Re: [PATCH 1/2] Introduce tty_unregister_ldisc()

From: Greg KH
Date: Tue May 31 2005 - 23:30:39 EST


On Tue, May 31, 2005 at 05:28:11PM -0500, Paul Fulghum wrote:
> This patch is wrong. Please do not apply.
>
> An unmodified ldisc driver (externally maintained) will continue to call
> tty_register_ldisc with NULL, but the new behavior will be to set the
> ldisc pointer to NULL but have LDISC_FLAG_DEFINED set.

Then fix that code. We can not do anything about externally maintained
code, sorry.

> If you feel it is absolutely necessary to add this new function
> for cosmetic reasons, then leave the old behavior in place
> and make tty_unregister_ldisc a wrapper to tty_register_ldisc
> that uses a NULL pointer.
>
> This preserves sanity and compatibility.

We don't care about compatibility in order to keep our sanity. See
Documentation/stable_api_nonsense.txt for details :)

thanks,

greg k-h
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