Hi, Yury,
On Thu, Feb 25, 2021 at 9:59 PM Yury Norov [off-list ref] wrote:
From: Alexander Lobakin <redacted>
MIPS doesn't have architecture-optimized bitsearching functions,
like find_{first,next}_bit() etc.
Emm, I think MIPS can use clo/clz to optimize bitsearching functions.
Huacai
quoted hunk ↗ jump to hunk
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(+)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index d89efba3d8a4..164bdd715d4b 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -26,6 +26,7 @@ config MIPS
select GENERIC_ATOMIC64 if !64BIT
select GENERIC_CMOS_UPDATE
select GENERIC_CPU_AUTOPROBE
+ select GENERIC_FIND_FIRST_BIT
select GENERIC_GETTIMEOFDAY
select GENERIC_IOMAP
select GENERIC_IRQ_PROBE
--2.25.1
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