bitmap api · Maintained

Maintainers

• M Yury Norov <yury.norov@gmail.com>
• R Rasmus Villemoes <linux@rasmusvillemoes.dk>

Paths

• F include/linux/bitfield.h
• F include/linux/bitmap-str.h
• F include/linux/bitmap.h
• F include/linux/bits.h
• F include/linux/cpumask.h
• F include/linux/cpumask_types.h
• F include/linux/find.h
• F include/linux/hw_bitfield.h
• F include/linux/nodemask.h
• F include/linux/nodemask_types.h
• F include/uapi/linux/bits.h
• F include/vdso/bits.h
• F lib/bitmap-str.c
• F lib/bitmap.c
• F lib/cpumask.c
• F lib/find_bit.c
• F lib/find_bit_benchmark.c
• F lib/test_bitmap.c
• F lib/tests/cpumask_kunit.c
• F tools/include/linux/bitfield.h
• F tools/include/linux/bitmap.h
• F tools/include/linux/bits.h
• F tools/include/linux/find.h
• F tools/include/uapi/linux/bits.h
• F tools/include/vdso/bits.h
• F tools/lib/bitmap.c
• F tools/lib/find_bit.c

Last 30 days

Active reviewers (last 30 days)

• Alexandre Belloni <alexandre.belloni@bootlin.com>
  1 attestation (1 Acked-by) · last on 2026-06-29
• Jonathan Cameron <Jonathan.Cameron@huawei.com>
  1 attestation (1 Acked-by) · last on 2026-06-29
• Crt Mori <cmo@melexis.com>
  1 attestation (1 Acked-by) · last on 2026-06-29
• Nuno Sá <nuno.sa@analog.com>
  1 attestation (1 Acked-by) · last on 2026-06-29
• Richard Genoud <richard.genoud@bootlin.com>
  1 attestation (1 Acked-by) · last on 2026-06-29
• Andy Shevchenko <hidden>
  1 attestation (1 Reviewed-by) · last on 2026-06-29
• Yury Norov (NVIDIA) <yury.norov@gmail.com>
  1 attestation (1 Reviewed-by) · last on 2026-06-29

Recent patches

Most-recent 17 patches in this subsystem on cip-dev, ordered by date desc.

• WARM3d REVIEWED: 45 (44M) [PATCH 6.12.y-cip 02/11] bitfield: Add non-constant field_{prep,get}() helpers
  2026-06-29 · Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
• WARM3d [PATCH 6.12.y-cip 01/11] bitfield: Add less-checking __FIELD_{GET,PREP}()
  2026-06-29 · Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
• COLD45d [PATCH 6.12.y-cip] PCI: rzg3s-host: Revert generic field helpers, use a local field_prep()
  2026-05-25 · John Madieu <john.madieu.xa@bp.renesas.com>
• COLD45d [PATCH 6.1.y-cip] PCI: rzg3s-host: Revert generic field helpers, use a local field_prep()
  2026-05-25 · John Madieu <john.madieu.xa@bp.renesas.com>
• COLD48d REVIEWED: 45 (44M) [PATCH 6.1.y-cip 03/17] bitfield: Add non-constant field_{prep,get}() helpers
  2026-05-14 · John Madieu <john.madieu.xa@bp.renesas.com>
• COLD48d [PATCH 6.1.y-cip 02/17] bitfield: Add less-checking __FIELD_{GET,PREP}()
  2026-05-14 · John Madieu <john.madieu.xa@bp.renesas.com>
• COLD48d [PATCH 6.12.y-cip 02/17] bitfield: Add less-checking __FIELD_{GET,PREP}()
  2026-05-14 · John Madieu <john.madieu.xa@bp.renesas.com>
• COLD48d REVIEWED: 45 (44M) [PATCH 6.12.y-cip 03/17] bitfield: Add non-constant field_{prep,get}() helpers
  2026-05-14 · John Madieu <john.madieu.xa@bp.renesas.com>
• STALE99d [PATCH 6.1.y-cip 21/39] bitfield: Add FIELD_MODIFY() helper
  2026-03-17 · Biju <hidden>
• STALE120d REVIEWED: 15 (15M) [PATCH 6.1.y-cip 02/17] lib/bitmap: add bitmap_{read,write}()
  2026-03-11 · Claudiu <claudiu.beznea@tuxon.dev>
• STALE106d REVIEWED: 15 (15M) [PATCH 5.10.y-cip 07/28] lib/bitmap: add bitmap_{read,write}()
  2026-03-11 · Claudiu <claudiu.beznea@tuxon.dev>
• STALE120d [PATCH 6.12.y-cip 28/29] bitfield: Add FIELD_MODIFY() helper
  2026-03-09 · Biju <hidden>
• STALE121d [PATCH 6.12.y-cip 05/11] bitfield: Add FIELD_MODIFY() helper
  2026-03-03 · Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
• STALE758d [PATCH 6.1.y-cip 02/17] bitfield: add FIELD_PREP_CONST()
  2024-06-07 · Claudiu <claudiu.beznea@tuxon.dev>
• STALE758d [PATCH 5.10.y-cip 02/19] bitfield: add FIELD_PREP_CONST()
  2024-06-07 · Claudiu <claudiu.beznea@tuxon.dev>
• STALE1452d [PATCH RESEND 5.10.y-cip 01/13] kernel.h: split out mathematical helpers
  2022-07-15 · Biju Das <biju.das.jz@bp.renesas.com>
• STALE1456d [PATCH [5.10.y-cip] 01/13] kernel.h: split out mathematical helpers
  2022-07-14 · Biju Das <biju.das.jz@bp.renesas.com>

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE121d [PATCH 6.12.y-cip 05/11] bitfield: Add FIELD_MODIFY() helper
  2026-03-03 · Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com>
• STALE120d [PATCH 6.12.y-cip 28/29] bitfield: Add FIELD_MODIFY() helper
  2026-03-09 · Biju <hidden>
• STALE99d [PATCH 6.1.y-cip 21/39] bitfield: Add FIELD_MODIFY() helper
  2026-03-17 · Biju <hidden>
• COLD48d [PATCH 6.12.y-cip 02/17] bitfield: Add less-checking __FIELD_{GET,PREP}()
  2026-05-14 · John Madieu <john.madieu.xa@bp.renesas.com>
• COLD48d [PATCH 6.1.y-cip 02/17] bitfield: Add less-checking __FIELD_{GET,PREP}()
  2026-05-14 · John Madieu <john.madieu.xa@bp.renesas.com>