Re: [PATCH v3 1/4] cpumask: Fix invalid uniprocessor mask assumption

[Andy Shevchenko]

On Mon, Jun 06, 2022 at 08:48:05AM +0800, kernel test robot wrote:
> Hi Sander,
> 
> I love your patch! Yet something to improve:
> 
> [auto build test ERROR on akpm-mm/mm-everything]
> [also build test ERROR on linus/master v5.18 next-20220603]
> [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]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Sander-Vanheule/cpumask-Fix-invalid-uniprocessor-assumptions/20220606-004959
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> config: i386-randconfig-a009 (https://download.01.org/0day-ci/archive/20220606/202206060858.wA0FOzRy-lkp@xxxxxxxxx/config)
> compiler: gcc-11 (Debian 11.3.0-1) 11.3.0
> reproduce (this is a W=1 build):
>         # https://github.com/intel-lab-lkp/linux/commit/37b3f10c4604ea299b454f39ac5ba3cad903ae16
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Sander-Vanheule/cpumask-Fix-invalid-uniprocessor-assumptions/20220606-004959
>         git checkout 37b3f10c4604ea299b454f39ac5ba3cad903ae16
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> 
> All errors (new ones prefixed by >>):
> 
>    ld: arch/x86/kernel/cpu/cacheinfo.o: in function `__cache_amd_cpumap_setup':
>    arch/x86/kernel/cpu/cacheinfo.c:890: undefined reference to `cpu_llc_shared_map'
> >> ld: arch/x86/kernel/cpu/cacheinfo.c:895: undefined reference to `cpu_llc_shared_map'

Seems like somewhere we need stubs for UP builds for those cache related functions.


-- 
With Best Regards,
Andy Shevchenko