From 283e7ad0241155710f99a9f39d13313a53336926 Mon Sep 17 00:00:00 2001
From: Dan Ehrenberg <dehrenberg@chromium.org>
Date: Tue, 10 Feb 2015 15:20:50 -0800
Subject: [PATCH] init: stricter checking of major:minor root= values

In the kernel command-line, previously, root=1:2jakshflaksjdhfa would
be accepted and interpreted just like root=1:2. This patch adds
stricter checking so that additional characters after major:minor are
rejected by root=.

The goal of this change is to help in unifying DM's interpretation of
its block device argument by using existing kernel code (name_to_dev_t).
But DM rejects malformed major:minor pairs, it seems reasonable for
root= to reject them as well.

Signed-off-by: Dan Ehrenberg <dehrenberg@chromium.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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