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    SubjectRe: [PATCH v3 0/5] lib/find: add find_nth_bit()
    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

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