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>

1 files changed, 1 insertions, 21 deletions

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)