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)

• DORMANTno replies [PATCH v2] nodemask: reduce bitmap width to nr_node_ids in __nodemask_pr_numnodes()
  2026-07-13 07:51 · 0 replies in 7d · lirongqing <hidden>
• HOTtoday [PATCH v8 00/11] KVM: arm64: PMU: Use multiple host PMUs
  2026-07-10 11:15 · 1 reply in 7d · Akihiko Odaki <hidden>
• HOTtoday [PATCH v7 00/12] sched, steal_monitor: Introduce cpu_preferred_mask and steal-driven vCPU backoff
  2026-07-09 21:57 · 1 reply in 7d · Shrikanth Hegde <hidden>
• COOLING4d [PATCH] bitmap: Properly initialise destination bitmap for scatter & gather test
  2026-07-09 11:40 · 0 replies in 7d · "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
• HOTtoday [PATCH] nodemask: use nr_node_ids instead of MAX_NUMNODES in __nodemask_pr_numnodes()
  2026-07-09 07:17 · 0 replies in 7d · lirongqing <hidden>
• COOLING4d [PATCH 0/5] bitmap: align bitmap_find_next_zero_area_off() output with the rest of the API
  2026-07-09 02:03 · 1 reply in 7d · Yury Norov <hidden>
• COOLING5d test_bitmap fails on ppc/ppc64 on kernels v7.1.3, v7.2-rc2
  2026-07-08 07:51 · 1 reply in 7d · Erhard Furtner <hidden>

Active reviewers (last 30 days)

• Yury Norov <yury.norov@gmail.com>
  4 attestations (4 Co-developed-by) · last on 2026-07-06
• Erhard Furtner <hidden>
  1 attestation (1 Reported-by) · last on 2026-07-09

