On Sat, Jul 21, 2018 at 10:21:20AM -0700, Davidlohr Bueso wrote: > On Fri, 20 Jul 2018, Andrew Morton wrote: > > > We could open-code it locally. Add a couple of > > WARN_ON_ONCE(irqs_disabled())? That might need re-benchmarking with > > Xen but surely just reading the thing isn't too expensive? > > We could also pass on the responsibility to lockdep and just use > lockdep_assert_irqs_disabled(). But I guess that would be less effective > than to just open code it in epoll without lockdep -- note that over 80 > places in the kernel do this.
The lockdep thing is relatively recent. I think someone proposed to go replace a bunch of the open-coded ones at some point.
