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From: Phil Blundell <pb@pbcl.net>
To: Chunrong Guo <B40290@freescale.com>
Date: Wed, 31 Jul 2013 10:57:37 +0100
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Subject: Re: [PATCH] base-files: remove symbolic link from /etc/mtab to /proc/mounts
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On Wed, 2013-07-31 at 16:19 +0800, Chunrong Guo wrote:
>     *If /etc/mtab is a symlink to /proc/self/mounts,
>      mounting fails because addmntent returns an error.
>      As a consequence, the Private directory is unusable
>      because /proc/self/mounts is read-only feature.

This looks like it will break anything with a READ_ONLY_ROOTFS since now
mtab won't exist and there will be no way for it to get created.  

I'm not quite sure I understand what problem you're trying to fix (since
I can't immediately think of any situation where calling addmntent() is
a sensible thing to do) but, whatever the problem is, I don't think that
unilaterally removing /etc/mtab is a good way to go about fixing it.

p.