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block: gendisk integrity wrapper

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This is a wrapper for accessing a gendisk's integrity bits.  It allows
the integrity support in MD to be compiled with BLK_DEV_INTEGRITY off.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Martin K. Petersen 2008-10-02 18:47:49 +02:00 committed by Jens Axboe
parent ad7fce9314
commit b02739b01c
1 changed files with 6 additions and 0 deletions
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6
include/linux/blkdev.h
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@ -1022,6 +1022,11 @@ struct blk_integrity *bdev_get_integrity(struct block_device *bdev)
return bdev->bd_disk->integrity;
}
static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
{
return disk->integrity;
}
static inline int blk_integrity_rq(struct request *rq)
{
if (rq->bio == NULL)
@ -1036,6 +1041,7 @@ static inline int blk_integrity_rq(struct request *rq)
#define blk_rq_count_integrity_sg(a) (0)
#define blk_rq_map_integrity_sg(a, b) (0)
#define bdev_get_integrity(a) (0)
#define blk_get_integrity(a) (0)
#define blk_integrity_compare(a, b) (0)
#define blk_integrity_register(a, b) (0)
#define blk_integrity_unregister(a) do { } while (0);