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    SubjectRe: [PATCH 17/37] x86, pkeys: add functions to fetch PKRU
    On Mon, 16 Nov 2015, Dave Hansen wrote:
    > +#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
    > +static inline u32 __read_pkru(void)
    > +{
    > + unsigned int eax, edx;
    > + unsigned int ecx = 0;
    > + unsigned int pkru;
    > +
    > + asm volatile(".byte 0x0f,0x01,0xee\n\t"
    > + : "=a" (eax), "=d" (edx)
    > + : "c" (ecx));
    > + pkru = eax;
    > + return pkru;

    Wouldn't a simple 'return eax;' be sufficient?

    Thanks,

    tglx


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