linux-kernel - Re: [PATCH] PM: QoS: Introduce boot parameter pm_qos_resume_latency

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Message-ID: <202601231542.GkFyNtdd-lkp@intel.com>
Date: Fri, 23 Jan 2026 15:47:39 +0800
From: kernel test robot <lkp@...el.com>
To: Aaron Tomlin <atomlin@...mlin.com>, rafael@...nel.org, dakr@...nel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev, pavel@...nel.org,
	lenb@...nel.org, neelx@...e.com, atomlin@...mlin.com, sean@...e.io,
	mproche@...il.com, chjohnst@...il.com, nick.lange@...il.com,
	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: [PATCH] PM: QoS: Introduce boot parameter
 pm_qos_resume_latency_us

Hi Aaron,

kernel test robot noticed the following build warnings:

[auto build test WARNING on driver-core/driver-core-testing]
[also build test WARNING on driver-core/driver-core-next driver-core/driver-core-linus rafael-pm/linux-next rafael-pm/bleeding-edge linus/master amd-pstate/linux-next amd-pstate/bleeding-edge v6.19-rc6 next-20260122]
[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/Aaron-Tomlin/PM-QoS-Introduce-boot-parameter-pm_qos_resume_latency_us/20260123-090409
base:   driver-core/driver-core-testing
patch link:    https://lore.kernel.org/r/20260123010024.3301276-1-atomlin%40atomlin.com
patch subject: [PATCH] PM: QoS: Introduce boot parameter pm_qos_resume_latency_us
config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20260123/202601231542.GkFyNtdd-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260123/202601231542.GkFyNtdd-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/202601231542.GkFyNtdd-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> kernel/power/qos.c:56:13: warning: unused variable 'pm_qos_resume_latency_cmdline' [-Wunused-variable]
      56 | static char pm_qos_resume_latency_cmdline[COMMAND_LINE_SIZE] __initdata;
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.

vim +/pm_qos_resume_latency_cmdline +56 kernel/power/qos.c

    55	
  > 56	static char pm_qos_resume_latency_cmdline[COMMAND_LINE_SIZE] __initdata;
    57	

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