linux-kernel - Re: Splicing to/from a tty

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Message-ID: <CAHk-=wga4M_VLcfkBL0mK-1_mJHYKDzPA48jEOCBgME=nE4O6Q@mail.gmail.com>
Date:   Mon, 18 Jan 2021 13:35:15 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Oliver Giles <ohw.giles@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: Splicing to/from a tty

On Mon, Jan 18, 2021 at 12:24 PM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> Anybody want to play with this? I'd suggest keeping that "dummy"
> parameter around for a while - I did an allmodconfig build with this,
> but if there are any architecture-specific non-x86-64 cases I wouldn't
> have seen them.

Not architecture-specific, but I did find by some grepping that I
missed one line discipline driver: the Siemens R3964.

The reason I missed that is because it's been marked BROKEN in the
Kconfig for almost two years, so it didn't show up in my allmodconfig
coverage.

But the fact that I found it makes me a bit happier about my patch
actually covering all the cases.

My grep exercise failed on the bluetooth hci_ldisc.c pattern, which I
feel is because the bluetooth code used the wrong pattern to
initialize the 'struct tty_ldisc_ops', so I fixed that up too.

So here's a slightly updated version of that patch, but apart from
slightly better coverage - even if it's a driver that is disabled
anyway - I'd like to point out that all my previous caveats still
apply.

          Linus

Download attachment "patch" of type "application/octet-stream" (13324 bytes)