On Tue, 2019-09-17 at 09:59 +0200, Sebastian Andrzej Siewior wrote: > On 2019-09-11 17:57:27 [+0100], Scott Wood wrote: > > diff --git a/kernel/cpu.c b/kernel/cpu.c > > index 885a195dfbe0..32c6175b63b6 100644 > > --- a/kernel/cpu.c > > +++ b/kernel/cpu.c > > @@ -308,7 +308,9 @@ void pin_current_cpu(void) > > preempt_lazy_enable(); > > preempt_enable(); > > > > + rt_invol_sleep_inc(); > > __read_rt_lock(cpuhp_pin); > > + rt_invol_sleep_dec(); > > > > preempt_disable(); > > preempt_lazy_disable(); > > I understand the other one. But now looking at it, both end up in > rt_spin_lock_slowlock_locked() which would be the proper place to do > that annotation. Okay. FWIW, if my lazy migrate patchset is accepted, then there will be no users of __read_rt_lock() outside rwlock-rt.c and it'll be moot. -Scott
