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>
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 6fc5324..e4e18c5 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 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 @@
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 @@
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 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 @@
static inline void disk_put_part(struct hd_struct *part)
{
if (likely(part))
- put_device(&part->dev);
+ put_device(part_to_dev(part));
}
/*