From: NeilBrown <neilb@suse.de>
Date: Mon, 29 Mar 2010 00:18:15 +0000 (+1100)
Subject: md: remove ->changed and related code.
X-Git-Tag: v2.6.35-rc1~440^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b821eaa5;p=pandora-kernel.git

md: remove ->changed and related code.

We set ->changed to 1 and call check_disk_change at the end
of md_open so that bd_invalidated would be set and thus
partition rescan would happen appropriately.

Now that we call revalidate_disk directly, which sets bd_invalidates,
that indirection is no longer needed and can be removed.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 69f2a8e6ccdf..f2b30019b1cb 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4501,7 +4501,6 @@ static int do_md_run(mddev_t * mddev)
 	md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
 
 	revalidate_disk(mddev->gendisk);
-	mddev->changed = 1;
 	md_new_event(mddev);
 	sysfs_notify_dirent(mddev->sysfs_state);
 	if (mddev->sysfs_action)
@@ -4620,7 +4619,7 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
 				}
 
 			set_capacity(disk, 0);
-			mddev->changed = 1;
+			revalidate_disk(disk);
 
 			if (mddev->ro)
 				mddev->ro = 0;
@@ -4686,7 +4685,6 @@ out:
 		mddev->sync_speed_min = mddev->sync_speed_max = 0;
 		mddev->recovery = 0;
 		mddev->in_sync = 0;
-		mddev->changed = 0;
 		mddev->degraded = 0;
 		mddev->barriers_work = 0;
 		mddev->safemode = 0;
@@ -5850,7 +5848,6 @@ static int md_open(struct block_device *bdev, fmode_t mode)
 	atomic_inc(&mddev->openers);
 	mutex_unlock(&mddev->open_mutex);
 
-	check_disk_change(bdev);
  out:
 	return err;
 }
@@ -5865,21 +5862,6 @@ static int md_release(struct gendisk *disk, fmode_t mode)
 
 	return 0;
 }
-
-static int md_media_changed(struct gendisk *disk)
-{
-	mddev_t *mddev = disk->private_data;
-
-	return mddev->changed;
-}
-
-static int md_revalidate(struct gendisk *disk)
-{
-	mddev_t *mddev = disk->private_data;
-
-	mddev->changed = 0;
-	return 0;
-}
 static const struct block_device_operations md_fops =
 {
 	.owner		= THIS_MODULE,
@@ -5890,8 +5872,6 @@ static const struct block_device_operations md_fops =
 	.compat_ioctl	= md_compat_ioctl,
 #endif
 	.getgeo		= md_getgeo,
-	.media_changed	= md_media_changed,
-	.revalidate_disk= md_revalidate,
 };
 
 static int md_thread(void * arg)
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