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SubjectRe: [PATCH 2/2] time: Cleanup offs_real/wall_to_mono and offs_boot/total_sleep_time updates

* John Stultz <john.stultz@linaro.org> wrote:

> On 07/19/2012 02:33 AM, Ingo Molnar wrote:
> >* John Stultz <john.stultz@linaro.org> wrote:
> >
> >>+static void tk_set_sleep_time(struct timekeeper *tk, struct timespec t)
> >>+{
> >>+ /* Verify consistency before modifying */
> >>+ WARN_ON_ONCE(tk->offs_boot.tv64 !=
> >>+ timespec_to_ktime(tk->total_sleep_time).tv64);
> >asserts like this can be put into a single line - we rarely need
> >to read them if they don't trigger - and making them
> >non-intrusive oneliners is a bonus.
>
> Ack.
>
> >> @@ -456,8 +478,8 @@ int timekeeping_inject_offset(struct timespec *ts)
> >> tk_xtime_add(&timekeeper, ts);
> >>- timekeeper.wall_to_monotonic =
> >>- timespec_sub(timekeeper.wall_to_monotonic, *ts);
> >>+ tk_set_wall_to_mono(&timekeeper,
> >>+ timespec_sub(timekeeper.wall_to_monotonic, *ts));
> >There's a *lot* of unnecessary ugliness here and in many other
> >places in kernel/time/ due to repeating patterns of
> >"timekeeper.", which gets repeated many times and blows up line
> >length.
> >
> >Please add this to the highest level (system call, irq handler,
> >etc.) code:
> >
> > struct timekeeper *tk = &timekeeper;
> >
> >and pass that down to lower levels. The tk-> pattern will be the
> >obvious thing to type in typical time handling functions.
> >
> >This increases readability and clarifies the data flow and might
> >bring other advantages in the future.
>
> Sounds good. Are you ok if this is done in a follow-on patch?

Yeah, sure - the code is going in the right direction in
general, so no hurry.

Thanks,

Ingo


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