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    SubjectRe: [PATCH 2/3] x86, msr: rewrite AMD rd/wrmsr variants
    On 08/30/2009 04:50 AM, Borislav Petkov wrote:
    > +
    > +#define memset(d,c,l) __builtin_memset(d,c,l)
    > static inline int rdmsrl_amd_safe(unsigned msr, unsigned long long *p)
    > {
    > - int err;
    > + u32 gprs[8];
    > + int err, i;
    > +
    > + memset(gprs, 0, sizeof(u32) * 8);
    > +
    > + gprs[1] = msr;
    > + gprs[7] = 0x9c5a203a;
    > +
    > + err = native_rdmsr_safe_regs(gprs);
    > +
    > + *p = gprs[0] | ((u64)gprs[2] << 32);
    >
    > - *p = native_read_msr_amd_safe(msr, &err);
    > return err;
    > }
    >

    In file included from
    /home/hpa/kernel/linux-2.6-tip.msr/arch/x86/include/asm/processor.h:21,
    from
    /home/hpa/kernel/linux-2.6-tip.msr/include/linux/prefetch.h:14,
    from
    /home/hpa/kernel/linux-2.6-tip.msr/include/linux/list.h:6,
    from
    /home/hpa/kernel/linux-2.6-tip.msr/include/linux/smp.h:11,
    from
    /home/hpa/kernel/linux-2.6-tip.msr/include/linux/kernel_stat.h:4,
    from
    /home/hpa/kernel/linux-2.6-tip.msr/arch/x86/kernel/irq_64.c:11:
    /home/hpa/kernel/linux-2.6-tip.msr/arch/x86/include/asm/msr.h: In
    function ‘rdmsrl_amd_safe’:
    /home/hpa/kernel/linux-2.6-tip.msr/arch/x86/include/asm/msr.h:176:
    warning: unused variable ‘i’


    --
    H. Peter Anvin, Intel Open Source Technology Center
    I work for Intel. I don't speak on their behalf.

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