Messages in this thread Patch in this message | | | Date | Tue, 22 Apr 2008 16:27:29 +0100 | From | "Jan Beulich" <> | Subject | [PATCH] x86: separate cmpxchg8b checking from PAE checking |
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.. allowing the former to be use in non-PAE kernels, too.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
--- arch/x86/Kconfig.cpu | 4 ++++ include/asm-x86/required-features.h | 6 +++++- 2 files changed, 9 insertions(+), 1 deletion(-)
--- linux-2.6.25/arch/x86/Kconfig.cpu 2008-04-17 04:49:44.000000000 +0200 +++ 2.6.25-x86-cmpxchg64/arch/x86/Kconfig.cpu 2008-04-15 10:49:20.000000000 +0200 @@ -394,6 +394,10 @@ config X86_TSC def_bool y depends on ((MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64 +config X86_CMPXCHG64 + def_bool y + depends on X86_PAE || X86_64 + # this should be set for all -march=.. options where the compiler # generates cmov. config X86_CMOV --- linux-2.6.25/include/asm-x86/required-features.h 2008-01-24 23:58:37.000000000 +0100 +++ 2.6.25-x86-cmpxchg64/include/asm-x86/required-features.h 2008-04-15 10:49:20.000000000 +0200 @@ -19,9 +19,13 @@ #if defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) # define NEED_PAE (1<<(X86_FEATURE_PAE & 31)) -# define NEED_CX8 (1<<(X86_FEATURE_CX8 & 31)) #else # define NEED_PAE 0 +#endif + +#ifdef CONFIG_X86_CMPXCHG64 +# define NEED_CX8 (1<<(X86_FEATURE_CX8 & 31)) +#else # define NEED_CX8 0 #endif
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