* Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> wrote:
> - raw_spin_lock_irqsave(&rnp->lock, flags);
> - rnp->wakemask |= rdp->grpmask;
> - raw_spin_unlock_irqrestore(&rnp->lock, flags);
> + do {
> + old = rnp->wakemask;
> + new = old | rdp->grpmask;
> + } while (cmpxchg(&rnp->wakemask, old, new) != old);
Hm, isnt this an inferior version of atomic_or_long() in essence?
Note that atomic_or_long() is x86 only, so a generic one would have to be
offered too i suspect, atomic_cmpxchg() driven or so - which would look like
the above loop.
Most architectures could offer atomic_or_long() i suspect.
Thanks,
Ingo
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