linux-kernel - Re: [PATCH] PM: EM: do not allow pd creation prior to debugfs initialization

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Message-ID: <e01188a0-1dc7-db57-309f-f49390216875@arm.com>
Date:   Tue, 19 Oct 2021 18:05:24 +0100
From:   Lukasz Luba <lukasz.luba@....com>
To:     Lingutla Chandrasekhar <clingutla@...eaurora.org>
Cc:     rafael.j.wysocki@...el.com, qperret@...gle.com,
        daniel.lezcano@...aro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] PM: EM: do not allow pd creation prior to debugfs
 initialization

On 10/19/21 4:28 PM, Lingutla Chandrasekhar wrote:
> em_dev_register_perf_domain() can be called from any initcall level before

The EM is registered by cpufreq drivers (or devfreq), which is later
than fs_initcall, so the debugfs is setup. We even have added recently
a dedicated callback into the cpufreq (register_em()) for that.

Do you have such code which registers EM for CPUs (or some devfreq)
earlier than this fs_initcall?

I cannot find such code in mainline.

Regards,
Lukasz