diff options
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index fae138b..53002d4 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -41,6 +41,8 @@ struct elevator_queue; typedef struct elevator_queue elevator_t; struct request_pm_state; struct blk_trace; +struct request; +struct sg_io_hdr; #define BLKDEV_MIN_RQ 4 #define BLKDEV_MAX_RQ 128 /* Default maximum */ @@ -607,6 +609,11 @@ extern unsigned long blk_max_low_pfn, blk_max_pfn; #define BLK_BOUNCE_ANY ((u64)blk_max_pfn << PAGE_SHIFT) #define BLK_BOUNCE_ISA (ISA_DMA_THRESHOLD) +/* + * default timeout for SG_IO if none specified + */ +#define BLK_DEFAULT_SG_TIMEOUT (60 * HZ) + #ifdef CONFIG_MMU extern int init_emergency_isa_pool(void); extern void blk_queue_bounce(request_queue_t *q, struct bio **bio); @@ -680,6 +687,11 @@ extern int blk_execute_rq(request_queue_t *, struct gendisk *, struct request *, int); extern void blk_execute_rq_nowait(request_queue_t *, struct gendisk *, struct request *, int, rq_end_io_fn *); +extern int blk_fill_sghdr_rq(request_queue_t *, struct request *, + struct sg_io_hdr *, int); +extern int blk_unmap_sghdr_rq(struct request *, struct sg_io_hdr *); +extern int blk_complete_sghdr_rq(struct request *, struct sg_io_hdr *, + struct bio *); static inline request_queue_t *bdev_get_queue(struct block_device *bdev) { |