[PATCH bpf] selftests: bpf: test_progs: initialize duration in singal_pending test

[Stanislav Fomichev]

CHECK macro implicitly uses duration. We call CHECK() a couple of times
before duration is initialized from bpf_prog_test_run().
Explicitly set duration to 0 to avoid compiler warnings.

Fixes: 740f8a657221 ("selftests/bpf: make sure signal interrupts 
BPF_PROG_TEST_RUN")

Signed-off-by: Stanislav Fomichev <s...@google.com>
---
 tools/testing/selftests/bpf/prog_tests/signal_pending.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/signal_pending.c 
b/tools/testing/selftests/bpf/prog_tests/signal_pending.c
index f2a37bbf91ab..996e808f43a2 100644
--- a/tools/testing/selftests/bpf/prog_tests/signal_pending.c
+++ b/tools/testing/selftests/bpf/prog_tests/signal_pending.c
@@ -12,7 +12,7 @@ static void test_signal_pending_by_type(enum bpf_prog_type 
prog_type)
        struct itimerval timeo = {
                .it_value.tv_usec = 100000, /* 100ms */
        };
-       __u32 duration, retval;
+       __u32 duration = 0, retval;
        int prog_fd;
        int err;
        int i;
-- 
2.21.0.352.gf09ad66450-goog