linux-kernel - Re: [PATCH 12/17] powerpc: method to initialize ec and vp cores

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Message-ID: <202511211643.QVn7aDHd-lkp@intel.com>
Date: Fri, 21 Nov 2025 16:29:28 +0800
From: kernel test robot <lkp@...el.com>
To: Shrikanth Hegde <sshegde@...ux.ibm.com>, linux-kernel@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org
Cc: oe-kbuild-all@...ts.linux.dev, sshegde@...ux.ibm.com, mingo@...hat.com,
	peterz@...radead.org, juri.lelli@...hat.com,
	vincent.guittot@...aro.org, tglx@...utronix.de,
	yury.norov@...il.com, maddy@...ux.ibm.com, srikar@...ux.ibm.com,
	gregkh@...uxfoundation.org, pbonzini@...hat.com, seanjc@...gle.com,
	kprateek.nayak@....com, vschneid@...hat.com, iii@...ux.ibm.com,
	huschle@...ux.ibm.com, rostedt@...dmis.org,
	dietmar.eggemann@....com, christophe.leroy@...roup.eu
Subject: Re: [PATCH 12/17] powerpc: method to initialize ec and vp cores

Hi Shrikanth,

kernel test robot noticed the following build errors:

[auto build test ERROR on tip/sched/core]
[also build test ERROR on next-20251121]
[cannot apply to powerpc/next powerpc/fixes driver-core/driver-core-testing driver-core/driver-core-next driver-core/driver-core-linus linus/master v6.18-rc6]
[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/Shrikanth-Hegde/sched-docs-Document-cpu_paravirt_mask-and-Paravirt-CPU-concept/20251119-204931
base:   tip/sched/core
patch link:    https://lore.kernel.org/r/20251119124449.1149616-13-sshegde%40linux.ibm.com
patch subject: [PATCH 12/17] powerpc: method to initialize ec and vp cores
config: powerpc-randconfig-002-20251121 (https://download.01.org/0day-ci/archive/20251121/202511211643.QVn7aDHd-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251121/202511211643.QVn7aDHd-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/202511211643.QVn7aDHd-lkp@intel.com/

All errors (new ones prefixed by >>):

   powerpc-linux-ld: arch/powerpc/kernel/smp.o: in function `smp_cpus_done':
>> arch/powerpc/kernel/smp.c:1735:(.init.text+0xd5c): undefined reference to `pseries_init_ec_vp_cores'


vim +1735 arch/powerpc/kernel/smp.c

  1721	
  1722	void __init smp_cpus_done(unsigned int max_cpus)
  1723	{
  1724		/*
  1725		 * We are running pinned to the boot CPU, see rest_init().
  1726		 */
  1727		if (smp_ops && smp_ops->setup_cpu)
  1728			smp_ops->setup_cpu(boot_cpuid);
  1729	
  1730		if (smp_ops && smp_ops->bringup_done)
  1731			smp_ops->bringup_done();
  1732	
  1733		dump_numa_cpu_topology();
  1734		build_sched_topology();
> 1735		pseries_init_ec_vp_cores();
  1736	}
  1737	

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