Thanks, Jason.
I am new to linux kernel. I'll have the main
application run from init(), so I wasn't planning
to have a file system.

Yes. You will always have SOME kind of filesystem.
But this begs another
question. How much do you know about Linux, and what
are you really asking?

If /proc and /dev is not really on any disk, what do
I have to do to init or create /dev? Do I need ramdisk
as a minumum requirement for linux?
My main goal right now is to get the serial port
to work, so I can do some debugging with the dumb
terminal. After I do tty_register() in the serial
driver, does linux assign /dev/ttyS to this device?

The /proc filesystem is not really on any disk, just
like /dev (I think)
isn't on any disk, though they look like to us users
that they are
filesystems.

Can you give me pointers on which file to read?

Does this help?

Yes. Thank you very much. :)


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