Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Tue, 8 Oct 2019 16:16:42 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Valentin Schneider <valentin.schneider@arm.com>
Cc:     Vincent Guittot <vincent.guittot@linaro.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@redhat.com>, Phil Auld <pauld@redhat.com>,
        Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
        Quentin Perret <quentin.perret@arm.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>,
        Morten Rasmussen <Morten.Rasmussen@arm.com>,
        Hillf Danton <hdanton@sina.com>
Subject: Re: [PATCH v3 04/10] sched/fair: rework load_balance
Message-ID: <20191008141642.GQ2294@hirez.programming.kicks-ass.net>
References: <1568878421-12301-1-git-send-email-vincent.guittot@linaro.org>
 <1568878421-12301-5-git-send-email-vincent.guittot@linaro.org>
 <c752dd1a-731e-aae3-6a2c-aecf88901ac0@arm.com>
 <CAKfTPtBQNJfNmBqpuaefsLzsTrGxJ=2bTs+tRdbOAa9J3eKuVw@mail.gmail.com>
 <31cac0c1-98e4-c70e-e156-51a70813beff@arm.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <31cac0c1-98e4-c70e-e156-51a70813beff@arm.com>
User-Agent: Mutt/1.10.1 (2018-07-13)
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Wed, Oct 02, 2019 at 11:47:59AM +0100, Valentin Schneider wrote:

> Yeah, right shift on signed negative values are implementation defined.

Seriously? Even under -fno-strict-overflow? There is a perfectly
sensible operation for signed shift right, this stuff should not be
undefined.