block: remove ->driverfs_dev

Now that all drivers that specify a ->driverfs_dev have been converted
to device_add_disk(), the pointer can be removed from struct gendisk.

Cc: Jens Axboe <axboe@fb.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/block/genhd.c b/block/genhd.c
index fb2d9aeb75a5..a18d35390f1d 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -618,10 +618,6 @@ void device_add_disk(struct device *parent, struct gendisk *disk)
 
         blk_register_region(disk_devt(disk), disk->minors, NULL,
                             exact_match, exact_lock, disk);
-
-        /* temporary while we convert usages to use disk_to_dev(disk)->parent */
-        disk->driverfs_dev = parent;
-
         register_disk(parent, disk);
         blk_register_queue(disk);
 
@@ -804,10 +800,9 @@ void __init printk_all_partitions(void)
                                , disk_name(disk, part->partno, name_buf),
                                part->info ? part->info->uuid : "");
                         if (is_part0) {
-                                if (disk->driverfs_dev != NULL &&
-                                    disk->driverfs_dev->driver != NULL)
+                                if (dev->parent && dev->parent->driver)
                                         printk(" driver: %s\n",
-                                              disk->driverfs_dev->driver->name);
+                                              dev->parent->driver->name);
                                 else
                                         printk(" (driver?)\n");
                         } else