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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-05-12 21:52:01 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-05-13 11:07:33 +0200 |
| commit | 409ca45526a428620d8efb362ccfd4b1e6b80642 (patch) | |
| tree | 661224b2fd02f0e2026bb1ee612738ddf2268031 | |
| parent | eccd906484d1cd4b5da00f093d678badb6f48f28 (diff) | |
| download | linux-409ca45526a428620d8efb362ccfd4b1e6b80642.tar.bz2 | |
x86/kconfig: Disable CONFIG_GENERIC_HWEIGHT and remove __HAVE_ARCH_SW_HWEIGHT
Remove an unnecessary arch complication:
arch/x86/include/asm/arch_hweight.h uses __sw_hweight{32,64} as
alternatives, and they are implemented in arch/x86/lib/hweight.S
x86 does not rely on the generic C implementation lib/hweight.c
at all, so CONFIG_GENERIC_HWEIGHT should be disabled.
__HAVE_ARCH_SW_HWEIGHT is not necessary either.
No change in functionality intended.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Uros Bizjak <ubizjak@gmail.com>
Link: http://lkml.kernel.org/r/1557665521-17570-1-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/Kconfig | 3 | ||||
| -rw-r--r-- | arch/x86/include/asm/arch_hweight.h | 2 | ||||
| -rw-r--r-- | lib/hweight.c | 4 |
3 files changed, 0 insertions, 9 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 0a3cc347143f..de071d7e67b6 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -261,9 +261,6 @@ config GENERIC_BUG config GENERIC_BUG_RELATIVE_POINTERS bool -config GENERIC_HWEIGHT - def_bool y - config ARCH_MAY_HAVE_PC_FDC def_bool y depends on ISA_DMA_API diff --git a/arch/x86/include/asm/arch_hweight.h b/arch/x86/include/asm/arch_hweight.h index fc0693569f7a..ba88edd0d58b 100644 --- a/arch/x86/include/asm/arch_hweight.h +++ b/arch/x86/include/asm/arch_hweight.h @@ -12,8 +12,6 @@ #define REG_OUT "a" #endif -#define __HAVE_ARCH_SW_HWEIGHT - static __always_inline unsigned int __arch_hweight32(unsigned int w) { unsigned int res; diff --git a/lib/hweight.c b/lib/hweight.c index 7660d88fd496..c94586b62551 100644 --- a/lib/hweight.c +++ b/lib/hweight.c @@ -10,7 +10,6 @@ * The Hamming Weight of a number is the total number of bits set in it. */ -#ifndef __HAVE_ARCH_SW_HWEIGHT unsigned int __sw_hweight32(unsigned int w) { #ifdef CONFIG_ARCH_HAS_FAST_MULTIPLIER @@ -27,7 +26,6 @@ unsigned int __sw_hweight32(unsigned int w) #endif } EXPORT_SYMBOL(__sw_hweight32); -#endif unsigned int __sw_hweight16(unsigned int w) { @@ -46,7 +44,6 @@ unsigned int __sw_hweight8(unsigned int w) } EXPORT_SYMBOL(__sw_hweight8); -#ifndef __HAVE_ARCH_SW_HWEIGHT unsigned long __sw_hweight64(__u64 w) { #if BITS_PER_LONG == 32 @@ -69,4 +66,3 @@ unsigned long __sw_hweight64(__u64 w) #endif } EXPORT_SYMBOL(__sw_hweight64); -#endif |