Patch "powerpc/selftests: Use timersub() for gettimeofday()" has been added to the 6.0-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    powerpc/selftests: Use timersub() for gettimeofday()

to the 6.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     powerpc-selftests-use-timersub-for-gettimeofday.patch
and it can be found in the queue-6.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 8dec9501e43162a55dc5d4e1d3b68aadaf5ab847
Author: ye xingchen <ye.xingchen@xxxxxxxxxx>
Date:   Tue Aug 16 10:51:06 2022 +0000

    powerpc/selftests: Use timersub() for gettimeofday()
    
    [ Upstream commit c814bf958926ff45a9c1e899bd001006ab6cfbae ]
    
    Use timersub() function to simplify the code.
    
    Reported-by: Zeal Robot <zealci@xxxxxxxxxx>
    Signed-off-by: ye xingchen <ye.xingchen@xxxxxxxxxx>
    Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20220816105106.82666-1-ye.xingchen@xxxxxxxxxx
    Stable-dep-of: d21f4b7ffc22 ("pinctrl: qcom: Avoid glitching lines when we first mux to output")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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;
 }