Recent patches

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

• DORMANTno replies [PATCH v2] nodemask: reduce bitmap width to nr_node_ids in __nodemask_pr_numnodes()
  2026-07-13 · lirongqing <hidden>
• HOTtoday [PATCH v8 02/11] tools headers: Sync bitfield.h with the kernel
  2026-07-10 · Akihiko Odaki <hidden>
• HOTtoday [PATCH v7 02/12] cpumask: Introduce cpu_preferred_mask
  2026-07-09 · Shrikanth Hegde <hidden>
• COOLING4d [PATCH] bitmap: Properly initialise destination bitmap for scatter & gather test
  2026-07-09 · "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
• HOTtoday [PATCH] nodemask: use nr_node_ids instead of MAX_NUMNODES in __nodemask_pr_numnodes()
  2026-07-09 · lirongqing <hidden>
• COOLING4d [PATCH 5/5] bitmap: Return size when no zero area is found
  2026-07-09 · Yury Norov <hidden>
• COOLING5d Re: test_bitmap fails on ppc/ppc64 on kernels v7.1.3, v7.2-rc2
  2026-07-08 · "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>
• DORMANTno replies [PATCH v9 2/2] lib: bitmap: optimize bitmap_find_next_zero_area_off()
  2026-07-06 · sunyi <hidden>
• DORMANTno replies [PATCH v9 1/2] lib: bitmap: add tests for bitmap_find_next_zero_area_off()
  2026-07-06 · sunyi <hidden>
• COOLING6d [PATCH v2 11/11] lib/bitmap-str: get rid of cpumap_print_to_pagebuf()
  2026-07-02 · Yury Norov <hidden>
• COOLING11d [PATCH 4/4] mm/page_alloc: initialize node_possible_map like the other node maps
  2026-07-01 · Sang-Heon Jeon <hidden>
• COOLING4d [PATCH v3 05/11] bitmap: Add bitmap_allocate() function
  2026-07-01 · Thierry Reding <thierry.reding@kernel.org>
• COOLING4d [PATCH v6 03/23] cpumask: Introduce cpu_preferred_mask
  2026-07-01 · Shrikanth Hegde <hidden>
• COOLING13d [PATCH v5 04/24] cpumask: Introduce cpu_preferred_mask
  2026-06-25 · Shrikanth Hegde <hidden>
• DORMANTno replies [PATCH v8 2/2] lib: bitmap: optimize bitmap_find_next_zero_area_off()
  2026-06-22 · Yi Sun <hidden>
• COLD21d [PATCH v8 1/2] lib: bitmap: add tests for bitmap_find_next_zero_area_off()
  2026-06-22 · Yi Sun <hidden>
• COOLING8d [PATCH v7 2/2] lib: bitmap: optimize bitmap_find_next_zero_area_off()
  2026-06-22 · Yi Sun <hidden>
• COOLING8d [PATCH v7 1/2] lib: bitmap: add tests for bitmap_find_next_zero_area_off()
  2026-06-22 · Yi Sun <hidden>
• COLD24d [PATCH] bitmap: Replace __ASSEMBLY__ with __ASSEMBLER__ in header files
  2026-06-19 · Thomas Huth <hidden>
• COLD25d [PATCH v6 2/2] lib: bitmap: optimize bitmap_find_next_zero_area_off()
  2026-06-18 · Yi Sun <hidden>
• COLD25d [PATCH v6 1/2] lib: bitmap: add tests for bitmap_find_next_zero_area_off()
  2026-06-18 · Yi Sun <hidden>
• COLD24d Re: [PATCH v4 04/20] cpumask: Introduce cpu_preferred_mask
  2026-06-18 · Shrikanth Hegde <hidden>
• COLD24d [PATCH v5 2/2] lib: bitmap: optimize bitmap_find_next_zero_area_off()
  2026-06-18 · Yi Sun <hidden>
• COLD24d [PATCH v5 1/2] lib: bitmap: add tests for bitmap_find_next_zero_area_off()
  2026-06-18 · Yi Sun <hidden>
• COLD24d [PATCH v4 04/20] cpumask: Introduce cpu_preferred_mask
  2026-06-17 · Shrikanth Hegde <hidden>
• DORMANTno replies [PATCH] bitmap: drop bitmap_next_set_region()
  2026-06-09 · Yury Norov <yury.norov@gmail.com>
• COLD26d [PATCH v4 1/2] lib: bitmap: reduce the number of goto again in bitmap_find_next_zero_area_off()
  2026-06-01 · Yi Sun <hidden>
• COLD26d [PATCH v4 2/2] lib/bitmap: add tests for bitmap_find_next_zero_area_off()
  2026-06-01 · Yi Sun <hidden>
• COLD42d IN MM [PATCH] mm/nodemask: Correctly describe nodemask operation return types
  2026-05-29 · Joshua Hahn <joshua.hahnjy@gmail.com>
• COLD16d [PATCH 16/16] lib/bitmap-str: get rid of cpumap_print_to_pagebuf()
  2026-05-28 · Yury Norov <hidden>

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.

• DORMANTno replies [PATCH v2 1/1] linux/bitfield.h: replace __auto_type with auto
  2025-12-17 · "H. Peter Anvin" <hpa@zytor.com>
• STALE202d [PATCH v2 1/3] test_bitmap: extract benchmark module
  2025-12-22 · Tamir Duberstein <tamird@kernel.org>
• STALE121d [PATCH v2 1/2] bitmap: add bitmap_weight_from()
  2025-12-22 · "Yury Norov (NVIDIA)" <yury.norov@gmail.com>
• STALE138d [PATCH 1/3] bitmap: introduce bitmap_weighted_xor()
  2025-12-23 · "Yury Norov (NVIDIA)" <yury.norov@gmail.com>
• STALE174d [PATCH 03/12] tools: bitmap: add missing bitmap_[subset(), andnot()]
  2026-01-19 · Lorenzo Stoakes <hidden>
• STALE172d [PATCH RESEND 03/12] tools: bitmap: add missing bitmap_[subset(), andnot()]
  2026-01-19 · Lorenzo Stoakes <hidden>
• DORMANTno replies [PATCH] lib/find_bit: fix uninitialized variable use in FIND_NTH_BIT
  2026-01-20 · Lee Yongjun <hidden>
• STALE154d [PATCH next 09/14] bits: Change BIT_U8/16() and GENMASK_U8/16() to have unsigned values
  2026-01-21 · <hidden>
• STALE132d [PATCH 05/12] bitmap: switch test to scnprintf("%*pbl")
  2026-02-19 · Yury Norov <hidden>
• STALE132d [PATCH 06/12] bitmap: align test_bitmap output
  2026-02-19 · Yury Norov <hidden>