linux-kernel - Re: [PATCH v3 41/44] x86/cpu: <asm/processor.h>: Do not include CPUID API header

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Message-ID: <202506132039.imS2Pflx-lkp@intel.com>
Date: Fri, 13 Jun 2025 20:46:53 +0800
From: kernel test robot <lkp@...el.com>
To: "Ahmed S. Darwish" <darwi@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>
Cc: oe-kbuild-all@...ts.linux.dev, Thomas Gleixner <tglx@...utronix.de>,
	Andrew Cooper <andrew.cooper3@...rix.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Sean Christopherson <seanjc@...gle.com>,
	Sohil Mehta <sohil.mehta@...el.com>,
	Ard Biesheuvel <ardb@...nel.org>,
	John Ogness <john.ogness@...utronix.de>, x86@...nel.org,
	x86-cpuid@...ts.linux.dev, LKML <linux-kernel@...r.kernel.org>,
	"Ahmed S. Darwish" <darwi@...utronix.de>
Subject: Re: [PATCH v3 41/44] x86/cpu: <asm/processor.h>: Do not include
 CPUID API header

Hi Ahmed,

kernel test robot noticed the following build errors:

[auto build test ERROR on 19272b37aa4f83ca52bdf9c16d5d81bdd1354494]

url:    https://github.com/intel-lab-lkp/linux/commits/Ahmed-S-Darwish/x86-cpuid-Remove-transitional-asm-cpuid-h-header/20250613-075051
base:   19272b37aa4f83ca52bdf9c16d5d81bdd1354494
patch link:    https://lore.kernel.org/r/20250612234010.572636-42-darwi%40linutronix.de
patch subject: [PATCH v3 41/44] x86/cpu: <asm/processor.h>: Do not include CPUID API header
config: i386-randconfig-004-20250613 (https://download.01.org/0day-ci/archive/20250613/202506132039.imS2Pflx-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250613/202506132039.imS2Pflx-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/202506132039.imS2Pflx-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/cpufreq/longrun.c: In function 'longrun_get':
>> drivers/cpufreq/longrun.c:143:9: error: implicit declaration of function 'cpuid' [-Werror=implicit-function-declaration]
     143 |         cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
         |         ^~~~~
   cc1: some warnings being treated as errors


vim +/cpuid +143 drivers/cpufreq/longrun.c

^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  135  
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  136  static unsigned int longrun_get(unsigned int cpu)
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  137  {
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  138  	u32 eax, ebx, ecx, edx;
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  139  
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  140  	if (cpu)
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  141  		return 0;
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  142  
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16 @143  	cpuid(0x80860007, &eax, &ebx, &ecx, &edx);
2d06d8c49afdcc arch/x86/kernel/cpu/cpufreq/longrun.c  Dominik Brodowski 2011-03-27  144  	pr_debug("cpuid eax is %u\n", eax);
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  145  
48ee923a666d4c arch/x86/kernel/cpu/cpufreq/longrun.c  Dave Jones        2009-01-17  146  	return eax * 1000;
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  147  }
^1da177e4c3f41 arch/i386/kernel/cpu/cpufreq/longrun.c Linus Torvalds    2005-04-16  148  

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