linux-kernel - [PATCH 0/2] arch: enable GENERIC_FIND_FIRST

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Date:   Thu, 25 Feb 2021 05:56:58 -0800
From:   Yury Norov <yury.norov@...il.com>
To:     Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Alexander Lobakin <alobakin@...me>,
        Alexey Klimov <aklimov@...hat.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-mips@...r.kernel.org
Cc:     Yury Norov <yury.norov@...il.com>
Subject: [PATCH 0/2] arch: enable GENERIC_FIND_FIRST_BIT for MIPS and ARM64

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