From: Rob Herring <robh@kernel.org>
To: Ian Rogers <irogers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] libperf test: Silence printf flag warning
Date: Tue, 4 May 2021 20:53:33 -0500 [thread overview]
Message-ID: <CAL_JsqLUxMOF_AhtDj7KuPmBzax-ZejSC76HNOOTr-Pq5fdj7Q@mail.gmail.com> (raw)
In-Reply-To: <20210504194329.840964-1-irogers@google.com>
On Tue, May 4, 2021 at 2:43 PM Ian Rogers <irogers@google.com> wrote:
>
> __u64 maybe an unsigned long, it may also differ from the format
> expected by PRIu64. Add a cast to silence the warning:
>
> tools/lib/perf/tests/test-evsel.c:176:33: error: format specifies type 'unsigned long long' but the argument has type 'unsigned long' [-Werror,-Wformat]
> __T_VERBOSE("count = %llu\n", end - start);
> ~~~~ ^~~~~~~~~~~
> %lu
Which arch/compiler did you hit this? LLVM? Would have been 64-bit
presumably. I'm wondering how I didn't...
> Signed-off-by: Ian Rogers <irogers@google.com>
> ---
> tools/lib/perf/tests/test-evsel.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/lib/perf/tests/test-evsel.c b/tools/lib/perf/tests/test-evsel.c
> index 288b5feaefe2..558097bbbfd0 100644
> --- a/tools/lib/perf/tests/test-evsel.c
> +++ b/tools/lib/perf/tests/test-evsel.c
> @@ -173,7 +173,7 @@ static int test_stat_user_read(int event)
>
> __T("invalid counter data", (end - start) > last);
> last = end - start;
> - __T_VERBOSE("count = %llu\n", end - start);
> + __T_VERBOSE("count = %llu\n", (unsigned long long)(end - start));
I think I'd either change end/start to uint64_t which matches the
count struct and use PRIu64, or change them to unsigned long long.
> }
>
> perf_evsel__munmap(evsel);
> --
> 2.31.1.607.g51e8a6a459-goog
>
next prev parent reply other threads:[~2021-05-05 1:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-04 19:43 [PATCH] libperf test: Silence printf flag warning Ian Rogers
2021-05-05 1:53 ` Rob Herring [this message]
2021-05-10 16:33 ` Ian Rogers
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