linux-kernel - Re: [PATCH v2 1/2] pidfd: add P

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Message-ID: <20190727194217.izpetvy5fz4dqj7q@brauner.io>
Date:   Sat, 27 Jul 2019 21:42:17 +0200
From:   Christian Brauner <christian@...uner.io>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        Oleg Nesterov <oleg@...hat.com>, Arnd Bergmann <arnd@...db.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Kees Cook <keescook@...omium.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Tejun Heo <tj@...nel.org>, David Howells <dhowells@...hat.com>,
        Jann Horn <jannh@...gle.com>,
        Andrew Lutomirski <luto@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Aleksa Sarai <cyphar@...har.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Android Kernel Team <kernel-team@...roid.com>
Subject: Re: [PATCH v2 1/2] pidfd: add P_PIDFD to waitid()

On Sat, Jul 27, 2019 at 09:41:25AM -0700, Linus Torvalds wrote:
> On Sat, Jul 27, 2019 at 9:28 AM Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > Something like
> >
> >   struct pid *fd_to_pid(unsigned int fd)
> >   {
> >         struct fd f;
> >         struct pid *pid;
> ...
> 
> I forgot to put my usual disclaimer about TOTALLY UNTESTED GARBAGE in
> that email. I want to make that part clear: that code snippet was
> meant as a rough guide of direction, not as a "this works".
> 
> Hopefully that was clear.

Yeah. I don't take code someone else has written without verifying or
testing into my own code. And I hope people do the same with mine. :)

Christian