btrfs: Remove extraneous chunk_objectid variable

BTRFS_FIRST_CHUNK_TREE_OBJECTIS id the only objectid being used in the
chunk_tree. So remove a variable which is always set to that value and collapse
its usage in callees which are passed this variable. No functional changes
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/volumes.c

@@ -2712,8 +2712,7 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans,
 }
 
 static int btrfs_free_chunk(struct btrfs_trans_handle *trans,
-			    struct btrfs_fs_info *fs_info, u64 chunk_objectid,
-			    u64 chunk_offset)
+			    struct btrfs_fs_info *fs_info, u64 chunk_offset)
 {
 	struct btrfs_root *root = fs_info->chunk_root;
 	int ret;
@@ -2724,7 +2723,7 @@ static int btrfs_free_chunk(struct btrfs_trans_handle *trans,
 	if (!path)
 		return -ENOMEM;
 
-	key.objectid = chunk_objectid;
+	key.objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
 	key.offset = chunk_offset;
 	key.type = BTRFS_CHUNK_ITEM_KEY;
 
@@ -2747,8 +2746,7 @@ static int btrfs_free_chunk(struct btrfs_trans_handle *trans,
 	return ret;
 }
 
-static int btrfs_del_sys_chunk(struct btrfs_fs_info *fs_info,
-			       u64 chunk_objectid, u64 chunk_offset)
+static int btrfs_del_sys_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset)
 {
 	struct btrfs_super_block *super_copy = fs_info->super_copy;
 	struct btrfs_disk_key *disk_key;
@@ -2781,7 +2779,7 @@ static int btrfs_del_sys_chunk(struct btrfs_fs_info *fs_info,
 			ret = -EIO;
 			break;
 		}
-		if (key.objectid == chunk_objectid &&
+		if (key.objectid == BTRFS_FIRST_CHUNK_TREE_OBJECTID &&
 		    key.offset == chunk_offset) {
 			memmove(ptr, ptr + len, array_size - (cur + len));
 			array_size -= len;
@@ -2830,7 +2828,6 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
 	struct extent_map *em;
 	struct map_lookup *map;
 	u64 dev_extent_len = 0;
-	u64 chunk_objectid = BTRFS_FIRST_CHUNK_TREE_OBJECTID;
 	int i, ret = 0;
 	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
 
@@ -2886,7 +2883,7 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
 	}
 	mutex_unlock(&fs_devices->device_list_mutex);
 
-	ret = btrfs_free_chunk(trans, fs_info, chunk_objectid, chunk_offset);
+	ret = btrfs_free_chunk(trans, fs_info, chunk_offset);
 	if (ret) {
 		btrfs_abort_transaction(trans, ret);
 		goto out;
@@ -2895,8 +2892,7 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
 	trace_btrfs_chunk_free(fs_info, map, chunk_offset, em->len);
 
 	if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
-		ret = btrfs_del_sys_chunk(fs_info, chunk_objectid,
-					  chunk_offset);
+		ret = btrfs_del_sys_chunk(fs_info, chunk_offset);
 		if (ret) {
 			btrfs_abort_transaction(trans, ret);
 			goto out;