linux-kernel - Re: [PATCH 05/10] sched/fair: Wire up yield deboost in yield_to_task

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Message-ID: <202511101338.8AICyae8-lkp@intel.com>
Date: Mon, 10 Nov 2025 13:16:39 +0800
From: kernel test robot <lkp@...el.com>
To: Wanpeng Li <kernellwp@...il.com>, Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paolo Bonzini <pbonzini@...hat.com>,
	Sean Christopherson <seanjc@...gle.com>
Cc: oe-kbuild-all@...ts.linux.dev, Steven Rostedt <rostedt@...dmis.org>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Juri Lelli <juri.lelli@...hat.com>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, Wanpeng Li <wanpengli@...cent.com>
Subject: Re: [PATCH 05/10] sched/fair: Wire up yield deboost in
 yield_to_task_fair()

Hi Wanpeng,

kernel test robot noticed the following build errors:

[auto build test ERROR on kvm/queue]
[also build test ERROR on kvm/next tip/sched/core tip/master linus/master v6.18-rc5 next-20251107]
[cannot apply to kvm/linux-next tip/auto-latest]
[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/Wanpeng-Li/sched-Add-vCPU-debooster-infrastructure/20251110-114219
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
patch link:    https://lore.kernel.org/r/20251110033232.12538-6-kernellwp%40gmail.com
patch subject: [PATCH 05/10] sched/fair: Wire up yield deboost in yield_to_task_fair()
config: m68k-allnoconfig (https://download.01.org/0day-ci/archive/20251110/202511101338.8AICyae8-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251110/202511101338.8AICyae8-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/202511101338.8AICyae8-lkp@intel.com/

All errors (new ones prefixed by >>):

   m68k-linux-ld: kernel/sched/fair.o: in function `yield_deboost_calculate_penalty':
>> fair.c:(.text+0x1588): undefined reference to `__udivdi3'

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