Re: [RFC][PATCH] time: Add warning about imminent deprecation of CONFIG_GENERIC_TIME_VSYSCALL_OLD

[Michael Ellerman]

John Stultz <john.stultz@xxxxxxxxxx> writes:

> CONFIG_GENERIC_TIME_VSYSCALL_OLD was introduced five years ago
> to allow a transition from the old vsyscall implementations to
> the new method (which simplified internal accounting and made
> timekeeping more precise).

I'm sure it's completely obvious to everyone except me what needs to be
done, but can you spell it out for me? Keeping in mind that I don't know
anything about the time keeping code.

> However, PPC and IA64 have yet to make the transition, despite
> in some cases me sending test patches to try to help it along.
>
> http://patches.linaro.org/patch/30501/
> http://patches.linaro.org/patch/35412/

I've never seen a PPC patch, did you send one?

> If its helpful, my last pass at the patches can be found here:
> https://git.linaro.org/people/john.stultz/linux.git dev/oldvsyscall-cleanup

Looks like it's just a draft for PPC. Do you think that should work and
it just needs testing? The comment about the vdso being "slightly
behind" is a little concerning.

cheers