linux-kernel - Re: [PATCH RFC] gcc-plugins: Handle GCC version mismatch for OOT modules

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Message-ID: <20210128142952.GA2041496@infradead.org>
Date:   Thu, 28 Jan 2021 14:29:52 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-hardening@...r.kernel.org, linux-kbuild@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Justin Forbes <jforbes@...hat.com>,
        Ondrej Mosnacek <omosnace@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH RFC] gcc-plugins: Handle GCC version mismatch for OOT
 modules

On Wed, Jan 27, 2021 at 12:51:13PM -0600, Josh Poimboeuf wrote:
> Is this a joke?  I've never met anybody who builds OOT modules as a
> development aid...

I'm pretty sure you've met me before.

> On the other hand I know of several very popular distros (some paid,
> some not) who rely on allowing users/partners to build OOT modules as
> part of their ecosystem.  To say it's not supported is a farce.

This is not a farce.  The kernel only supports infrastructure for the
kernel itself, not for any external consumers.  If you have a business
model that relies on something else you should think hard if you are in
the right business.