linux-kernel - Re: [v3 PATCH 1/8] RISC-V: Do not wait indefinitely in __cpu

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Message-ID: <20190208090139.GA16932@infradead.org>
Date:   Fri, 8 Feb 2019 01:01:39 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Atish Patra <atish.patra@....com>
Cc:     linux-riscv@...ts.infradead.org,
        Patrick Stählin <me@...ki.ch>,
        Albert Ou <aou@...s.berkeley.edu>,
        Damien Le Moal <Damien.LeMoal@....com>,
        Jason Cooper <jason@...edaemon.net>,
        Alan Kao <alankao@...estech.com>,
        Dmitriy Cherkasov <dmitriy@...-tech.org>,
        Anup Patel <anup@...infault.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        linux-kernel@...r.kernel.org, Zong Li <zongbox@...il.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Andreas Schwab <schwab@...e.de>,
        Marc Zyngier <marc.zyngier@....com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [v3 PATCH 1/8] RISC-V: Do not wait indefinitely in __cpu_up

On Thu, Feb 07, 2019 at 05:51:14PM -0800, Atish Patra wrote:
> In SMP path, __cpu_up waits for other CPU to come online
> indefinitely. This is wrong as other CPU might be disabled
> in machine mode and possible CPU is set to the cpus present
> in DT.
> 
> Introduce a completion variable and waits only for a second.
> 
> Signed-off-by: Atish Patra <atish.patra@....com>
> Reviewed-by: Anup Patel <anup@...infault.org>

Looks good,

Reviewed-by: Christoph Hellwig <hch@....de>