drbd: Allow to create devices with a minor number > minor_count

The minor_count module/kernel parameter serves to scale the size of drbd's
internal memory pool, but it is no longer a limit for the number of minors or
the minor number.  (Minor numbers can be arbitrarily high within the allowed
limit of 2^20.)

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

drivers/block/drbd/drbd_nl.c

@@ -3034,8 +3034,7 @@ int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info)
 	if (retcode != NO_ERROR)
 		goto out;
 
-	/* FIXME drop minor_count parameter, limit to MINORMASK */
-	if (dh->minor >= minor_count) {
+	if (dh->minor > MINORMASK) {
 		drbd_msg_put_info("requested minor out of range");
 		retcode = ERR_INVALID_REQUEST;
 		goto out;