block: move policy from disk to part0

Move disk->policy to part0->policy.  Implement and use get_disk_ro().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 9cb8380cf0eb..4411bdd671dd 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -145,7 +145,6 @@ struct gendisk {
         struct kobject *slave_dir;
 
         struct timer_rand_state *random;
-        int policy;
 
         atomic_t sync_io;               /* RAID */
         unsigned long stamp;
@@ -403,6 +402,11 @@ extern struct block_device *bdget_disk(struct gendisk *disk, int partno);
 extern void set_device_ro(struct block_device *bdev, int flag);
 extern void set_disk_ro(struct gendisk *disk, int flag);
 
+static inline int get_disk_ro(struct gendisk *disk)
+{
+        return disk->part0.policy;
+}
+
 /* drivers/char/random.c */
 extern void add_disk_randomness(struct gendisk *disk);
 extern void rand_initialize_disk(struct gendisk *disk);