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    SubjectRe: [PATCH 1/2] perf tools: allow building for ARM

    * Jamie Iles <jamie.iles@picochip.com> wrote:

    > +#ifdef __arm__
    > +#include "../../arch/arm/include/asm/unistd.h"
    > +#define rmb() asm volatile("":::"memory")
    > +#define cpu_relax() asm volatile("":::"memory")
    > +#endif

    cpu_relax() looks fine, but rmb() seems not to match the one that can be
    found in arch/arm/:

    arch/arm/include/asm/system.h:#define rmb() dmb()
    arch/arm/include/asm/system.h:#define rmb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0)
    arch/arm/include/asm/system.h:#define smp_rmb() rmb()

    arch/arm/include/asm/system.h:#define dmb() __asm__ __volatile__ ("dmb" : : : "memory")
    arch/arm/include/asm/system.h:#define dmb() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" \
    arch/arm/include/asm/system.h:#define dmb() __asm__ __volatile__ ("" : : : "memory")
    arch/arm/include/asm/system.h:#define dmb() __asm__ __volatile__ ("" : : : "memory")

    Ingo


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