On Fri, Nov 09, 2018 at 10:18:16AM -0800, Joe Stringer wrote:
> Daniel Borkmann reports:
>
> test_progs.c: In function ‘main’:
> test_progs.c:81:3: warning: ‘duration’ may be used uninitialized in this
> function [-Wmaybe-uninitialized]
> printf("%s:PASS:%s %d nsec\n", __func__, tag, duration);\
> ^~~~~~
> test_progs.c:1706:8: note: ‘duration’ was declared here
> __u32 duration;
> ^~~~~~~~
>
> Signed-off-by: Joe Stringer <j...@wand.net.nz>
I can repro with my locally compiled gcc 7.3. It fixed the warning.
Acked-by: Martin KaFai Lau <ka...@fb.com>
> ---
>
> I'm actually not able to reproduce this with GCC 7.3 or 8.2, so I'll
> rely on review to establish that this patch works as intended.
> ---
> tools/testing/selftests/bpf/test_progs.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/testing/selftests/bpf/test_progs.c
> b/tools/testing/selftests/bpf/test_progs.c
> index 2d3c04f45530..c1e688f61061 100644
> --- a/tools/testing/selftests/bpf/test_progs.c
> +++ b/tools/testing/selftests/bpf/test_progs.c
> @@ -1703,7 +1703,7 @@ static void test_reference_tracking()
> const char *file = "./test_sk_lookup_kern.o";
> struct bpf_object *obj;
> struct bpf_program *prog;
> - __u32 duration;
> + __u32 duration = 0;
> int err = 0;
>
> obj = bpf_object__open(file);
> --
> 2.17.1
>
