linux-kernel - Re: [PATCH v4 2/2] cpufreq: make interface functions and lock holding state clear

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Message-ID: <20220513042925.42hvv26ejup6js3h@vireshk-i7>
Date:   Fri, 13 May 2022 09:59:25 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Schspa Shi <schspa@...il.com>
Cc:     rafael@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] cpufreq: make interface functions and lock
 holding state clear

On 12-05-22, 21:52, Schspa Shi wrote:
> cpufreq_offline() calls offline() and exit() under the policy rwsem
> But they are called outside the rwsem in cpufreq_online().
> 
> This patch move the offline(), exit(), online(), init() to be inside
> of policy rwsem to achieve a clear lock relationship.
> 
> All the init() online() implement only initialize policy object without
> holding this lock and won't call cpufreq APIs need to hold this lock.
> 
> Signed-off-by: Schspa Shi <schspa@...il.com>
> ---
>  drivers/cpufreq/cpufreq.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh