[PATCH] bdev->bd_disk introduced

There we go - now we can put a reference to gendisk into block_device.  Which
we do in do_open().  Most of the callers of get_gendisk() are simply using
bdev->bd_disk now (and most of the put_disk() calls introduced on previous
step disappear).  We also put that pointer into struct request - ->rq_disk.
That allows to get rid of disk_index() kludges in md.c (we simply count
relevant IO in the struct gendisk fields) and kill the export of get_gendisk().
	Notice that by now we can move _all_ IO counters into gendisk.  That
will kill a bunch of per-major arrays and more importantly, allow to merge
sard in clean way.  FWIW, we probably could show them as disk/partitions
attributes in driverfs...

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 607641c6cfb1..ccb56d58de6a 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -34,6 +34,7 @@ struct request {
 
 	int rq_status;	/* should split this into a few status bits */
 	kdev_t rq_dev;
+	struct gendisk *rq_disk;
 	int errors;
 	sector_t sector;
 	unsigned long nr_sectors;