linux-kernel - Re: [PATCH v1 1/2] kasan: Unpoison pcpu chunks with base address tag

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Message-ID: <202511060927.eg2dcKpK-lkp@intel.com>
Date: Thu, 6 Nov 2025 09:42:22 +0800
From: kernel test robot <lkp@...el.com>
To: Maciej Wieczor-Retman <m.wieczorretman@...me>,
	Andrey Ryabinin <ryabinin.a.a@...il.com>,
	Alexander Potapenko <glider@...gle.com>,
	Andrey Konovalov <andreyknvl@...il.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Vincenzo Frascino <vincenzo.frascino@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Uladzislau Rezki <urezki@...il.com>, Marco Elver <elver@...gle.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	Linux Memory Management List <linux-mm@...ck.org>,
	m.wieczorretman@...me, stable@...r.kernel.org,
	Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
	Baoquan He <bhe@...hat.com>, kasan-dev@...glegroups.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/2] kasan: Unpoison pcpu chunks with base address tag

Hi Maciej,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on linus/master v6.18-rc4 next-20251105]
[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/Maciej-Wieczor-Retman/kasan-Unpoison-pcpu-chunks-with-base-address-tag/20251104-225204
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/821677dd824d003cc5b7a77891db4723e23518ea.1762267022.git.m.wieczorretman%40pm.me
patch subject: [PATCH v1 1/2] kasan: Unpoison pcpu chunks with base address tag
config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20251106/202511060927.eg2dcKpK-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project d2625a438020ad35330cda29c3def102c1687b1b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251106/202511060927.eg2dcKpK-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/202511060927.eg2dcKpK-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/kasan/common.c:584:6: warning: no previous prototype for function '__kasan_unpoison_vmap_areas' [-Wmissing-prototypes]
     584 | void __kasan_unpoison_vmap_areas(struct vm_struct **vms, int nr_vms)
         |      ^
   mm/kasan/common.c:584:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     584 | void __kasan_unpoison_vmap_areas(struct vm_struct **vms, int nr_vms)
         | ^
         | static 
   1 warning generated.


vim +/__kasan_unpoison_vmap_areas +584 mm/kasan/common.c

   583	
 > 584	void __kasan_unpoison_vmap_areas(struct vm_struct **vms, int nr_vms)

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