`cur64`, `start64` and `ts_delta` are int64_t. Change format specifiers in fprintf from '%lu' to '%ld'. It has been tested with gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0 on x86_64. Signed-off-by: Guo Zhengkui <guozhengkui@xxxxxxxx> --- tools/testing/selftests/net/txtimestamp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/net/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c index fabb1d555ee5..b8a52995a635 100644 --- a/tools/testing/selftests/net/txtimestamp.c +++ b/tools/testing/selftests/net/txtimestamp.c @@ -161,7 +161,7 @@ static void validate_timestamp(struct timespec *cur, int min_delay) max_delay = min_delay + cfg_delay_tolerance_usec; if (cur64 < start64 + min_delay || cur64 > start64 + max_delay) { - fprintf(stderr, "ERROR: %lu us expected between %d and %d\n", + fprintf(stderr, "ERROR: %ld us expected between %d and %d\n", cur64 - start64, min_delay, max_delay); test_failed = true; } @@ -170,9 +170,9 @@ static void validate_timestamp(struct timespec *cur, int min_delay) static void __print_ts_delta_formatted(int64_t ts_delta) { if (cfg_print_nsec) - fprintf(stderr, "%lu ns", ts_delta); + fprintf(stderr, "%ld ns", ts_delta); else - fprintf(stderr, "%lu us", ts_delta / NSEC_PER_USEC); + fprintf(stderr, "%ld us", ts_delta / NSEC_PER_USEC); } static void __print_timestamp(const char *name, struct timespec *cur, -- 2.17.1