linux-kernel - Re: [PATCH v1 05/13] thermal: core: Store trip pointer in struct thermal

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Message-ID: <bb7f32c9-249c-2ad8-135c-82098430bcfd@linaro.org>
Date:   Wed, 27 Sep 2023 16:56:41 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux PM <linux-pm@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Lukasz Luba <lukasz.luba@....com>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH v1 05/13] thermal: core: Store trip pointer in struct
 thermal_instance

On 21/09/2023 19:52, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Replace the integer trip number stored in struct thermal_instance with
> a pointer to the relevant trip and adjust the code using the structure
> in question accordingly.
> 
> The main reason for making this change is to allow the trip point to
> cooling device binding code more straightforward, as illustrated by
> subsequent modifications of the ACPI thermal driver, but it also helps
> to clarify the overall design and allows the governor code overhead to
> be reduced (through subsequent modifications).
> 
> The only case in which it adds complexity is trip_point_show() that
> needs to walk the trips[] table to find the index of the given trip
> point, but this is not a critical path and the interface that
> trip_point_show() belongs to is problematic anyway (for instance, it
> doesn't cover the case when the same cooling devices is associated
> with multiple trip points).
> 
> This is a preliminary change and the affected code will be refined by
> a series of subsequent modifications of thermal governors, the core and
> the ACPI thermal driver.
> 
> The general functionality is not expected to be affected by this change.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---

Reviewed-by: Daniel Lezcano <daniel.lezcano@...aro.org>

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