selftests/bpf: Fix uninitialized duration warning

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 <joe@wand.net.nz>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
index 2d3c04f4553026cf53273c3b2f98db5e23911f95..c1e688f61061c6b2443710064b42cf1257fb6c61 100644 (file)
--- 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);