Given device ID rather than s_id in "id" sysfs file
From: Bob Peterson <firstname.lastname@example.org>
This patch changes the /sys/fs/gfs2/<s_id>/id file to give the device
id "major:minor" rather than the s_id. That enables gfs2_tool to
match devices properly (by id, not name) when locating the tuning files.
Signed-off-by: Bob Peterson <email@example.com>
Signed-off-by: Steven Whitehouse <firstname.lastname@example.org>