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
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
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