On Thu, Dec 3, 2020 at 2:36 AM Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote: > > On Wed, Dec 02, 2020 at 09:26:05AM -0800, Yury Norov wrote: > > On Wed, Dec 2, 2020 at 3:50 AM Yun Levi <ppbuk5246@xxxxxxxxx> wrote: > > ... > > > I think this patch has some good catches. We definitely need to implement > > find_last_zero_bit(), as it is used by fs/ufs, and their local > > implementation is not optimal. > > Side note: speaking of performance, any plans to fix for_each_*_bit*() for > cases when the nbits is known to be <= BITS_PER_LONG? > > Now it makes an awful code generation (something like few hundred bytes of > code). > > -- > With Best Regards, > Andy Shevchenko > > > Side note: speaking of performance, any plans to fix for_each_*_bit*() for > cases when the nbits is known to be <= BITS_PER_LONG? Frankly Speaking, I don't have an idea in now..... Could you share your idea or wisdom? Thanks. Levi.
