Re: [PATCH 7/8] lib: add fast path for find_next_*_bit()

Andy Shevchenko
2021-02-01T13:51:31Z

On Sat, Jan 30, 2021 at 11:17:18AM -0800, Yury Norov wrote:
> Similarly to bitmap functions, find_next_*_bit() users will benefit
> if we'll handle a case of bitmaps that fit into a single word. In the
> very best case, the compiler may replace a function call with a
> single ffs or ffz instruction.

Would be nice to have the examples how it reduces the actual code size (based
on the existing code in kernel, especially in widely used frameworks /
subsystems, like PCI).

--
With Best Regards,
Andy Shevchenko