tree 2205ed1010c146887a329bdf953b74b04afedd87
parent e64a0e16928415648d53d721b3d6fc3635eddf92
author Christoph Hellwig <hch@lst.de> 1586850142 +0200
committer Jens Axboe <axboe@kernel.dk> 1587574026 -0600

block: provide a blk_rq_map_sg variant that returns the last element

To be able to move some of the special purpose hacks in blk_rq_map_sg
into the callers we need a variant that returns the last mapped
S/G list element to the caller.  Add that variant as __blk_rq_map_sg
and make blk_rq_map_sg a trivial inline wrapper around it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>