[PATCH] dm: make v4 of the ioctl interface the default

From: Joe Thornber <thornber@sistina.com>

Make the version-4 ioctl interface the default kernel configuration option.
If you have out of date tools you will need to use the v1 interface.

drivers/md/Kconfig

@@ -138,6 +138,7 @@ config BLK_DEV_DM
 config DM_IOCTL_V4
 	bool "ioctl interface version 4"
 	depends on BLK_DEV_DM
+	default y
 	---help---
 	  Recent tools use a new version of the ioctl interface, only
           select this option if you intend using such tools.