On Tue, Mar 26, 2019 at 10:43:45AM +0100, Lukas Wunner wrote: > On Tue, Mar 26, 2019 at 12:14:22PM +0900, William Breathitt Gray wrote: > > On Mon, Mar 25, 2019 at 10:38:54AM +0100, Lukas Wunner wrote: > > Is this the sort of implementation you had in mind: > > > > offset = find_next_bit(addr, size, offset); > > if (offset == size) > > return size; > > > > offset -= offset % 8; > > *clump = bitmap_get_value8(addr, size, offset); > > > > return offset; > > Almost. I'd use round_down() instead of "offset -= offset % 8". > Then it's just a single cheap logical and operation at runtime. > I'd try to avoid copying around the clump value and use a pointer > to u8 instead. u8 might be inconvenient in environment where everything else is type of unsigned long. -- With Best Regards, Andy Shevchenko
