> -----Original Message-----
> From: Linux-nvdimm [mailto:linux-nvdimm-boun...@lists.01.org] On Behalf Of 
> Goldwyn Rodrigues
> Sent: Tuesday, April 16, 2019 11:42 AM
> Subject: [PATCH 02/18] btrfs: Carve out btrfs_get_extent_map_write() out of 
> btrfs_get_blocks_write()
...
> +static int btrfs_get_blocks_direct_write(struct extent_map **map,
> +                                      struct buffer_head *bh_result,
> +                                      struct inode *inode,
> +                                      struct btrfs_dio_data *dio_data,
> +                                      u64 start, u64 len)
> +{
> +     int ret = 0;

That initialization value is not needed, since ret is always overwritten
two lines later.

> +     struct extent_map *em;
> +
> +     ret = btrfs_get_extent_map_write(map, bh_result, inode,
> +                     start, len);
> +     if (ret < 0)
> +             return ret;
> +     em = *map;

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