linux-kernel - Re: [v2 PATCH 1/4] powernv: Move CPU-Offline idle state invocation from smp.c to idle.c

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Message-ID: <20170321023517.4cb27add@roar.ozlabs.ibm.com>
Date:   Tue, 21 Mar 2017 02:35:17 +1000
From:   Nicholas Piggin <npiggin@...il.com>
To:     "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
Cc:     Michael Ellerman <mpe@...erman.id.au>,
        Michael Neuling <mikey@...ling.org>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        "Shreyas B. Prabhu" <shreyasbp@...il.com>,
        Shilpasri G Bhat <shilpa.bhat@...ux.vnet.ibm.com>,
        Vaidyanathan Srinivasan <svaidy@...ux.vnet.ibm.com>,
        Anton Blanchard <anton@...ba.org>,
        Balbir Singh <bsingharora@...il.com>,
        Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [v2 PATCH 1/4] powernv: Move CPU-Offline idle state invocation
 from smp.c to idle.c

On Mon, 20 Mar 2017 21:24:15 +0530
"Gautham R. Shenoy" <ego@...ux.vnet.ibm.com> wrote:

> From: "Gautham R. Shenoy" <ego@...ux.vnet.ibm.com>
> 
> Move the piece of code in powernv/smp.c::pnv_smp_cpu_kill_self() which
> transitions the CPU to the deepest available platform idle state to a
> new function named pnv_cpu_offline() in powernv/idle.c. The rationale
> behind this code movement is that the data required to determine the
> deepest available platform state resides in powernv/idle.c.
> 
> Signed-off-by: Gautham R. Shenoy <ego@...ux.vnet.ibm.com>

Looks good. As a nitpick, possibly one or two variables in idle.c could
become static (pnv_deepest_stop_psscr_*).

Reviewed-by: Nicholas Piggin <npiggin@...il.com>