linux-kernel - [PATCH v3 00/12] cpufreq: use __free() for all cpufreq_cpu

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Message-Id: <20250901085748.36795-1-zhangzihuan@kylinos.cn>
Date: Mon,  1 Sep 2025 16:57:36 +0800
From: Zihuan Zhang <zhangzihuan@...inos.cn>
To: "Rafael J . wysocki" <rafael@...nel.org>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Thierry Reding <thierry.reding@...il.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Tvrtko Ursulin <tursulin@...ulin.net>,
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	Daniel Lezcano <daniel.lezcano@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Shawn Guo <shawnguo@...nel.org>,
	Eduardo Valentin <edubezval@...il.com>,
	Keerthy <j-keerthy@...com>
Cc: Ben Horgan <ben.horgan@....com>,
	zhenglifeng <zhenglifeng1@...wei.com>,
	Zhang Rui <rui.zhang@...el.com>,
	Len Brown <lenb@...nel.org>,
	Lukasz Luba <lukasz.luba@....com>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Beata Michalska <beata.michalska@....com>,
	Fabio Estevam <festevam@...il.com>,
	Pavel Machek <pavel@...nel.org>,
	Sumit Gupta <sumitg@...dia.com>,
	Prasanna Kumar T S M <ptsm@...ux.microsoft.com>,
	Sudeep Holla <sudeep.holla@....com>,
	Yicong Yang <yangyicong@...ilicon.com>,
	linux-pm@...r.kernel.org,
	linux-acpi@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org,
	intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	imx@...ts.linux.dev,
	linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Zihuan Zhang <zhangzihuan@...inos.cn>
Subject: [PATCH v3 00/12] cpufreq: use __free() for all cpufreq_cpu_get() references

This patchset converts all remaining cpufreq users to rely on the
__free(put_cpufreq_policy) annotation for policy references, instead of
calling cpufreq_cpu_put() manually.

Motivation:
- Reduce the chance of reference counting mistakes
- Make the code more consistent with the latest kernel style
- behavior remains the same, but reference counting is now safer 
  and easier to maintain.

The changes are split into 12 patches as they touch different subsystems
and are maintained by different people. There is no functional change.

V3:
 - drop patch 'KVM: x86: Use __free(put_cpufreq_policy) for policy reference'
 - removed 5 patches which has been applied
 - Consolidate CPUFreq policy assignments and allocations into one line,
   suggested by Ben Horgan
 - Change cpu_has_cpufreq() return type to bool, following Rafael's suggestion
 - Change the title to 'Use scope-based cleanup helper'

V2:
 - Fix compile error in powernv-cpufreq.c
 - Split patch to separate logical changes

Zihuan Zhang (12):
  arm64: topology: Use scope-based cleanup helper
  ACPI: processor: thermal: Use scope-based cleanup helper
  cpufreq: intel_pstate: Use scope-based cleanup helper
  cpufreq: longhaul: Use scope-based cleanup helper
  cpufreq: powernv: Use scope-based cleanup helper
  PM / devfreq: Use scope-based cleanup helper
  drm/i915: Use scope-based cleanup helper
  cpufreq: powerpc: macintosh: Use scope-based cleanup helper
  powercap: dtpm_cpu: Use scope-based cleanup helper
  thermal: imx: Use scope-based cleanup helper
  thermal/drivers/ti-soc-thermal: Use scope-based cleanup helper
  PM: EM: Use scope-based cleanup helper

 arch/arm64/kernel/topology.c                  |  9 +++----
 drivers/acpi/processor_thermal.c              | 18 +++++--------
 drivers/cpufreq/intel_pstate.c                |  8 +++---
 drivers/cpufreq/longhaul.c                    |  3 +--
 drivers/cpufreq/powernv-cpufreq.c             | 11 ++++----
 drivers/devfreq/governor_passive.c            | 25 +++++++-----------
 drivers/gpu/drm/i915/gt/intel_llc.c           |  4 +--
 drivers/macintosh/windfarm_cpufreq_clamp.c    |  5 +---
 drivers/powercap/dtpm_cpu.c                   | 26 +++++--------------
 drivers/thermal/imx_thermal.c                 | 12 +++------
 .../ti-soc-thermal/ti-thermal-common.c        | 11 +++-----
 kernel/power/energy_model.c                   |  9 +++----
 12 files changed, 46 insertions(+), 95 deletions(-)

-- 
2.25.1