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

Most active threads (last 7 days)

• HOTtoday [PATCH v9 00/16] KVM: arm64: PMU: Use multiple host PMUs
  2026-07-20 05:39 · 1 reply in 7d · Akihiko Odaki <hidden>

Recent patches

Most-recent 30 patches in this subsystem on linux-arm-kernel (capped at 30), ordered by date desc.

• HOTtoday [PATCH v9 07/16] tools headers: Use u* types for bitfield helpers
  2026-07-20 · Akihiko Odaki <hidden>
• COOLING6d [PATCH v8 02/11] tools headers: Sync bitfield.h with the kernel
  2026-07-10 · Akihiko Odaki <hidden>
• COOLING11d [PATCH 5/5] bitmap: Return size when no zero area is found
  2026-07-09 · Yury Norov <hidden>
• STALE138d [PATCH 12/12] bitmap: drop bitmap_print_to_pagebuf()
  2026-02-19 · Yury Norov <hidden>
• STALE138d [PATCH 11/12] cpumask: switch cpumap_print_to_pagebuf() to using scnprintf()
  2026-02-19 · Yury Norov <hidden>
• STALE138d [PATCH 07/12] mm: add rest_of_page() macro
  2026-02-19 · Yury Norov <hidden>
• STALE138d [PATCH 06/12] bitmap: align test_bitmap output
  2026-02-19 · Yury Norov <hidden>
• STALE138d [PATCH 05/12] bitmap: switch test to scnprintf("%*pbl")
  2026-02-19 · Yury Norov <hidden>
• STALE232d [PATCH v4 7/9] include: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-uapi headers
  2025-11-21 · Thomas Huth <hidden>
• STALE255d [PATCH 12/21] bitmap: don't use GENMASK()
  2025-10-25 · "Yury Norov (NVIDIA)" <yury.norov@gmail.com>
• STALE255d [PATCH 09/21] bits: generalize BITMAP_{FIRST,LAST}_WORD_MASK
  2025-10-25 · "Yury Norov (NVIDIA)" <yury.norov@gmail.com>
• STALE275d Re: [PATCH treewide v3 2/4] bitfield: Add non-constant field_{prep,get}() helpers
  2025-10-17 · Jakub Kicinski <kuba@kernel.org>
• STALE375d [PATCH v2 2/2] bitfield: Ensure the return values of helper functions are checked
  2025-07-09 · Ben Horgan <ben.horgan@arm.com>
• STALE376d [PATCH 2/2] bitfield: Ensure the return value of type##_replace_bits() is checked
  2025-07-03 · Ben Horgan <ben.horgan@arm.com>
• STALE377d [PATCH v2 2/3] bits: unify the non-asm GENMASK*()
  2025-06-09 · Vincent Mailhol via B4 Relay <devnull+mailhol.vincent.wanadoo.fr@kernel.org>
• STALE377d REVIEWED: 1 (0M) [PATCH v2 1/3] bits: split the definition of the asm and non-asm GENMASK*()
  2025-06-09 · Vincent Mailhol via B4 Relay <devnull+mailhol.vincent.wanadoo.fr@kernel.org>
• STALE329d [PATCH v2 3/7] bitfield: introduce HI16_WE bitfield prep macros
  2025-06-02 · Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
• STALE426d [PATCH v3 1/6] bitfield: Add FIELD_MODIFY() helper
  2025-04-17 · Luo Jie <hidden>
• STALE480d REVIEWED: 1 (0M) [PATCH v8 3/6] bits: introduce fixed-type BIT_U*()
  2025-03-25 · Vincent Mailhol via B4 Relay <devnull+mailhol.vincent.wanadoo.fr@kernel.org>
• STALE480d [PATCH v8 1/6] bits: add comments and newlines to #if, #else and #endif directives
  2025-03-25 · Vincent Mailhol via B4 Relay <devnull+mailhol.vincent.wanadoo.fr@kernel.org>
• STALE480d REVIEWED: 1 (0M) [PATCH v8 2/6] bits: introduce fixed-type GENMASK_U*()
  2025-03-25 · Vincent Mailhol via B4 Relay <devnull+mailhol.vincent.wanadoo.fr@kernel.org>
• STALE275d Re: [PATCH treewide v3 2/4] bitfield: Add non-constant field_{prep,get}() helpers
  2025-02-14 · Jakub Kicinski <kuba@kernel.org>
• STALE275d [PATCH v3 1/4] bitfield: Drop underscores from macro parameters
  2025-02-14 · Geert Uytterhoeven <geert+renesas@glider.be>
• STALE275d REVIEWED: 6 (6M) [PATCH treewide v3 2/4] bitfield: Add non-constant field_{prep,get}() helpers
  2025-02-14 · Geert Uytterhoeven <geert+renesas@glider.be>
• STALE520d Re: [PATCH treewide v2 1/3] bitfield: Add non-constant field_{prep,get}() helpers
  2025-02-02 · Vincent Mailhol <hidden>
• STALE520d [PATCH treewide v2 1/3] bitfield: Add non-constant field_{prep,get}() helpers
  2025-01-31 · Geert Uytterhoeven <geert+renesas@glider.be>
• STALE587d [PATCH 04/10] linux/bits.h: simplify GENMASK_INPUT_CHECK() by using is_const_true()
  2024-12-02 · Vincent Mailhol via B4 Relay <devnull+mailhol.vincent.wanadoo.fr@kernel.org>
• STALE590d [RFC PATCH v1 30/57] drivers/base: Remove PAGE_SIZE compile-time constant assumption
  2024-10-14 · Ryan Roberts <ryan.roberts@arm.com>
• STALE710d [PATCH] cpumask: Fix crash on updating CPU enabled mask
  2024-08-08 · Gavin Shan <hidden>
• STALE740d LANDED: 5 (0M) [PATCH v10 19/19] cpumask: Add enabled cpumask for present CPUs that can be brought online
  2024-05-29 · Jonathan Cameron <Jonathan.Cameron@huawei.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.

• STALE138d [PATCH 05/12] bitmap: switch test to scnprintf("%*pbl")
  2026-02-19 · Yury Norov <hidden>
• STALE138d [PATCH 06/12] bitmap: align test_bitmap output
  2026-02-19 · Yury Norov <hidden>
• STALE138d [PATCH 07/12] mm: add rest_of_page() macro
  2026-02-19 · Yury Norov <hidden>
• STALE138d [PATCH 11/12] cpumask: switch cpumap_print_to_pagebuf() to using scnprintf()
  2026-02-19 · Yury Norov <hidden>
• STALE138d [PATCH 12/12] bitmap: drop bitmap_print_to_pagebuf()
  2026-02-19 · Yury Norov <hidden>