Re: include/linux/slab.h:552:15: error: type defaults to 'int' in declaration of 'kmem_buckets_create'

[Kees Cook <kees@kernel.org>]

On Wed, Aug 28, 2024 at 05:21:04AM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   3ec3f5fc4a91e389ea56b111a73d97ffc94f19c6
> commit: b32801d1255be1da62ea8134df3ed9f3331fba12 mm/slab: Introduce kmem_buckets_create() and family
> date:   8 weeks ago
> config: x86_64-randconfig-072-20240827 (https://download.01.org/0day-ci/archive/20240828/202408280559.FIsoHAAc-lkp@intel.com/config)
> compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240828/202408280559.FIsoHAAc-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@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202408280559.FIsoHAAc-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>    arch/x86/include/asm/fpu/types.h:355:22: note: in expansion of macro 'PAGE_SIZE'
>      355 |         u8 __padding[PAGE_SIZE];
>          |                      ^~~~~~~~~
>    arch/x86/include/asm/page_types.h:10:33: warning: "CONFIG_PAGE_SHIFT" is not defined, evaluates to 0 [-Wundef]
>       10 | #define PAGE_SHIFT              CONFIG_PAGE_SHIFT
>          |                                 ^~~~~~~~~~~~~~~~~

This continues to be a problem with CONFIG_PAGE_SHIFT with this config,
and is a known problem with no clear fix[1]. I think reports could be
silenced for now.

-Kees

[1] https://lore.kernel.org/all/85bb8bbc-f48d-46fd-aebb-03b2f7d3980a@app.fastmail.com/

-- 
Kees Cook