* [PATCH AUTOSEL 5.4 1/7] powerpc/selftests: Use timersub() for gettimeofday()
@ 2022-10-14 13:53 Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2022-10-14 13:53 UTC (permalink / raw)
To: linux-kernel, stable
Cc: ye xingchen, Zeal Robot, Michael Ellerman, Sasha Levin, shuah,
linuxppc-dev, linux-kselftest
From: ye xingchen <ye.xingchen@zte.com.cn>
[ Upstream commit c814bf958926ff45a9c1e899bd001006ab6cfbae ]
Use timersub() function to simplify the code.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220816105106.82666-1-ye.xingchen@zte.com.cn
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
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2022-10-14 13:56 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-10-14 13:53 [PATCH AUTOSEL 5.4 1/7] powerpc/selftests: Use timersub() for gettimeofday() Sasha Levin
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).