From 291c68f10e8ec6dc46737f27617949fd2f04e6ef Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Mon, 3 Jun 2019 17:21:05 +0200 Subject: [PATCH] x86: further speed-up to hweight{32,64}() According to Linux commit 0136611c62 ("optimize hweight64 for x86_64") this is a further improvement over the variant using only bitwise operations. It's also a slight further code size reduction. Suggested-by: Andrew Cooper Signed-off-by: Jan Beulich Acked-by: Andrew Cooper --- xen/arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig index 4b8b07b549..f502d765ba 100644 --- a/xen/arch/x86/Kconfig +++ b/xen/arch/x86/Kconfig @@ -12,6 +12,7 @@ config X86 select HAS_CPUFREQ select HAS_EHCI select HAS_EX_TABLE + select HAS_FAST_MULTIPLY select HAS_GDBSX select HAS_IOPORTS select HAS_KEXEC -- 2.30.2