From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To: Yury Norov <yury.norov@gmail.com>
Cc: Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Alexander Lobakin <alobakin@pm.me>,
Alexey Klimov <aklimov@redhat.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-mips@vger.kernel.org
Subject: Re: [PATCH 2/2] MIPS: enable GENERIC_FIND_FIRST_BIT
Date: Mon, 1 Mar 2021 15:49:08 +0100 [thread overview]
Message-ID: <20210301144908.GC11261@alpha.franken.de> (raw)
In-Reply-To: <20210225135700.1381396-3-yury.norov@gmail.com>
On Thu, Feb 25, 2021 at 05:57:00AM -0800, Yury Norov wrote:
> From: Alexander Lobakin <alobakin@pm.me>
>
> MIPS doesn't have architecture-optimized bitsearching functions,
> like find_{first,next}_bit() etc.
> It's absolutely harmless to enable GENERIC_FIND_FIRST_BIT as this
> functionality is not new at all and well-tested. It provides more
> optimized code and saves some .text memory (32 R2):
>
> add/remove: 4/1 grow/shrink: 1/53 up/down: 216/-372 (-156)
>
> Users of for_each_set_bit() like hotpath gic_handle_shared_int()
> will also benefit from this.
>
> Suggested-by: Yury Norov <yury.norov@gmail.com>
> Signed-off-by: Alexander Lobakin <alobakin@pm.me>
> Signed-off-by: Yury Norov <yury.norov@gmail.com>
> ---
> arch/mips/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
applied to mips-next.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
next prev parent reply other threads:[~2021-03-01 15:06 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-25 13:56 [PATCH 0/2] arch: enable GENERIC_FIND_FIRST_BIT for MIPS and ARM64 Yury Norov
2021-02-25 13:56 ` [RESEND PATCH 1/2] ARM64: enable GENERIC_FIND_FIRST_BIT Yury Norov
2021-02-25 14:02 ` Will Deacon
2021-03-03 22:17 ` Yury Norov
2021-03-05 11:20 ` Catalin Marinas
2021-02-25 13:57 ` [PATCH 2/2] MIPS: " Yury Norov
2021-02-26 1:22 ` Huacai Chen
2021-02-26 4:07 ` Yury Norov
2021-03-01 14:49 ` Thomas Bogendoerfer [this message]
2021-03-15 19:14 ` (subset) [PATCH 0/2] arch: enable GENERIC_FIND_FIRST_BIT for MIPS and ARM64 Catalin Marinas
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