diff options
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 38 |
1 files changed, 30 insertions, 8 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index d3afea47ade6..c9cb12483e12 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -11,7 +11,6 @@ #include <linux/minmax.h> #include <linux/timer.h> #include <linux/workqueue.h> -#include <linux/backing-dev-defs.h> #include <linux/wait.h> #include <linux/mempool.h> #include <linux/pfn.h> @@ -398,8 +397,6 @@ struct request_queue { struct blk_mq_hw_ctx **queue_hw_ctx; unsigned int nr_hw_queues; - struct backing_dev_info *backing_dev_info; - /* * The queue owner gets to use this for whatever they like. * ll_rw_blk doesn't touch it. @@ -424,6 +421,8 @@ struct request_queue { spinlock_t queue_lock; + struct gendisk *disk; + /* * queue kobject */ @@ -664,8 +663,6 @@ extern void blk_clear_pm_only(struct request_queue *q); dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \ (dir), (attrs)) -#define queue_to_disk(q) (dev_to_disk(kobj_to_dev((q)->kobj.parent))) - static inline bool queue_is_mq(struct request_queue *q) { return q->mq_ops; @@ -941,6 +938,10 @@ static inline struct request_queue *bdev_get_queue(struct block_device *bdev) #define SECTOR_SIZE (1 << SECTOR_SHIFT) #endif +#define PAGE_SECTORS_SHIFT (PAGE_SHIFT - SECTOR_SHIFT) +#define PAGE_SECTORS (1 << PAGE_SECTORS_SHIFT) +#define SECTOR_MASK (PAGE_SECTORS - 1) + /* * blk_rq_pos() : the current sector * blk_rq_bytes() : bytes left in the entire request @@ -1139,7 +1140,7 @@ void blk_queue_zone_write_granularity(struct request_queue *q, unsigned int size); extern void blk_queue_alignment_offset(struct request_queue *q, unsigned int alignment); -void blk_queue_update_readahead(struct request_queue *q); +void disk_update_readahead(struct gendisk *disk); extern void blk_limits_io_min(struct queue_limits *limits, unsigned int min); extern void blk_queue_io_min(struct request_queue *q, unsigned int min); extern void blk_limits_io_opt(struct queue_limits *limits, unsigned int opt); @@ -1521,6 +1522,22 @@ static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector return offset << SECTOR_SHIFT; } +/* + * Two cases of handling DISCARD merge: + * If max_discard_segments > 1, the driver takes every bio + * as a range and send them to controller together. The ranges + * needn't to be contiguous. + * Otherwise, the bios/requests will be handled as same as + * others which should be contiguous. + */ +static inline bool blk_discard_mergable(struct request *req) +{ + if (req_op(req) == REQ_OP_DISCARD && + queue_max_discard_segments(req->q) > 1) + return true; + return false; +} + static inline int bdev_discard_alignment(struct block_device *bdev) { struct request_queue *q = bdev_get_queue(bdev); @@ -1855,6 +1872,13 @@ struct block_device_operations { char *(*devnode)(struct gendisk *disk, umode_t *mode); struct module *owner; const struct pr_ops *pr_ops; + + /* + * Special callback for probing GPT entry at a given sector. + * Needed by Android devices, used by GPT scanner and MMC blk + * driver. + */ + int (*alternative_gpt_sector)(struct gendisk *disk, sector_t *sector); }; #ifdef CONFIG_COMPAT @@ -1984,8 +2008,6 @@ void blkdev_put_no_open(struct block_device *bdev); struct block_device *bdev_alloc(struct gendisk *disk, u8 partno); void bdev_add(struct block_device *bdev, dev_t dev); struct block_device *I_BDEV(struct inode *inode); -struct block_device *bdgrab(struct block_device *bdev); -void bdput(struct block_device *); int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart, loff_t lend); |