linux-kernel - Re: [PATCH v2 3/3] mm: add WQ_PERCPU to alloc

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Message-ID: <202601140922.x7qD91JV-lkp@intel.com>
Date: Wed, 14 Jan 2026 10:03:41 +0800
From: kernel test robot <lkp@...el.com>
To: Marco Crivellari <marco.crivellari@...e.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Tejun Heo <tj@...nel.org>, Lai Jiangshan <jiangshanlai@...il.com>,
	Frederic Weisbecker <frederic@...nel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Marco Crivellari <marco.crivellari@...e.com>,
	Michal Hocko <mhocko@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Memory Management List <linux-mm@...ck.org>
Subject: Re: [PATCH v2 3/3] mm: add WQ_PERCPU to alloc_workqueue users

Hi Marco,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on linus/master v6.19-rc5 next-20260113]
[cannot apply to vbabka-slab/for-next]
[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/Marco-Crivellari/mm-Replace-use-of-system_unbound_wq-with-system_dfl_wq/20260113-195017
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20260113114630.152942-4-marco.crivellari%40suse.com
patch subject: [PATCH v2 3/3] mm: add WQ_PERCPU to alloc_workqueue users
config: arm-randconfig-002-20260114 (https://download.01.org/0day-ci/archive/20260114/202601140922.x7qD91JV-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260114/202601140922.x7qD91JV-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/202601140922.x7qD91JV-lkp@intel.com/

All errors (new ones prefixed by >>):

>> mm/slub.c:8545:2: error: unterminated conditional directive
    8545 | #ifndef CONFIG_SLUB_TINY
         |  ^
   1 error generated.


vim +8545 mm/slub.c

  8542	
  8543	void __init kmem_cache_init_late(void)
  8544	{
> 8545	#ifndef CONFIG_SLUB_TINY
  8546		flushwq = alloc_workqueue("slub_flushwq", WQ_MEM_RECLAIM | WQ_PERCPU,
  8547					  0);
  8548		WARN_ON(!flushwq);
  8549	}
  8550	

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