[Yury Norov <ynorov@nvidia.com>]

Subject: [PATCH v2 0/5] lib: rework bitreverse

Cleanup bitreverse-related Kconfig dependency mechanism, and add new
GENERIC_BITREVERSE option to allow architectures to pick the generic
implementation as a fallback for the arch one.

Make RISCV to pick the generic implementation with the absence of ZBKB.

v1: https://lore.kernel.org/all/20260430211351.658193-1-ynorov@nvidia.com/
v2:
 - don't protect headers with the corresponding configs (Arnd, Erik);
 - make HAVE_ARCH_BITREVERSE conditional on BITREVERSE;
 - make GENERIC_BITREVERSE tri-state (sashiko);
 - re-implement GENERIC_BITREVERSE and it's relation to BITREVERSE and
   HAVE_ARCH_BITREVERSE, thus taking over the authorship;
 - RISCV: select GENERIC_BITREVERSE and HAVE_ARCH_BITREVERSE depending
   on BITREVERSE;

Jinjie Ruan (2):
  bitops: Define generic___bitrev8/16/32 for reuse
  arch/riscv: Add bitrev.h file to support rev8 and brev8

Yury Norov (3):
  arch: select HAVE_ARCH_BITREVERSE conditionally on BITREVERSE
  lib/bitrev: Introduce GENERIC_BITREVERSE
  MAINTAINERS: BITOPS: include bitrev.[ch]

 MAINTAINERS                           |  2 ++
 arch/arm/Kconfig                      |  2 +-
 arch/arm64/Kconfig                    |  2 +-
 arch/loongarch/Kconfig                |  2 +-
 arch/mips/Kconfig                     |  2 +-
 arch/riscv/Kconfig                    |  2 ++
 arch/riscv/include/asm/bitrev.h       | 51 +++++++++++++++++++++++++++
 include/asm-generic/bitops/__bitrev.h | 23 ++++++++++++
 include/linux/bitrev.h                | 20 +++--------
 lib/Kconfig                           | 13 +++++++
 lib/Makefile                          |  2 +-
 lib/bitrev.c                          |  3 --
 12 files changed, 100 insertions(+), 24 deletions(-)
 create mode 100644 arch/riscv/include/asm/bitrev.h
 create mode 100644 include/asm-generic/bitops/__bitrev.h

-- 
2.51.0