Re: [PATCH -rcu dev 1/3] rcu/tree: tick_dep_set/clear_cpu should accept bits instead of masks
From: Frederic Weisbecker
Date: Tue Aug 20 2019 - 08:08:50 EST
On Mon, Aug 19, 2019 at 09:44:20AM -0700, Paul E. McKenney wrote:
> On Mon, Aug 19, 2019 at 06:32:27PM +0200, Frederic Weisbecker wrote:
> > > But would the following patch make sense? This would not help for (say)
> > > use of TICK_MASK_BIT_POSIX_TIMER instead of TICK_DEP_BIT_POSIX_TIMER, but
> > > would help for any new values that might be added later on. And currently
> > > for TICK_DEP_MASK_CLOCK_UNSTABLE and TICK_DEP_MASK_RCU.
> > I'd rather make the TICK_DEP_MASK_* values private to kernel/time/tick-sched.c but
> > that means I need to re-arrange a bit include/trace/events/timer.h
> That would be even better! For one thing, it would detect misuse of
> -all- of the _MASK_ values. ;-)
> > I'm looking into it. Meanwhile, your below patch that checks for the max value is
> > still valuable.
> If I were to push it, it would be v5.5 before it showed up. My guess
> is therefore that I should keep it for my own internal use in the near
> term, but not push it. If you would like to take it, feel free to use
> my Signed-off-by.