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

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Message-ID: <202511211747.WJdFJoRB-lkp@intel.com>
Date: Fri, 21 Nov 2025 18:14:50 +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: llvm@...ts.linux.dev, 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-pasemi_defconfig (https://download.01.org/0day-ci/archive/20251121/202511211747.WJdFJoRB-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9e9fe08b16ea2c4d9867fb4974edf2a3776d6ece)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251121/202511211747.WJdFJoRB-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/202511211747.WJdFJoRB-lkp@intel.com/

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: pseries_init_ec_vp_cores
   >>> referenced by smp.c
   >>>               arch/powerpc/kernel/smp.o:(smp_cpus_done) in archive vmlinux.a

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