Re: [akpm-mm:mm-new 279/310] memory-failure.c:275:49: warning: format specifies type 'unsigned long' but the argument has type '__fsword_t' (aka 'int')

[Andrew Morton <akpm@linux-foundation.org>]

On Thu, 22 Jan 2026 12:00:08 +0100 kernel test robot <lkp@intel.com> wrote:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-new
> head:   dc4fe40a11269aead253fa0beb098b00417b8694
> commit: ce9b369feafe8c65aa134b0c8791bf7f19e463e2 [279/310] selftests/mm: add memory failure clean pagecache test
> config: i386-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260122/202601221142.mDWA1ucw-lkp@intel.com/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/20260122/202601221142.mDWA1ucw-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/202601221142.mDWA1ucw-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
> >> memory-failure.c:275:49: warning: format specifies type 'unsigned long' but the argument has type '__fsword_t' (aka 'int') [-Wformat]
>      275 |                 SKIP(return, "unsupported filesystem :%lx\n", fs_type);
>          |                                                       ~~~     ^~~~~~~
>          |                                                       %x

Thanks.

I don't think we can rely upon libc's __fsword_t being `int' in all
situations for all time?

We could add the typecast but perhaps it's better to change
get_fs_type() to return int?