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block: implement blk_rq_pos/[cur_]sectors() and convert obvious ones

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Implement accessors - blk_rq_pos(), blk_rq_sectors() and
blk_rq_cur_sectors() which return rq->hard_sector, rq->hard_nr_sectors
and rq->hard_cur_sectors respectively and convert direct references of
the said fields to the accessors.

This is in preparation of request data length handling cleanup.

Geert	: suggested adding const to struct request * parameter to accessors
Sergei	: spotted error in patch description

[ Impact: cleanup ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Tested-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Ackec-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Borislav Petkov <petkovbb@googlemail.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Tejun Heo
2009-05-07 22:24:38 +09:00
committed by Jens Axboe
parent c3a4d78c58
commit 5b93629b45
12 changed files with 42 additions and 25 deletions
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2
drivers/message/i2o/i2o_block.c
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@@ -427,7 +427,7 @@ static void i2o_block_end_request(struct request *req, int error,
unsigned long flags;
if (blk_end_request(req, error, nr_bytes)) {
int leftover = (req->hard_nr_sectors << KERNEL_SECTOR_SHIFT);
int leftover = (blk_rq_sectors(req) << KERNEL_SECTOR_SHIFT);
if (blk_pc_request(req))
leftover = req->data_len;