| Message ID | 20200313061837.3685572-1-andriin@fb.com |
|---|---|
| State | New |
| Headers | show |
| Series | [bpf-next] selftests/bpf: fix usleep() implementation | expand |
diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c index 2b0bc1171c9c..b6201dd82edf 100644 --- a/tools/testing/selftests/bpf/test_progs.c +++ b/tools/testing/selftests/bpf/test_progs.c @@ -35,7 +35,16 @@ struct prog_test_def { */ int usleep(useconds_t usec) { - return syscall(__NR_nanosleep, usec * 1000UL); + struct timespec ts; + + if (usec > 999999) { + ts.tv_sec = usec / 1000000; + ts.tv_nsec = usec % 1000000; + } else { + ts.tv_sec = 0; + ts.tv_nsec = usec; + } + return nanosleep(&ts, NULL); } static bool should_run(struct test_selector *sel, int num, const char *name)
nanosleep syscall expects pointer to struct timespec, not nanoseconds directly. Current implementation fulfills its purpose of invoking nanosleep syscall, but doesn't really provide sleeping capabilities, which can cause flakiness for tests relying on usleep() to wait for something. Fixes: ec12a57b822c ("selftests/bpf: Guarantee that useep() calls nanosleep() syscall") Signed-off-by: Andrii Nakryiko <andriin@fb.com> --- tools/testing/selftests/bpf/test_progs.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)