block: rewrite blk_bvec_map_sg to avoid a nth_page call

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The offset in scatterlists is allowed to be larger than the page size,
so don't go to great length to avoid that case and simplify the
arithmetics.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Christoph Hellwig 2019-04-11 08:23:27 +02:00 • committed by Jens Axboe

parent 22391ac30a

commit 8a96a0e408

1 changed files with 6 additions and 15 deletions

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block/blk-merge.c

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