/etc/mtab

I'm a little confused about /etc/mtab in
the lsbsi.

As currently constituted, the lsbsi-intermediate
receives a symlink from /proc/mounts to /etc/mtab,
but the lsbsi final does not.

In fact, there is no /etc/mtab in the actual
lsbsi before it has been run.  I suspect this
is the reason for a first-time error in booting
the uml lsbsi, as when it tries to access mtab
first it's on a read-only filesystem. 

So I might just want to make sure the symlink
is also created in the lsbsi final.

My confusion is that none of the distros I've
looked at use such a symlink; /etc/mtab is a
plain file and doesn't show exactly the same
contents as "cat /proc/self/mounts".