.c

@@ -920,7 +920,6 @@ static int handle_reserve_ticket(struct btrfs_fs_info *fs_info,
 				 struct reserve_ticket *ticket,
 				 enum btrfs_reserve_flush_enum flush)
 {
-	u64 reclaim_bytes = 0;
 	int ret;
 
 	switch (flush) {
@@ -945,17 +944,11 @@ static int handle_reserve_ticket(struct btrfs_fs_info *fs_info,
 	spin_lock(&space_info->lock);
 	ret = ticket->error;
 	if (ticket->bytes || ticket->error) {
-		if (ticket->bytes < ticket->orig_bytes)
-			reclaim_bytes = ticket->orig_bytes - ticket->bytes;
 		list_del_init(&ticket->list);
 		if (!ret)
 			ret = -ENOSPC;
 	}
 	spin_unlock(&space_info->lock);
-
-	if (reclaim_bytes)
-		btrfs_space_info_add_old_bytes(fs_info, space_info,
-					       reclaim_bytes);
 	ASSERT(list_empty(&ticket->list));
 	return ret;
 }
@@ -1015,7 +1008,6 @@ static int __reserve_metadata_bytes(struct btrfs_fs_info *fs_info,
 	 * the list and we will do our own flushing further down.
 	 */
 	if (ret && flush != BTRFS_RESERVE_NO_FLUSH) {
-		ticket.orig_bytes = orig_bytes;
 		ticket.bytes = orig_bytes;
 		ticket.error = 0;
 		init_waitqueue_head(&ticket.wait);

fs/btrfs/space-info.h

@@ -70,7 +70,6 @@ struct btrfs_space_info {
 };
 
 struct reserve_ticket {
-	u64 orig_bytes;
 	u64 bytes;
 	int error;
 	struct list_head list;