On 3 June 2016 at 22:35, Jens Axboe [off-list ref] wrote:

On 05/27/2016 05:11 AM, Baolin Wang wrote:

quoted

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().

Make sense.

--
Jens Axboe

-- 
Baolin.wang
Best Regards