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Merge branch 'for-2.6.19' of git://brick.kernel.dk/data/git/linux-2.6-block 

* 'for-2.6.19' of git://brick.kernel.dk/data/git/linux-2.6-block:
  [PATCH] Document bi_sector and sector_t
  [PATCH] helper function for retrieving scsi_cmd given host based block layer tag
This commit is contained in:
Linus Torvalds 2006-10-04 10:44:01 -07:00
parent 5170065d8a 2c2345c2b4
commit cc94dcf5f2
5 changed files with 36 additions and 8 deletions
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7
block/ll_rw_blk.c
View File

@ -840,12 +840,7 @@ EXPORT_SYMBOL(blk_queue_dma_alignment);
**/
struct request *blk_queue_find_tag(request_queue_t *q, int tag)
{
struct blk_queue_tag *bqt = q->queue_tags;
if (unlikely(bqt == NULL || tag >= bqt->real_max_depth))
return NULL;
return bqt->tag_index[tag];
return blk_map_queue_find_tag(q->queue_tags, tag);
}
EXPORT_SYMBOL(blk_queue_find_tag);

3
include/linux/bio.h
View File

@ -70,7 +70,8 @@ typedef void (bio_destructor_t) (struct bio *);
* stacking drivers)
*/
struct bio {
sector_t bi_sector;
sector_t bi_sector; /* device address in 512 byte
sectors */
struct bio *bi_next; /* request queue link */
struct block_device *bi_bdev;
unsigned long bi_flags; /* status, command, etc */

8
include/linux/blkdev.h
View File

@ -769,6 +769,14 @@ extern struct blk_queue_tag *blk_init_tags(int);
extern void blk_free_tags(struct blk_queue_tag *);
extern void blk_congestion_end(int rw);
static inline struct request *blk_map_queue_find_tag(struct blk_queue_tag *bqt,
int tag)
{
if (unlikely(bqt == NULL || tag >= bqt->real_max_depth))
return NULL;
return bqt->tag_index[tag];
}
extern void blk_rq_bio_prep(request_queue_t *, struct request *, struct bio *);
extern int blkdev_issue_flush(struct block_device *, sector_t *);

6
include/linux/types.h
View File

@ -129,8 +129,12 @@ typedef __s64 int64_t;
/* this is a special 64bit data type that is 8-byte aligned */
#define aligned_u64 unsigned long long __attribute__((aligned(8)))
/*
/**
* The type used for indexing onto a disc or disc partition.
*
* Linux always considers sectors to be 512 bytes long independently
* of the devices real block size.
*
* If required, asm/types.h can override it and define
* HAVE_SECTOR_T
*/

20
include/scsi/scsi_tcq.h
View File

@ -144,5 +144,25 @@ static inline int scsi_init_shared_tag_map(struct Scsi_Host *shost, int depth)
return shost->bqt ? 0 : -ENOMEM;
}
/**
* scsi_host_find_tag - find the tagged command by host
* @shost: pointer to scsi_host
* @tag: tag of the scsi_cmnd
*
* Notes:
* Only works with tags allocated by the generic blk layer.
**/
static inline struct scsi_cmnd *scsi_host_find_tag(struct Scsi_Host *shost,
int tag)
{
struct request *req;
if (tag != SCSI_NO_TAG) {
req = blk_map_queue_find_tag(shost->bqt, tag);
return req ? (struct scsi_cmnd *)req->special : NULL;
}
return NULL;
}
#endif /* CONFIG_BLOCK */
#endif /* _SCSI_SCSI_TCQ_H */