Re: [PATCH v4 3/3] kselftest: Extend vDSO selftest to clock_getres

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Vincenzo Frascino <vincenzo.frascino@xxxxxxx> writes:

> The current version of the multiarch vDSO selftest verifies only
> gettimeofday.
>
> Extend the vDSO selftest to clock_getres, to verify that the
> syscall and the vDSO library function return the same information.
>
> The extension has been used to verify the hrtimer_resoltion fix.

This is passing for me even without patch 1 applied, shouldn't it fail
without the fix? What am I missing?

# uname -r
5.2.0-rc2-gcc-8.2.0

# ./vdso_clock_getres
clock_id: CLOCK_REALTIME [PASS]
clock_id: CLOCK_BOOTTIME [PASS]
clock_id: CLOCK_TAI [PASS]
clock_id: CLOCK_REALTIME_COARSE [PASS]
clock_id: CLOCK_MONOTONIC [PASS]
clock_id: CLOCK_MONOTONIC_RAW [PASS]
clock_id: CLOCK_MONOTONIC_COARSE [PASS]

cheers

> Cc: Shuah Khan <shuah@xxxxxxxxxx>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
> ---
>
> Note: This patch is independent from the others in this series, hence it
> can be merged singularly by the kselftest maintainers.
>
>  tools/testing/selftests/vDSO/Makefile         |   2 +
>  .../selftests/vDSO/vdso_clock_getres.c        | 124 ++++++++++++++++++
>  2 files changed, 126 insertions(+)
>  create mode 100644 tools/testing/selftests/vDSO/vdso_clock_getres.c



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