Re: [PATCH v5 1/3] powerpc: Fix vDSO clock_getres()

[shuah <shuah@kernel.org>]

On 5/28/19 6:04 AM, Vincenzo Frascino wrote:
> clock_getres in the vDSO library has to preserve the same behaviour
> of posix_get_hrtimer_res().
> 
> In particular, posix_get_hrtimer_res() does:
>      sec = 0;
>      ns = hrtimer_resolution;
> and hrtimer_resolution depends on the enablement of the high
> resolution timers that can happen either at compile or at run time.
> 
> Fix the powerpc vdso implementation of clock_getres keeping a copy of
> hrtimer_resolution in vdso data and using that directly.
> 
> Fixes: a7f290dad32e ("[PATCH] powerpc: Merge vdso's and add vdso support
> to 32 bits kernel")
> Cc: stable@vger.kernel.org
> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Michael Ellerman <mpe@ellerman.id.au>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Reviewed-by: Christophe Leroy <christophe.leroy@c-s.fr>
> ---
> 
> Note: This patch is independent from the others in this series, hence it
> can be merged singularly by the powerpc maintainers.
> 

Acked-by: Shuah Khan <skhan@linuxfoundation.org>

thanks,
-- Shuah