tree d7678ade2e3e47b041b58fd5ea8ad02a4019ea88
parent 30c00eda73d5db5bd64dd0c370161abd8df5ba4a
author FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> 1215156710 +0200
committer Jens Axboe <jens.axboe@oracle.com> 1215157934 +0200

scsi: sr avoids useless buffer allocation

blk_rq_map_kern can handle the stack buffers correctly (avoid DMA
from/to the stack buffers by using the bounce buffer) so we don't need
to complicate the code by allocating just 8 bytes.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>