Re: [RFC v2 1/3] block: Introduce blk_bio_map_sg() to map one bio

[Jens Axboe]

On 05/27/2016 05:11 AM, Baolin Wang wrote:
> In dm-crypt, it need to map one bio to scatterlist for improving the
> hardware engine encryption efficiency. Thus this patch introduces the
> blk_bio_map_sg() function to map one bio with scatterlists.
>
> For avoiding the duplicated code in __blk_bios_map_sg() function, add
> one parameter to distinguish bio map or request map.

Just detach the bio in blk_bio_map_sg() instead of adding a separate 
case (and argument) for it in __blk_bios_map_sg().

--
Jens Axboe