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Date:   Thu, 27 May 2021 12:56:46 +0100
From:   Will Deacon <will@kernel.org>
To:     Xin Hao <xhao@linux.alibaba.com>
Cc:     fweisbec@gmail.com, john.stultz@linaro.org,
        kernel-team@android.com, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, lorenzo@google.com, maz@kernel.org,
        mika.penttila@nextfour.com, sboyd@kernel.org, tglx@linutronix.de
Subject: Re: [PATCH v2 2/5] tick/broadcast: Split
 __tick_broadcast_oneshot_control() into a helper
Message-ID: <20210527115646.GD22019@willie-the-truck>
References: <20210524221818.15850-3-will@kernel.org>
 <c3573cd8-a4c8-43c2-be66-8b74d688a406@linux.alibaba.com>
 <20210527082219.GA21311@willie-the-truck>
 <e0f6523f-36f8-188c-da99-4dcb51375522@linux.alibaba.com>
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On Thu, May 27, 2021 at 07:35:03PM +0800, Xin Hao wrote:
> 
> 在 2021/5/27 下午4:22, Will Deacon 写道:
> > On Thu, May 27, 2021 at 03:23:06PM +0800, Xin Hao wrote:
> > >       I  had backport you  tick/broadcast: Prefer per-cpu relatives patches,
> > > 
> > > but i did not get the true result,  the Wakeup Devices are all null, why?
> > Probably because you don't have any suitable per-cpu timers to act as a
> > wakeup. Do you have a per-cpu timer registered with CLOCK_EVT_FEAT_PERCPU
> 
> Yes, you are right, but i want to know why the timer do not support 
> CLOCK_EVT_FEAT_PERCPU.

I defer to Thomas on this one. The approach I have taken here (of printing
<NULL>) follows what is done elsewhere for the timer readout and probably
helps with parsing this stuff.

Will