On Thu, Jul 29, 2021 at 11:56 AM Will Deacon <will@xxxxxxxxxx> wrote: > On Thu, Jul 29, 2021 at 05:30:03PM +0800, Rui Wang wrote: > > This patch introduce a new atomic primitive andnot_or: > > Please see my other comments on the other patches you posted: > > https://lore.kernel.org/r/20210729093923.GD21151@willie-the-truck > > Overall, I'm not thrilled to bits by extending the atomics API with > operations that cannot be implemented efficiently on any (?) architectures > and are only used by the qspinlock slowpath on machines with more than 16K > CPUs. Wouldn't this also help improve set_mask_bits()? That one at least has a handful of users in the kernel. Arnd
