OK, take in bitmap-for-next.
On Fri, Sep 23, 2022 at 09:18:44AM -0700, Yury Norov wrote:
> Ping?
>
> On Sat, Sep 17, 2022 at 08:07:10PM -0700, Yury Norov wrote:
> > Kernel lacks for a function that searches for Nth bit in a bitmap.
> > Usually people do it like this:
> > for_each_set_bit(bit, mask, size)
> > if (n-- == 0)
> > return bit;
> >
> > Which is not so elegant and very slow.
> >
> > This series adds fast routines for this task, and applies them where
> > appropriate.
> >
> > v1: https://lore.kernel.org/lkml/20220706182300.70862-4-yury.norov@gmail.com/T/
> > v2: https://lore.kernel.org/lkml/CAAH8bW_RYG_Tbpip=BkSFAymDm2y3jJBqTi0PJWA=H-a-L_3tg@mail.gmail.com/T/
> > v3:
> > - add bitmap_weight_and() and use it in cpumask_local_spread();
> > - rework find_nth_bit() family: similarly to [1], introduce
> > FIND_NTH_BIT(), and optimize the function to return earlier when
> > it's known that the rest of bitmap can't meet the requirement.
> > - patch "lib/nodemask: inline next_node_in() and node_random()" has
> > been merged, so drop it from this series.
> >
> > On top of:
> > [1] https://lore.kernel.org/lkml/20220915020730.852234-1-yury.norov@gmail.com/T/
> >
> > Yury Norov (6):
> > lib/bitmap: don't call __bitmap_weight() in kernel code
> > lib/bitmap: add bitmap_weight_and()
> > lib: add find_nth(,and,andnot)_bit()
> > lib/bitmap: add tests for find_nth_bit()
> > lib/bitmap: remove bitmap_ord_to_pos
> > cpumask: add cpumask_nth_{,and,andnot}
> >
> > fs/ntfs3/bitmap.c | 4 +-
> > include/linux/bitmap.h | 13 +++++-
> > include/linux/bitops.h | 19 +++++++++
> > include/linux/cpumask.h | 55 +++++++++++++++++++++++++
> > include/linux/find.h | 86 ++++++++++++++++++++++++++++++++++++++++
> > include/linux/nodemask.h | 3 +-
> > lib/bitmap.c | 68 ++++++++++++-------------------
> > lib/cpumask.c | 28 ++++++-------
> > lib/find_bit.c | 44 ++++++++++++++++++++
> > lib/find_bit_benchmark.c | 18 +++++++++
> > lib/test_bitmap.c | 47 +++++++++++++++++++++-
> > 11 files changed, 320 insertions(+), 65 deletions(-)
> >
> > --
> > 2.34.1