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| author | Tejun Heo <tj@kernel.org> | 2008-08-25 19:56:05 +0900 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:07 +0200 |
| commit | ed9e1982347b36573cd622ee5f4e2a7ccd79b3fd (patch) | |
| tree | 79d834094d655ec97cfc0a382a9207ebc8e711a5 /include/linux/genhd.h | |
| parent | 870d6656126add8e383645732b03df2b7ccd4f94 (diff) | |
| download | lwn-ed9e1982347b36573cd622ee5f4e2a7ccd79b3fd.tar.gz lwn-ed9e1982347b36573cd622ee5f4e2a7ccd79b3fd.zip | |
block: implement and use {disk|part}_to_dev()
Implement {disk|part}_to_dev() and use them to access generic device
instead of directly dereferencing {disk|part}->dev. To make sure no
user is left behind, rename generic devices fields to __dev.
This is in preparation of unifying partition 0 handling with other
partitions.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include/linux/genhd.h')
| -rw-r--r-- | include/linux/genhd.h | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 6fc532424062..e4e18c509ac5 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -15,9 +15,11 @@ #ifdef CONFIG_BLOCK -#define kobj_to_dev(k) container_of(k, struct device, kobj) -#define dev_to_disk(device) container_of(device, struct gendisk, dev) -#define dev_to_part(device) container_of(device, struct hd_struct, dev) +#define kobj_to_dev(k) container_of((k), struct device, kobj) +#define dev_to_disk(device) container_of((device), struct gendisk, __dev) +#define dev_to_part(device) container_of((device), struct hd_struct, __dev) +#define disk_to_dev(disk) (&((disk)->__dev)) +#define part_to_dev(part) (&((part)->__dev)) extern struct device_type part_type; extern struct kobject *block_depr; @@ -88,7 +90,7 @@ struct disk_stats { struct hd_struct { sector_t start_sect; sector_t nr_sects; - struct device dev; + struct device __dev; struct kobject *holder_dir; int policy, partno; #ifdef CONFIG_FAIL_MAKE_REQUEST @@ -139,7 +141,7 @@ struct gendisk { int flags; struct device *driverfs_dev; // FIXME: remove - struct device dev; + struct device __dev; struct kobject *holder_dir; struct kobject *slave_dir; @@ -163,7 +165,7 @@ struct gendisk { static inline struct gendisk *part_to_disk(struct hd_struct *part) { if (likely(part)) - return dev_to_disk((part)->dev.parent); + return dev_to_disk(part_to_dev(part)->parent); return NULL; } @@ -174,12 +176,12 @@ static inline int disk_max_parts(struct gendisk *disk) static inline dev_t disk_devt(struct gendisk *disk) { - return disk->dev.devt; + return disk_to_dev(disk)->devt; } static inline dev_t part_devt(struct hd_struct *part) { - return part->dev.devt; + return part_to_dev(part)->devt; } extern struct hd_struct *disk_get_part(struct gendisk *disk, int partno); @@ -187,7 +189,7 @@ extern struct hd_struct *disk_get_part(struct gendisk *disk, int partno); static inline void disk_put_part(struct hd_struct *part) { if (likely(part)) - put_device(&part->dev); + put_device(part_to_dev(part)); } /* |