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From:   Qian Cai <cai@lca.pw>
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Subject: Re: [PATCH] READ_ONCE, WRITE_ONCE, kcsan: Perform checks in __*_ONCE variants
Date:   Tue, 19 May 2020 22:28:41 -0400
Message-Id: <360AFD09-27EC-4133-A5E3-149B8C0C4232@lca.pw>
References: <87y2pn60ob.fsf@nanos.tec.linutronix.de>
Cc:     Marco Elver <elver@google.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        kasan-dev <kasan-dev@googlegroups.com>,
        Will Deacon <will@kernel.org>,
        "Paul E . McKenney" <paulmck@kernel.org>,
        Ingo Molnar <mingo@kernel.org>
In-Reply-To: <87y2pn60ob.fsf@nanos.tec.linutronix.de>
To:     Thomas Gleixner <tglx@linutronix.de>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


> On May 19, 2020, at 6:05 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
>=20
> Yes, it's unfortunate, but we have to stop making major concessions just
> because tools are not up to the task.
>=20
> We've done that way too much in the past and this particular problem
> clearly demonstrates that there are limits.
>=20
> Making brand new technology depend on sane tools is not asked too
> much. And yes, it's inconvenient, but all of us have to build tools
> every now and then to get our job done. It's not the end of the world.
>=20
> Building clang is trivial enough and pointing the make to the right
> compiler is not rocket science either.

Yes, it all make sense from that angle. On the other hand, I want to be focu=
s on kernel rather than compilers by using a stable and rocket-solid version=
. Not mentioned the time lost by compiling and properly manage my own toolch=
ain in an automated environment, using such new version of compilers means t=
hat I have to inevitably deal with compiler bugs occasionally. Anyway, it is=
 just some other more bugs I have to deal with, and I don=E2=80=99t have a b=
etter solution to offer right now.=