[syslinux] mount USB squashFS

[slash woot]

Hi everyone,

I have used syslinux to create a bootable USB with my OS on it, but
I have one issue to untangle.

When the usb drive boots, it fails to perform a switch root to
squash-filesystem on the usb. This is because it is not mounting
the usb, and thus also not able to mount the squashFS image.

If I search around I can figure out which device is my usb and
switch-root it manually. But it would be great if this were
automatic.

My configuration for this project can be found here:
https://github.com/PhysixProject/physix-on-usb

Seeking advice. Thank you in advance.
Tree