[PATCH AUTOSEL 5.19 02/10] powerpc/selftests: Use timersub() for gettimeofday()
From: Sasha Levin <sashal@kernel.org>
Date: 2022-10-14 13:53:25
Also in:
linux-kselftest, lkml, stable
Subsystem:
kernel selftest framework, the rest · Maintainers:
Shuah Khan, Shuah Khan, Linus Torvalds
From: ye xingchen <redacted> [ Upstream commit c814bf958926ff45a9c1e899bd001006ab6cfbae ] Use timersub() function to simplify the code. Reported-by: Zeal Robot <redacted> Signed-off-by: ye xingchen <redacted> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220816105106.82666-1-ye.xingchen@zte.com.cn (local) Signed-off-by: Sasha Levin <sashal@kernel.org> --- tools/testing/selftests/powerpc/benchmarks/gettimeofday.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c b/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c
index 6b415683357b..580fcac0a09f 100644
--- a/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c
+++ b/tools/testing/selftests/powerpc/benchmarks/gettimeofday.c@@ -12,7 +12,7 @@ static int test_gettimeofday(void) { int i; - struct timeval tv_start, tv_end; + struct timeval tv_start, tv_end, tv_diff; gettimeofday(&tv_start, NULL);
@@ -20,7 +20,9 @@ static int test_gettimeofday(void) gettimeofday(&tv_end, NULL); } - printf("time = %.6f\n", tv_end.tv_sec - tv_start.tv_sec + (tv_end.tv_usec - tv_start.tv_usec) * 1e-6); + timersub(&tv_start, &tv_end, &tv_diff); + + printf("time = %.6f\n", tv_diff.tv_sec + (tv_diff.tv_usec) * 1e-6); return 0; }
--
2.35.1