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SubjectRe: [PATCH] [5/7] Readd rdmsrl_safe
On Wed, 12 Mar 2008, Andi Kleen wrote:
> RDMSR for 64bit values with exception handling.
>
> Makes it easier to deal with 64bit valued MSRs. The old 64bit code
> base had that too as checking_rdmsrl(), but it got dropped somehow.

Yup, no users.

> +#define rdmsrl_safe(msr,p) \
> + ({ int __err; *(p) = native_read_msr_safe(msr, &__err); __err; })
> +

static inline please

> #define rdtscl(low) \
> ((low) = (u32)native_read_tsc())
>
> Index: linux/include/asm-x86/paravirt.h
> ===================================================================
> --- linux.orig/include/asm-x86/paravirt.h
> +++ linux/include/asm-x86/paravirt.h
> @@ -687,6 +687,10 @@ static inline int paravirt_write_msr(uns
> (*b) = _l >> 32; \
> _err; })
>
> +#define rdmsrl_safe(msr, p) ({ \
> + int _err; \
> + *(p) = paravirt_read_msr(msr, &_err); \
> + _err; })

ditto

Thanks,

tglx


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