>> interface; the write routine finds the pointer in the softc,
>> uiomove()s the data into the buffer, and kicks the receiving
>> process.

> Does uiomove() actually work if uio_porpc != curproc?

I don't know, but it doesn't matter, because when uiomove is called,
the only link to any process that's not then current is that the
(kernel-space) buffer being moved into was allocated in another
process's kernel stack.

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