[PATCH 5/7] dm/md dependency tree in sysfs: md to use bd_claim_by_disk

["Jun'ichi Nomura" <j-nomura@ce.jp.nec.com>]

This patch is part of dm/md dependency tree in sysfs.

Following symlinks are created if md0 is built from sda and sdb
  /sys/block/md0/slaves/sda --> /sys/block/sda
  /sys/block/md0/slaves/sdb --> /sys/block/sdb
  /sys/block/sda/holders/md0 --> /sys/block/md0
  /sys/block/sdb/holders/md0 --> /sys/block/md0

Thanks,
-- 
Jun'ichi Nomura, NEC Solutions (America), Inc.

Use bd_claim_by_disk.

Following symlinks are created if md0 is built from sda and sdb
  /sys/block/md0/slaves/sda --> /sys/block/sda
  /sys/block/md0/slaves/sdb --> /sys/block/sdb
  /sys/block/sda/holders/md0 --> /sys/block/md0
  /sys/block/sdb/holders/md0 --> /sys/block/md0

Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>

 drivers/md/md.c |    2 ++
 1 files changed, 2 insertions(+)

--- linux-2.6.16-rc6.orig/drivers/md/md.c	2006-03-11 17:12:55.000000000 -0500
+++ linux-2.6.16-rc6/drivers/md/md.c	2006-03-13 11:24:00.000000000 -0500
@@ -1298,6 +1298,7 @@ static int bind_rdev_to_array(mdk_rdev_t
 	else
 		ko = &rdev->bdev->bd_disk->kobj;
 	sysfs_create_link(&rdev->kobj, ko, "block");
+	bd_claim_by_disk(rdev->bdev, rdev, mddev->gendisk);
 	return 0;
 }
 
@@ -1308,6 +1309,7 @@ static void unbind_rdev_from_array(mdk_r
 		MD_BUG();
 		return;
 	}
+	bd_release_from_disk(rdev->bdev, rdev->mddev->gendisk);
 	list_del_init(&rdev->same_set);
 	printk(KERN_INFO "md: unbind<%s>\n", bdevname(rdev->bdev,b));
 	rdev->mddev = NULL;