Re: udev and devfs - The final word

viro
2004-01-02T00:36:58Z

On Thu, Jan 01, 2004 at 06:17:43PM -0600, Hollis Blanchard wrote:
> "console=" takes driver-supplied names which usually happen to match
> /dev node names. For example, drivers/serial/8250.c names itself
> "ttyS", so "console=ttyS0" will end up going to that driver, regardless
> of the state of /dev.
>
> I'm not saying that's good or bad, but what's the alternative?
> "console=class/tty/ttyS0"?

Console code will need serious work anyway; note that current names
do _not_ refer to tty devices - there is some overlap, but right now
we have
* console drivers
* some of them being connected with tty drivers; those can tell
which tty driver corresponds to them
* console ouput code maintaining chain of console drivers; output
is sent to them, attempt to open() /dev/console ends up picking the first
console driver that has corresponding tty one (== has console->device())
and opening the tty device in question
* unholy mess with redirects.

There's no device nodes for console drivers. So names in console=... are
something very odd, indeed.