On 9.07.2018 09:52, Qu Wenruo wrote:
> This function is never used by any one in kernel, just remove it.
>
> Signed-off-by: Qu Wenruo <[email protected]>
Reviewed-by: Nikolay Borisov <[email protected]>
> ---
> fs/btrfs/volumes.c | 85 ----------------------------------------------
> fs/btrfs/volumes.h | 2 --
> 2 files changed, 87 deletions(-)
>
> diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
> index b33bf29130b6..e6a8e4aabc66 100644
> --- a/fs/btrfs/volumes.c
> +++ b/fs/btrfs/volumes.c
> @@ -1259,91 +1259,6 @@ int btrfs_scan_one_device(const char *path, fmode_t
> flags, void *holder,
> return ret;
> }
>
> -/* helper to account the used device space in the range */
> -int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
> - u64 end, u64 *length)
> -{
> - struct btrfs_key key;
> - struct btrfs_root *root = device->fs_info->dev_root;
> - struct btrfs_dev_extent *dev_extent;
> - struct btrfs_path *path;
> - u64 extent_end;
> - int ret;
> - int slot;
> - struct extent_buffer *l;
> -
> - *length = 0;
> -
> - if (start >= device->total_bytes ||
> - test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state))
> - return 0;
> -
> - path = btrfs_alloc_path();
> - if (!path)
> - return -ENOMEM;
> - path->reada = READA_FORWARD;
> -
> - key.objectid = device->devid;
> - key.offset = start;
> - key.type = BTRFS_DEV_EXTENT_KEY;
> -
> - ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
> - if (ret < 0)
> - goto out;
> - if (ret > 0) {
> - ret = btrfs_previous_item(root, path, key.objectid, key.type);
> - if (ret < 0)
> - goto out;
> - }
> -
> - while (1) {
> - l = path->nodes[0];
> - slot = path->slots[0];
> - if (slot >= btrfs_header_nritems(l)) {
> - ret = btrfs_next_leaf(root, path);
> - if (ret == 0)
> - continue;
> - if (ret < 0)
> - goto out;
> -
> - break;
> - }
> - btrfs_item_key_to_cpu(l, &key, slot);
> -
> - if (key.objectid < device->devid)
> - goto next;
> -
> - if (key.objectid > device->devid)
> - break;
> -
> - if (key.type != BTRFS_DEV_EXTENT_KEY)
> - goto next;
> -
> - dev_extent = btrfs_item_ptr(l, slot, struct btrfs_dev_extent);
> - extent_end = key.offset + btrfs_dev_extent_length(l,
> - dev_extent);
> - if (key.offset <= start && extent_end > end) {
> - *length = end - start + 1;
> - break;
> - } else if (key.offset <= start && extent_end > start)
> - *length += extent_end - start;
> - else if (key.offset > start && extent_end <= end)
> - *length += extent_end - key.offset;
> - else if (key.offset > start && key.offset <= end) {
> - *length += end - key.offset + 1;
> - break;
> - } else if (key.offset > end)
> - break;
> -
> -next:
> - path->slots[0]++;
> - }
> - ret = 0;
> -out:
> - btrfs_free_path(path);
> - return ret;
> -}
> -
> static int contains_pending_extent(struct btrfs_transaction *transaction,
> struct btrfs_device *device,
> u64 *start, u64 len)
> diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
> index 77e6004b6cb9..6d4f38ad9f5c 100644
> --- a/fs/btrfs/volumes.h
> +++ b/fs/btrfs/volumes.h
> @@ -384,8 +384,6 @@ static inline enum btrfs_map_op btrfs_op(struct bio *bio)
> }
> }
>
> -int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
> - u64 end, u64 *length);
> void btrfs_get_bbio(struct btrfs_bio *bbio);
> void btrfs_put_bbio(struct btrfs_bio *bbio);
> int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
>
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