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/region_alloc_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)

• Yury Norov <yury.norov@gmail.com>
  2 attestations (1 Reviewed-by, 1 Suggested-by) · last on 2026-09-28
• Fuad Tabba <fuad.tabba@linux.dev>
  2 attestations (2 Reviewed-by) · last on 2026-09-20

Recent patches

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

• COOLING11d IN LINUX-NEXT [PATCH v14 04/13] cpumask: Introduce cpu_preferred_mask
  2026-09-28 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COOLING11d IN LINUX-NEXT: 8 (8M) [PATCH v14 02/13] cpumask: Introduce cpumask_intersects_and
  2026-09-28 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD19d REVIEWED: 1 (1M) [PATCH v11 12/21] tools headers: Use u* types for bitfield helpers
  2026-09-20 · Akihiko Odaki <hidden>
• COLD27d REVIEWED: 1 (1M) [PATCH v10 11/20] tools headers: Use u* types for bitfield helpers
  2026-09-14 · Akihiko Odaki <hidden>
• COLD15d [PATCH v13 04/13] cpumask: Introduce cpu_preferred_mask
  2026-09-09 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD15d [PATCH v13 02/13] cpumask: Introduce cpumask_intersects_and
  2026-09-09 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD32d [PATCH v12 04/13] cpumask: Introduce cpu_preferred_mask
  2026-09-03 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD32d [PATCH v12 02/13] cpumask: Introduce cpumask_intersects_and
  2026-09-03 · Shrikanth Hegde <sshegde@linux.ibm.com>
• DORMANTno replies Re: [PATCH v11 05/12] sched/core: Try to use a preferred CPU in is_cpu_allowed
  2026-09-02 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD39d [PATCH v11 03/12] cpumask: Introduce cpu_preferred_mask
  2026-08-25 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD44d [PATCH v10 03/12] cpumask: Introduce cpu_preferred_mask
  2026-08-12 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE61d [PATCH v9 02/11] cpumask: Introduce cpu_preferred_mask
  2026-07-24 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD15d [PATCH v5 04/36] numa: introduce N_MEMORY_PRIVATE
  2026-07-20 · Gregory Price <gourry@gourry.net>
• STALE81d [PATCH v8 02/11] cpumask: Introduce cpu_preferred_mask
  2026-07-20 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE73d [PATCH v9 07/16] tools headers: Use u* types for bitfield helpers
  2026-07-20 · Akihiko Odaki <hidden>
• STALE71d [PATCH v8 02/11] tools headers: Sync bitfield.h with the kernel
  2026-07-10 · Akihiko Odaki <hidden>
• STALE88d [PATCH v7 02/12] cpumask: Introduce cpu_preferred_mask
  2026-07-09 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE94d [PATCH v6 03/23] cpumask: Introduce cpu_preferred_mask
  2026-07-01 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE103d [PATCH v5 04/24] cpumask: Introduce cpu_preferred_mask
  2026-06-25 · Shrikanth Hegde <sshegde@linux.ibm.com>
• STALE268d [RFC PATCH v3 1/8] numa,memory_hotplug: create N_PRIVATE (Private Nodes)
  2026-01-08 · Gregory Price <gourry@gourry.net>
• STALE573d Re: [PATCH V2 1/2] cpumask: Fix kernel-doc formatting errors in cpumask.h
  2025-03-07 · Akira Yokosawa <akiyks@gmail.com>
• STALE573d [PATCH V2 1/2] cpumask: Fix kernel-doc formatting errors in cpumask.h
  2025-03-07 · Viresh Kumar <viresh.kumar@linaro.org>
• STALE631d [PATCH v2 1/2] hexdump: Convert the ascii boolean into a flag variable
  2025-01-10 · Miquel Raynal <miquel.raynal@bootlin.com>
• STALE655d [PATCH 1/2] hexdump: Convert the ascii boolean into a flag variable
  2024-08-26 · Miquel Raynal <miquel.raynal@bootlin.com>
• STALE895d LANDED [PATCH v13 4/4] cpumask: Add assign cpu
  2024-03-12 · Charlie Jenkins <hidden>
• STALE942d [PATCH v12 4/4] cpumask: Add assign cpu
  2024-03-12 · Charlie Jenkins <hidden>
• STALE942d [PATCH v11 4/4] cpumask: Add assign cpu
  2024-02-12 · Charlie Jenkins <hidden>
• STALE912d REVIEWED: 4 (0M) [PATCH RFC v4 15/15] cpumask: Add enabled cpumask for present CPUs that can be brought online
  2024-01-31 · Russell King (Oracle) <hidden>
• STALE985d REVIEWED: 3 (0M) [PATCH RFC v3 21/21] cpumask: Add enabled cpumask for present CPUs that can be brought online
  2023-12-13 · Russell King (Oracle) <hidden>
• STALE1033d [PATCH 38/39] cpumask: Add enabled cpumask for present CPUs that can be brought online
  2023-10-24 · Russell King (Oracle) <hidden>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• COLD27d REVIEWED: 1 (1M) [PATCH v10 11/20] tools headers: Use u* types for bitfield helpers
  2026-09-14 · Akihiko Odaki <hidden> · 1 Reviewed-by

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.

• STALE71d [PATCH v8 02/11] tools headers: Sync bitfield.h with the kernel
  2026-07-10 · Akihiko Odaki <hidden>
• STALE81d [PATCH v8 02/11] cpumask: Introduce cpu_preferred_mask
  2026-07-20 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD44d [PATCH v10 03/12] cpumask: Introduce cpu_preferred_mask
  2026-08-12 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD39d [PATCH v11 03/12] cpumask: Introduce cpu_preferred_mask
  2026-08-25 · Shrikanth Hegde <sshegde@linux.ibm.com>
• DORMANTno replies Re: [PATCH v11 05/12] sched/core: Try to use a preferred CPU in is_cpu_allowed
  2026-09-02 · Shrikanth Hegde <sshegde@linux.ibm.com>
• COLD32d [PATCH v12 04/13] cpumask: Introduce cpu_preferred_mask
  2026-09-03 · Shrikanth Hegde <sshegde@linux.ibm.com>