Re: [PATCH 1/7] Btrfs: make add_pinned_bytes() take an s64 num_bytes instead of u64

[Liu Bo <bo.li.liu@oracle.com>]

On Tue, Jun 06, 2017 at 04:45:26PM -0700, Omar Sandoval wrote:
> From: Omar Sandoval <osandov@fb.com>
> 
> There are a few places where we pass in a negative num_bytes, so make it
> signed for clarity. Also move it up in the file since later patches will
> need it there.
> 

Reviewed-by: Liu Bo <bo.li.liu@oracle.com>

-liubo
> Signed-off-by: Omar Sandoval <osandov@fb.com>
> ---
>  fs/btrfs/extent-tree.c | 41 ++++++++++++++++++++---------------------
>  1 file changed, 20 insertions(+), 21 deletions(-)
> 
> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
> index e390451c72e6..7c01b4e9e3b6 100644
> --- a/fs/btrfs/extent-tree.c
> +++ b/fs/btrfs/extent-tree.c
> @@ -766,6 +766,26 @@ static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info,
>  	return NULL;
>  }
>  
> +static void add_pinned_bytes(struct btrfs_fs_info *fs_info, s64 num_bytes,
> +			     u64 owner, u64 root_objectid)
> +{
> +	struct btrfs_space_info *space_info;
> +	u64 flags;
> +
> +	if (owner < BTRFS_FIRST_FREE_OBJECTID) {
> +		if (root_objectid == BTRFS_CHUNK_TREE_OBJECTID)
> +			flags = BTRFS_BLOCK_GROUP_SYSTEM;
> +		else
> +			flags = BTRFS_BLOCK_GROUP_METADATA;
> +	} else {
> +		flags = BTRFS_BLOCK_GROUP_DATA;
> +	}
> +
> +	space_info = __find_space_info(fs_info, flags);
> +	BUG_ON(!space_info); /* Logic bug */
> +	percpu_counter_add(&space_info->total_bytes_pinned, num_bytes);
> +}
> +
>  /*
>   * after adding space to the filesystem, we need to clear the full flags
>   * on all the space infos.
> @@ -6793,27 +6813,6 @@ int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans,
>  	return 0;
>  }
>  
> -static void add_pinned_bytes(struct btrfs_fs_info *fs_info, u64 num_bytes,
> -			     u64 owner, u64 root_objectid)
> -{
> -	struct btrfs_space_info *space_info;
> -	u64 flags;
> -
> -	if (owner < BTRFS_FIRST_FREE_OBJECTID) {
> -		if (root_objectid == BTRFS_CHUNK_TREE_OBJECTID)
> -			flags = BTRFS_BLOCK_GROUP_SYSTEM;
> -		else
> -			flags = BTRFS_BLOCK_GROUP_METADATA;
> -	} else {
> -		flags = BTRFS_BLOCK_GROUP_DATA;
> -	}
> -
> -	space_info = __find_space_info(fs_info, flags);
> -	BUG_ON(!space_info); /* Logic bug */
> -	percpu_counter_add(&space_info->total_bytes_pinned, num_bytes);
> -}
> -
> -
>  static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
>  				struct btrfs_fs_info *info,
>  				struct btrfs_delayed_ref_node *node, u64 parent,
> -- 
> 2.13.0
>