Re: [PATCH 2/2] MIPS: enable GENERIC_FIND_FIRST_BIT

From
Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date
2021-03-01 15:06:41
Also in
linux-arch, linux-mips, lkml
Reply to
Yury Norov, 2021-02-25
On Thu, Feb 25, 2021 at 05:57:00AM -0800, Yury Norov wrote:
From: Alexander Lobakin <redacted>

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 <redacted>
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 ]

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Thread (10 messages) 10 messages, 5 authors, last reply 2021-03-15
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