On 12/14, Oleg Nesterov wrote: > > IOW, we must ensure that if ever clear TIF_NOTIFY_RESUME we must not > miss ->pending_attach, correct? and for this case we have mb() after > clear_thread_flag(). Perhaps instead we should add mb__after_clear_bit() > into arch/ hooks, but this needs a lot of arch-dependent changes.
Cough. And I always read this "rmb" as "mb". Even when I changed the comment to explain that we need a barrier between clear bit and read flags, I didn't notice it is in fact rmb... I guess we need the trivial fix, Roland? Oleg.
