On Thu, Jan 21, 2021 at 2:18 AM Andy Shevchenko <[email protected]> wrote: > > On Wed, Jan 20, 2021 at 04:06:26PM -0800, Yury Norov wrote: > > In the following patches of the series they are used by > > find_bit subsystem. > > s/subsystem/API/ > > ... > > > --- a/include/linux/bitops.h > > +++ b/include/linux/bitops.h > > @@ -7,6 +7,17 @@ > > > > #include <uapi/linux/kernel.h> > > > > +#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - > > 1))) > > +#define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - > > 1))) > > Hmm... Naming here is not in the bitops namespace. > I would expect BITS rather than BITMAP for these two. > > So, we have at least the following options: > - split to a separate header, like bitmap_macros.h > - s/BITMAP/BITS/ and either define BITMAP_* as respective BITS_* or rename it > everywhere in bitmap.* > - your variant > - ...???...
We have GENMASK in linux/bits.h. I think we should use it here and drop local ones. It will also cover the case of OFFSET macro that you suggested in your comment to patch #5.
