GitHub-Mirror/linux-bl808
2
0
Fork 0
mirror of https://github.com/Fishwaldo/linux-bl808.git synced 2025-06-17 20:25:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

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

Browse source 
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
Download patch file Download diff file Expand all files Collapse all files

23
include/linux/blkdev.h
View file

@ -832,13 +832,30 @@ static inline void blk_run_address_space(struct address_space *mapping)
extern void blkdev_dequeue_request(struct request *req);
/*
* blk_end_request() takes bytes instead of sectors as a complete size.
* blk_rq_bytes() returns bytes left to complete in the entire request.
* blk_rq_cur_bytes() returns bytes left to complete in the current segment.
* blk_rq_pos() : the current sector
* blk_rq_bytes() : bytes left in the entire request
* blk_rq_cur_bytes() : bytes left in the current segment
* blk_rq_sectors() : sectors left in the entire request
* blk_rq_cur_sectors() : sectors left in the current segment
*/
static inline sector_t blk_rq_pos(const struct request *rq)
{
return rq->hard_sector;
}
extern unsigned int blk_rq_bytes(struct request *rq);
extern unsigned int blk_rq_cur_bytes(struct request *rq);
static inline unsigned int blk_rq_sectors(const struct request *rq)
{
return rq->hard_nr_sectors;
}
static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
{
return rq->hard_cur_sectors;
}
/*
* Request completion related functions.
*