bitops api · Maintained

Maintainers

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

Paths

• F arch/*/include/asm/bitops.h
• F arch/*/include/asm/bitops_32.h
• F arch/*/include/asm/bitops_64.h
• F arch/*/lib/bitops.c
• F include/asm-generic/bitops
• F include/asm-generic/bitops.h
• F include/linux/bitops.h
• F include/linux/bitrev.h
• F include/linux/count_zeros.h
• F lib/bitrev.c
• F lib/hweight.c
• F lib/test_bitops.c
• F lib/tests/bitops_kunit.c
• F tools/*/bitops*

Last 30 days

Recent patches

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

• COOLING8d REVIEWED: 1 (0M) [PATCH v2 3/5] bitops: Define generic___bitrev8/16/32 for reuse
  2026-05-06 · Yury Norov <hidden>
• COOLING8d [PATCH v2 2/5] lib/bitrev: Introduce GENERIC_BITREVERSE
  2026-05-06 · Yury Norov <hidden>
• COLD42d [PATCH 5/6] lib: compile generic bitrev.c conditionally on GENERIC_BITREVERSE
  2026-04-30 · Yury Norov <hidden>
• COLD42d REVIEWED: 1 (0M) [PATCH 3/6] bitops: Define generic __bitrev8/16/32 for reuse
  2026-04-30 · Yury Norov <hidden>
• COLD42d [PATCH 2/6] lib/bitrev: Introduce GENERIC_BITREVERSE and cleanup Kconfig
  2026-04-30 · Yury Norov <hidden>
• COLD50d [PATCH 1/2] lib: compile generic bitrev.c conditionally on GENERIC_BITREVERSE
  2026-04-27 · Yury Norov <hidden>
• COLD48d [PATCH v5 1/3] lib/bitrev: Introduce GENERIC_BITREVERSE and cleanup Kconfig
  2026-04-21 · Jinjie Ruan <hidden>
• COLD48d REVIEWED: 1 (0M) [PATCH v5 2/3] bitops: Define generic __bitrev8/16/32 for reuse
  2026-04-21 · Jinjie Ruan <hidden>
• COLD57d REVIEWED: 1 (0M) [PATCH v4 1/2] bitops: Define generic __bitrev8/16/32 for reuse
  2026-04-20 · Jinjie Ruan <hidden>
• COLD58d REVIEWED: 1 (0M) [PATCH v3 1/2] bitops: Define generic __bitrev8/16/32 for reuse
  2026-04-17 · Jinjie Ruan <hidden>
• STALE61d [PATCH v2 1/2] bitops: Define generic __bitrev8/16/32 for reuse
  2026-04-15 · Jinjie Ruan <hidden>
• STALE71d [PATCH v1 1/1] bitops: Update kernel-doc for sign_extendXX()
  2026-04-07 · Andy Shevchenko <andriy.shevchenko@linux.intel.com>
• STALE86d [PATCH] lib: count_zeros: unify count_{leading,trailing}_zeros()
  2026-03-23 · Yury Norov <hidden>
• STALE91d [PATCH v2] bitops: fix kernel-doc parameter name for parity8()
  2026-03-15 · Kit Dallege <hidden>
• DORMANTno replies [PATCH 1/9] bitops: fix kernel-doc parameter name for parity8()
  2026-03-15 · Kit Dallege <hidden>
• STALE91d [PATCH] lib: count_zeros: fix 32/64-bit inconsistency in count_trailing_zeros()
  2026-03-12 · Yury Norov <hidden>
• STALE96d [PATCH v2] lib: crypto: fix comments for count_leading_zeros()
  2026-03-12 · Yury Norov <hidden>
• STALE63d [PATCH] arch/riscv: Add bitrev.h file to support rev8 and brev8
  2026-03-11 · Jinjie Ruan <hidden>
• STALE98d [PATCH] lib: crypto: fix comments for count_leading_zeros()
  2026-03-10 · Yury Norov <hidden>
• STALE141d [PATCH] lib/tests: extend KUnit test for bitops with more cases
  2026-01-22 · Ryota Sakamoto <hidden>
• STALE157d [PATCH v2] lib/tests: add KUnit test for bitops
  2026-01-10 · Ryota Sakamoto <hidden>
• STALE158d [PATCH] lib/tests: add KUnit test for bitops
  2026-01-09 · Ryota Sakamoto <hidden>
• STALE155d [RFC PATCH 1/2] bits: introduce ffs_val()
  2026-01-09 · Petr Tesarik <hidden>
• STALE223d [PATCH v1 2/2] bitops: Update kernel-doc in hweight.c to fix the issues with it
  2025-11-06 · Andy Shevchenko <andriy.shevchenko@linux.intel.com>
• DORMANTno replies Re: Linux 6.12.57
  2025-11-02 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• DORMANTno replies Re: Linux 6.6.116
  2025-11-02 · Greg Kroah-Hartman <gregkh@linuxfoundation.org>
• STALE241d LANDED [PATCH 02/17] bitops: Add __attribute_const__ to generic ffs()-family implementations
  2025-08-04 · Kees Cook <kees@kernel.org>
• STALE349d Re: [PATCH 2/2] bitops: rotate: Add riscv implementation using Zbb extension
  2025-06-30 · Yury Norov <yury.norov@gmail.com>
• STALE349d [PATCH 1/2] bitops: generic rotate
  2025-06-20 · <hidden>
• STALE417d [PATCH v4 01/13] bitops: Change parity8() to parity_odd() with u64 input and bool return type
  2025-04-09 · Kuan-Wei Chiu <visitorckw@gmail.com>

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.

• COOLING8d REVIEWED: 1 (0M) [PATCH v2 3/5] bitops: Define generic___bitrev8/16/32 for reuse
  2026-05-06 · Yury Norov <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.

• DORMANTno replies [PATCH 1/9] bitops: fix kernel-doc parameter name for parity8()
  2026-03-15 · Kit Dallege <hidden>
• COLD50d [PATCH 1/2] lib: compile generic bitrev.c conditionally on GENERIC_BITREVERSE
  2026-04-27 · Yury Norov <hidden>