Re: [PATCH 2/6] selftests/cachestat: Fix print_cachestat format

[Nhat Pham]

On Mon, Aug 28, 2023 at 6:50 AM Wieczor-Retman, Maciej
<maciej.wieczor-retman@xxxxxxxxx> wrote:
>
> The format specifier in printf() call expects long int variables and
> received long long int.
>
> Change format specifiers to long long int so they match passed
> variables.
>
> Signed-off-by: Wieczor-Retman, Maciej <maciej.wieczor-retman@xxxxxxxxx>
> ---
>  tools/testing/selftests/cachestat/test_cachestat.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/cachestat/test_cachestat.c b/tools/testing/selftests/cachestat/test_cachestat.c
> index 77620e7ecf56..a7adf42afb20 100644
> --- a/tools/testing/selftests/cachestat/test_cachestat.c
> +++ b/tools/testing/selftests/cachestat/test_cachestat.c
> @@ -25,7 +25,7 @@ static const char * const dev_files[] = {
>  void print_cachestat(struct cachestat *cs)
>  {
>         ksft_print_msg(
> -       "Using cachestat: Cached: %lu, Dirty: %lu, Writeback: %lu, Evicted: %lu, Recently Evicted: %lu\n",
> +       "Using cachestat: Cached: %llu, Dirty: %llu, Writeback: %llu, Evicted: %llu, Recently Evicted: %llu\n",
The fields of struct cachestat should all be unsigned longs,
Is there a compiler warning that prompt this change?
>         cs->nr_cache, cs->nr_dirty, cs->nr_writeback,
>         cs->nr_evicted, cs->nr_recently_evicted);
>  }
> --
> 2.42.0
>