diff options
| author | Yury Norov <yury.norov@gmail.com> | 2021-08-14 23:17:00 +0200 |
|---|---|---|
| committer | Yury Norov <yury.norov@gmail.com> | 2022-01-15 17:47:31 +0100 |
| commit | c126a53c276048125b4a950072bab37ad0fea120 (patch) | |
| tree | a6afa48b9c781a8558ff7cfec59c2f617fd43991 /arch/s390 | |
| parent | include: move find.h from asm_generic to linux (diff) | |
| download | linux-c126a53c276048125b4a950072bab37ad0fea120.tar.xz linux-c126a53c276048125b4a950072bab37ad0fea120.zip | |
arch: remove GENERIC_FIND_FIRST_BIT entirely
In 5.12 cycle we enabled GENERIC_FIND_FIRST_BIT config option for ARM64
and MIPS. It increased performance and shrunk .text size; and so far
I didn't receive any negative feedback on the change.
https://lore.kernel.org/linux-arch/20210225135700.1381396-1-yury.norov@gmail.com/
Now I think it's a good time to switch all architectures to use
find_{first,last}_bit() unconditionally, and so remove corresponding
config option.
The patch does't introduce functioal changes for arc, arm, arm64, mips,
m68k, s390 and x86, for other architectures I expect improvement both in
performance and .text size.
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Tested-by: Alexander Lobakin <alobakin@pm.me> (mips)
Reviewed-by: Alexander Lobakin <alobakin@pm.me> (mips)
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Will Deacon <will@kernel.org>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/Kconfig | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 2a5bb4f29cfe..4f80f1c95468 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -127,7 +127,6 @@ config S390 select GENERIC_CPU_AUTOPROBE select GENERIC_CPU_VULNERABILITIES select GENERIC_ENTRY - select GENERIC_FIND_FIRST_BIT select GENERIC_GETTIMEOFDAY select GENERIC_PTDUMP select GENERIC_SMP_IDLE_THREAD |