Re: [PATCH v16 08/10] x86/arch_prctl: Add ARCH_[GET|SET]_CPUID

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On Mon, 20 Mar 2017, Kyle Huey wrote:
> --- a/arch/x86/include/uapi/asm/prctl.h
> +++ b/arch/x86/include/uapi/asm/prctl.h
> @@ -6,8 +6,17 @@
>  #define ARCH_GET_FS 0x1003
>  #define ARCH_GET_GS 0x1004
>  
> +#define ARCH_GET_CPUID 0x1005
> +#define ARCH_SET_CPUID 0x1006
> +
>  #define ARCH_MAP_VDSO_X32	0x2001
>  #define ARCH_MAP_VDSO_32	0x2002
>  #define ARCH_MAP_VDSO_64	0x2003
>  
> +#ifdef CONFIG_CHECKPOINT_RESTORE
> +# define ARCH_MAP_VDSO_X32	0x2001
> +# define ARCH_MAP_VDSO_32	0x2002
> +# define ARCH_MAP_VDSO_64	0x2003
> +#endif

That hunk is bogus in two aspects:
     - It's just a copy of the above wrapped in a ifdef
     
     - The ifdef is broken, because the UAPI headers do not know about
       that.

I dropped it.



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