1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 8b303477c77b..d255997bf635 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3463,6 +3463,11 @@ static struct kobject *md_probe(dev_t dev, int *part, void *data)
         disk->fops = &md_fops;
         disk->private_data = mddev;
         disk->queue = mddev->queue;
+        /* Allow extended partitions.  This makes the
+         * 'mdp' device redundant, but we can really
+         * remove it now.
+         */
+        disk->flags |= GENHD_FL_EXT_DEVT;
         add_disk(disk);
         mddev->gendisk = disk;
         error = kobject_init_and_add(&mddev->kobj, &md_ktype,