block: Introduce helper to reset queue limits to default values

[safe/jmp/linux-2.6] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 5e740a1..8963d91 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -765,6 +765,11 @@ extern void blk_insert_request(struct request_queue *, struct request *, int, vo
 extern void blk_requeue_request(struct request_queue *, struct request *);
 extern int blk_rq_check_limits(struct request_queue *q, struct request *rq);
 extern int blk_lld_busy(struct request_queue *q);
+extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
+                            struct bio_set *bs, gfp_t gfp_mask,
+                            int (*bio_ctr)(struct bio *, struct bio *, void *),
+                            void *data);
+extern void blk_rq_unprep_clone(struct request *rq);
 extern int blk_insert_cloned_request(struct request_queue *q,
                                     struct request *rq);
 extern void blk_plug_device(struct request_queue *);
@@ -921,6 +926,7 @@ extern void blk_queue_alignment_offset(struct request_queue *q,
                                       unsigned int alignment);
 extern void blk_queue_io_min(struct request_queue *q, unsigned int min);
 extern void blk_queue_io_opt(struct request_queue *q, unsigned int opt);
+extern void blk_set_default_limits(struct queue_limits *lim);
 extern int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
                            sector_t offset);
 extern void disk_stack_limits(struct gendisk *disk, struct block_device *bdev,
@@ -1221,6 +1227,8 @@ struct block_device_operations {
        int (*direct_access) (struct block_device *, sector_t,
                                                void **, unsigned long *);
        int (*media_changed) (struct gendisk *);
+       unsigned long long (*set_capacity) (struct gendisk *,
+                                               unsigned long long);
        int (*revalidate_disk) (struct gendisk *);
        int (*getgeo)(struct block_device *, struct hd_geometry *);
        struct module *owner;