linux-kernel - Re: [PATCH v1 2/2] mm: mTHP stats for pagecache folio allocations

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Message-ID: <aab4c18a-a30e-482d-9c4b-9ae04840881a@arm.com>
Date: Mon, 15 Jul 2024 14:55:49 +0100
From: Ryan Roberts <ryan.roberts@....com>
To: kernel test robot <lkp@...el.com>,
 Andrew Morton <akpm@...ux-foundation.org>, Hugh Dickins <hughd@...gle.com>,
 Jonathan Corbet <corbet@....net>,
 "Matthew Wilcox (Oracle)" <willy@...radead.org>,
 David Hildenbrand <david@...hat.com>, Barry Song <baohua@...nel.org>,
 Lance Yang <ioworker0@...il.com>, Baolin Wang <baolin.wang@...ux.alibaba.com>
Cc: oe-kbuild-all@...ts.linux.dev,
 Linux Memory Management List <linux-mm@...ck.org>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/2] mm: mTHP stats for pagecache folio allocations

On 12/07/2024 23:44, kernel test robot wrote:
> Hi Ryan,
> 
> kernel test robot noticed the following build errors:
> 
> [auto build test ERROR on akpm-mm/mm-everything]
> [also build test ERROR on next-20240712]
> [cannot apply to linus/master v6.10-rc7]
> [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/Ryan-Roberts/mm-Cleanup-count_mthp_stat-definition/20240711-154455
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link:    https://lore.kernel.org/r/20240711072929.3590000-3-ryan.roberts%40arm.com
> patch subject: [PATCH v1 2/2] mm: mTHP stats for pagecache folio allocations
> config: arm64-defconfig (https://download.01.org/0day-ci/archive/20240713/202407130620.DbyYULnj-lkp@intel.com/config)
> compiler: aarch64-linux-gcc (GCC) 14.1.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240713/202407130620.DbyYULnj-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/202407130620.DbyYULnj-lkp@intel.com/
> 
> All errors (new ones prefixed by >>, old ones prefixed by <<):

[...]

>>> ERROR: modpost: "mthp_stats" [fs/btrfs/btrfs.ko] undefined!

I'm assuming this last line is the problem one? I can't reproduce this following
your instructions and I can't see any issue based on inspection. Is it possible
this is a false positive?

Thanks,
Ryan