On Tue, Jan 22, 2019 at 05:34:39PM -0600, Gustavo A. R. Silva wrote:
> Notice that the use of the bitwise OR operator '|' always leads to
> true in this particular case, which seems a bit suspicious due to
> the context in which this expression is being used.
>
> Fix this by using bitwise AND operator '&' instead.
>
> This bug was detected with the help of Coccinelle.
>
> Fixes: 6a6cd11d4e57 ("perf test: Add test for the sched tracepoint format
> fields")
> Cc: sta...@vger.kernel.org
> Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
nice catch
Acked-by: Jiri Olsa <jo...@kernel.org>
thanks,
jirka
> ---
>
> NOTE: Notice that this code has been there since 2012. So, it would
> be helpful if someone can double-check this. Thanks.
>
> tools/perf/tests/evsel-tp-sched.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/perf/tests/evsel-tp-sched.c
> b/tools/perf/tests/evsel-tp-sched.c
> index 5f8501c68da4..5cbba70bcdd0 100644
> --- a/tools/perf/tests/evsel-tp-sched.c
> +++ b/tools/perf/tests/evsel-tp-sched.c
> @@ -17,7 +17,7 @@ static int perf_evsel__test_field(struct perf_evsel *evsel,
> const char *name,
> return -1;
> }
>
> - is_signed = !!(field->flags | TEP_FIELD_IS_SIGNED);
> + is_signed = !!(field->flags & TEP_FIELD_IS_SIGNED);
> if (should_be_signed && !is_signed) {
> pr_debug("%s: \"%s\" signedness(%d) is wrong, should be %d\n",
> evsel->name, name, is_signed, should_be_signed);
> --
> 2.20.1
>
