On 08/19/2012 05:56 AM, Andi Kleen wrote: > From: Andi Kleen <a...@linux.intel.com> > > The fancy x86 hweight uses different compiler options for the > hweight file. This does not work with LTO. Just disable the optimization > with LTO > > Signed-off-by: Andi Kleen <a...@linux.intel.com> > --- > arch/x86/Kconfig | 5 +++-- > arch/x86/include/asm/arch_hweight.h | 9 +++++++++ > 2 files changed, 12 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index 8ec3a1a..9382b09 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -224,8 +224,9 @@ config X86_32_LAZY_GS > > config ARCH_HWEIGHT_CFLAGS > string > - default "-fcall-saved-ecx -fcall-saved-edx" if X86_32 > - default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx > -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 > -fcall-saved-r11" if X86_64 > + default "-fcall-saved-ecx -fcall-saved-edx" if X86_32 && !LTO > + default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx > -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 > -fcall-saved-r11" if X86_64 && !LTO > + default "" if LTO >
Seems heavy handed. How about using __attribute__((optimize(...))) instead? -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
