# \[PATCH 0/2\] arch: enable GENERIC\_FIND\_FIRST\_BIT for MIPS and ARM64

- From: Yury Norov \<yury.norov@gmail.com\>
- Date: 2021-02-25 13:58:14 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2021/02/6278890
- Thread: https://ratatoskr.run/linux-arm-kernel/2021/02/6278890/t.md

```text
MIPS and ARM64 don't implement find_first_{zero}_bit in arch code and
don't enable it in config. It leads to using find_next_bit() which is
less efficient:

It's beneficial to enable GENERIC_FIND_FIRST_BIT as this functionality
is not new at all and well-tested. It provides more optimized code and
saves .text memory:

Alexander Lobakin (1):
  MIPS: enable GENERIC_FIND_FIRST_BIT

Yury Norov (1):
  arm64: enable GENERIC_FIND_FIRST_BIT

 arch/arm64/Kconfig | 1 +
 arch/mips/Kconfig  | 1 +
 2 files changed, 2 insertions(+)

-- 
2.25.1


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