linux-kernel - Re: [PATCH v5 07/11] cpufreq: CPPC: Add sysfs for min/max_perf and perf

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Message-ID: <202512241930.heuhsbt9-lkp@intel.com>
Date: Wed, 24 Dec 2025 19:32:53 +0100
From: kernel test robot <lkp@...el.com>
To: Sumit Gupta <sumitg@...dia.com>, rafael@...nel.org,
	viresh.kumar@...aro.org, lenb@...nel.org, robert.moore@...el.com,
	corbet@....net, pierre.gondois@....com, zhenglifeng1@...wei.com,
	rdunlap@...radead.org, ray.huang@....com, gautham.shenoy@....com,
	mario.limonciello@....com, perry.yuan@....com,
	ionela.voinescu@....com, zhanjie9@...ilicon.com,
	linux-pm@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-doc@...r.kernel.org, acpica-devel@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, linux-tegra@...r.kernel.org,
	treding@...dia.com, jonathanh@...dia.com, vsethi@...dia.com,
	ksitaraman@...dia.com, sanjayc@...dia.com, nhartman@...dia.com,
	bbasu@...dia.com, sumitg@...dia.com
Subject: Re: [PATCH v5 07/11] cpufreq: CPPC: Add sysfs for min/max_perf and
 perf_limited

Hi Sumit,

kernel test robot noticed the following build warnings:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on rafael-pm/bleeding-edge linus/master v6.19-rc2 next-20251219]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Sumit-Gupta/cpufreq-CPPC-Add-generic-helpers-for-sysfs-show-store/20251224-001833
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20251223121307.711773-8-sumitg%40nvidia.com
patch subject: [PATCH v5 07/11] cpufreq: CPPC: Add sysfs for min/max_perf and perf_limited
reproduce: (https://download.01.org/0day-ci/archive/20251224/202512241930.heuhsbt9-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512241930.heuhsbt9-lkp@intel.com/

All warnings (new ones prefixed by >>):

   Using alabaster theme
   ERROR: Cannot find file ./include/linux/pci.h
   WARNING: No kernel-doc for file ./include/linux/pci.h
   ERROR: Cannot find file ./include/linux/mod_devicetable.h
   WARNING: No kernel-doc for file ./include/linux/mod_devicetable.h
>> Documentation/ABI/testing/sysfs-devices-system-cpu:356: WARNING: Definition list ends without a blank line; unexpected unindent. [docutils]
   ERROR: Cannot find file ./include/linux/bootconfig.h
   WARNING: No kernel-doc for file ./include/linux/bootconfig.h
   ERROR: Cannot find file ./include/linux/pstore_zone.h
   ERROR: Cannot find file ./include/linux/pstore_zone.h
   WARNING: No kernel-doc for file ./include/linux/pstore_zone.h


vim +356 Documentation/ABI/testing/sysfs-devices-system-cpu

   347	
   348			Read/write a frequency value in kHz from/to this file. This
   349			file sets the maximum performance level (as frequency) at
   350			which the platform may run. The frequency value is internally
   351			converted to a performance value and must be in the range
   352			[cpuinfo_min_freq, cpuinfo_max_freq], inclusive.
   353	
   354			This file is only present if the cppc-cpufreq driver is in use.
   355	
 > 356	What:		/sys/devices/system/cpu/cpuX/cpufreq/perf_limited
   357	Date:		February 2026
   358	Contact:	linux-pm@...r.kernel.org
   359	Description:	Performance Limited
   360	
   361			Read to check if platform throttling (thermal/power/current
   362			limits) caused delivered performance to fall below the
   363			requested level. A non-zero value indicates throttling occurred.
   364	
   365			Write the bitmask of bits to clear:
   366			  1 = clear bit 0 (desired performance excursion)
   367			  2 = clear bit 1 (minimum performance excursion)
   368			  3 = clear both bits
   369			The platform sets these bits; OSPM can only clear them.
   370	
   371			This file is only present if the cppc-cpufreq driver is in use.
   372	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki