Re: [PATCH 1/1] mm/slab: mark alloc tags empty for sheafs allocated with __GFP_NO_OBJ_EXT

[Suren Baghdasaryan]

On Tue, Feb 24, 2026 at 1:14 PM Suren Baghdasaryan <surenb@xxxxxxxxxx> wrote:
>
> On Tue, Feb 24, 2026 at 10:54 AM kernel test robot <lkp@xxxxxxxxx> wrote:
> >
> > Hi Suren,
> >
> > kernel test robot noticed the following build errors:
> >
> > [auto build test ERROR on 7dff99b354601dd01829e1511711846e04340a69]
> >
> > url:    https://github.com/intel-lab-lkp/linux/commits/Suren-Baghdasaryan/mm-slab-mark-alloc-tags-empty-for-sheafs-allocated-with-__GFP_NO_OBJ_EXT/20260225-005422
> > base:   7dff99b354601dd01829e1511711846e04340a69
> > patch link:    https://lore.kernel.org/r/20260224165250.1322946-1-surenb%40google.com
> > patch subject: [PATCH 1/1] mm/slab: mark alloc tags empty for sheafs allocated with __GFP_NO_OBJ_EXT
> > config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20260225/202602250250.n38q74JK-lkp@xxxxxxxxx/config)
> > compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
> > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260225/202602250250.n38q74JK-lkp@xxxxxxxxx/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@xxxxxxxxx>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202602250250.n38q74JK-lkp@xxxxxxxxx/
> >
> > All errors (new ones prefixed by >>):
> >
> > >> mm/slub.c:2787:3: error: call to undeclared function 'mark_objexts_empty'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
> >     2787 |                 mark_objexts_empty(sheaf);
> >          |                 ^
> >    1 error generated.
>
> Thanks! In a hurry to post the fix I forgot to update the
> mark_objexts_empty() definition for !CONFIG_MEM_ALLOC_PROFILING_DEBUG.
> I'll post a fixed version shortly.

Fixed version is posted at
https://lore.kernel.org/all/20260224221132.1702713-1-surenb@xxxxxxxxxx/

>
> >
> >
> > vim +/mark_objexts_empty +2787 mm/slub.c
> >
> >   2783
> >   2784  static void free_empty_sheaf(struct kmem_cache *s, struct slab_sheaf *sheaf)
> >   2785  {
> >   2786          if (s->flags & SLAB_KMALLOC)
> > > 2787                  mark_objexts_empty(sheaf);
> >   2788
> >   2789          kfree(sheaf);
> >   2790
> >   2791          stat(s, SHEAF_FREE);
> >   2792  }
> >   2793
> >
> > --
> > 0-DAY CI Kernel Test Service
> > https://github.com/intel/lkp-tests/wiki