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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 <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Acked-by: Stephen Rothwell <[email protected]>
Tested-by: Grant Likely <[email protected]>
Acked-by: Grant Likely <[email protected]>
Ackec-by: Sergei Shtylyov <[email protected]>
Cc: Bartlomiej Zolnierkiewicz <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: James Bottomley <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Tejun Heo 2009-05-07 22:24:38 +09:00 • committed by Jens Axboe
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;