linux-kernel - Re: [PATCH v6 2/4] arch_topology: Support SMT control for OF based system

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Message-ID: <202410161302.HjmSau6j-lkp@intel.com>
Date: Wed, 16 Oct 2024 14:19:05 +0800
From: kernel test robot <lkp@...el.com>
To: Yicong Yang <yangyicong@...wei.com>, catalin.marinas@....com,
	will@...nel.org, sudeep.holla@....com, tglx@...utronix.de,
	mpe@...erman.id.au, linux-arm-kernel@...ts.infradead.org,
	mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
	pierre.gondois@....com, dietmar.eggemann@....com
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linuxppc-dev@...ts.ozlabs.org, x86@...nel.org,
	linux-kernel@...r.kernel.org, morten.rasmussen@....com,
	msuchanek@...e.de, gregkh@...uxfoundation.org, rafael@...nel.org,
	jonathan.cameron@...wei.com, prime.zeng@...ilicon.com,
	linuxarm@...wei.com, yangyicong@...ilicon.com, xuwei5@...wei.com,
	guohanjun@...wei.com
Subject: Re: [PATCH v6 2/4] arch_topology: Support SMT control for OF based
 system

Hi Yicong,

kernel test robot noticed the following build warnings:

[auto build test WARNING on arm64/for-next/core]
[also build test WARNING on powerpc/next powerpc/fixes driver-core/driver-core-testing driver-core/driver-core-next driver-core/driver-core-linus linus/master tip/x86/core v6.12-rc3 next-20241015]
[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/Yicong-Yang/cpu-SMT-Provide-a-default-topology_is_primary_thread/20241015-102147
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
patch link:    https://lore.kernel.org/r/20241015021841.35713-3-yangyicong%40huawei.com
patch subject: [PATCH v6 2/4] arch_topology: Support SMT control for OF based system
config: arm-defconfig (https://download.01.org/0day-ci/archive/20241016/202410161302.HjmSau6j-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241016/202410161302.HjmSau6j-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/202410161302.HjmSau6j-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/base/arch_topology.c:32:21: warning: unused variable 'max_smt_thread_num' [-Wunused-variable]
   static unsigned int max_smt_thread_num;
                       ^
   1 warning generated.


vim +/max_smt_thread_num +32 drivers/base/arch_topology.c

    28	
    29	static DEFINE_PER_CPU(struct scale_freq_data __rcu *, sft_data);
    30	static struct cpumask scale_freq_counters_mask;
    31	static bool scale_freq_invariant;
  > 32	static unsigned int max_smt_thread_num;
    33	DEFINE_PER_CPU(unsigned long, capacity_freq_ref) = 1;
    34	EXPORT_PER_CPU_SYMBOL_GPL(capacity_freq_ref);
    35	

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