linux-kernel - Re: [PATCH] tty: Remove dead termiox code

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Date:   Thu, 3 Dec 2020 19:43:28 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Jann Horn <jannh@...gle.com>
Cc:     Jiri Slaby <jirislaby@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tty: Remove dead termiox code

On Thu, Dec 03, 2020 at 03:03:31AM +0100, Jann Horn wrote:
> set_termiox() and the TCGETX handler bail out with -EINVAL immediately
> if ->termiox is NULL, but there are no code paths that can set
> ->termiox to a non-NULL pointer; and no such code paths seem to have
> existed since the termiox mechanism was introduced back in
> commit 1d65b4a088de ("tty: Add termiox") in v2.6.28.
> Similarly, no driver actually implements .set_termiox; and it looks like
> no driver ever has.
> 
> Delete this dead code; but leave the definition of struct termiox in the
> UAPI headers intact.

Crazy that no one uses it.  Nice cleanup, thanks for doing this.

greg k-h