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From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 2 May 2024 18:12:12 -0700
Message-ID: <CAHk-=wh33VL0v-fymirrB+i4pyqQoK0==4j2FW0=mLW2B_kpsg@mail.gmail.com>
Subject: Re: [PATCH v3] tty: tty_io: remove hung_up_tty_fops
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Marco Elver <elver@google.com>, paulmck@kernel.org, 
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Dmitry Vyukov <dvyukov@google.com>, 
	syzbot <syzbot+b7c3ba8cdc2f6cf83c21@syzkaller.appspotmail.com>, 
	linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, 
	Nathan Chancellor <nathan@kernel.org>, Arnd Bergmann <arnd@kernel.org>, Al Viro <viro@zeniv.linux.org.uk>, 
	Jiri Slaby <jirislaby@kernel.org>
Content-Type: text/plain; charset="UTF-8"

On Thu, 2 May 2024 at 16:54, Tetsuo Handa
<penguin-kernel@i-love.sakura.ne.jp> wrote:
>
> debugfs (or maybe any filesystems that wraps f_op) caches filp->f_op into
> private data

That's just for debugfs uses. If you somehow try to do that on a tty,
you are quite welcome to keep both broken pieces.

               Linus