linux-kernel - Re: [PATCH v1 10/10] cpufreq: Pass policy pointer to ->update

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Message-ID: <20250401085148.xj5p6ir5lkjhgwqp@vireshk-i7>
Date: Tue, 1 Apr 2025 14:21:48 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: Linux PM <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Mario Limonciello <mario.limonciello@....com>,
	Sudeep Holla <sudeep.holla@....com>
Subject: Re: [PATCH v1 10/10] cpufreq: Pass policy pointer to
 ->update_limits()

On 28-03-25, 21:48, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Since cpufreq_update_limits() obtains a cpufreq policy pointer for the
> given CPU and reference counts the corresponding policy object, it may
> as well pass the policy pointer to the cpufreq driver's ->update_limits()
> callback which allows that callback to avoid invoking cpufreq_cpu_get()
> for the same CPU.
> 
> Accordingly, redefine ->update_limits() to take a policy pointer instead
> of a CPU number and update both drivers implementing it, intel_pstate
> and amd-pstate, as needed.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
>  drivers/cpufreq/amd-pstate.c   |    7 ++-----
>  drivers/cpufreq/cpufreq.c      |    2 +-
>  drivers/cpufreq/intel_pstate.c |   29 ++++++++++++++++++-----------
>  include/linux/cpufreq.h        |    2 +-
>  4 files changed, 22 insertions(+), 18 deletions(-)

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

-- 
viresh