Anyone maintaining Mux?

Ryan's listed as the MODULE_AUTHOR for Mux, but I haven't seen anything from him since he changed jobs.

I recently did an allmodconfig build and I'm looking at the missing symbols. A modular Mux looks for:

WARNING: "pdc_iodc_putc" [drivers/serial/mux.ko] undefined!

That's funny (mostly in the sense of odd, with a tinge of amusing) because mux is supposed to be an output driver ... why's it calling pdc to write bytes for it?

Turns out, that's in mux_console_write() -- ie only used if CONFIG_SERIAL_MUX_CONSOLE is set. It's an exact duplicate of the code in pdc_cons.c.

We have five options that I see for solving this:

1. Make CONFIG_SERIAL_MUX a bool. No more mux-as-module.

2. Make CONFIG_SERIAL_MUX_CONSOLE only available if CONFIG_SERIAL_MUX is y.

3. Export pdc_iodc_putc. What's one more symbol between friends?

4. Delete CONFIG_SERIAL_MUX_CONSOLE and make pdc console work right.

5. Rewrite the Mux console to actually use the mux rather than PDC.

I'd like somebody else to be enthusiastic enough to do #5, but I'm concerned that we don't really have a maintainer for this code right now, and nobody's going to have time/inclination to do it.

BTW, owning this hardware is not required to work on this driver -- we have a K-class with remote power in the Fort Collins test-ring.
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