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    Subject[PATCH 05/26] x86/oprofile: Use per_cpu() instead of __get_cpu_var()
    Date
    __get_cpu_var() calls smp_processor_id(). When the cpu id is already
    known, instead use per_cpu() to avoid generating the id again.

    Signed-off-by: Robert Richter <robert.richter@amd.com>
    ---
    arch/x86/oprofile/nmi_int.c | 4 ++--
    1 files changed, 2 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
    index e54f6a0..8cd4658 100644
    --- a/arch/x86/oprofile/nmi_int.c
    +++ b/arch/x86/oprofile/nmi_int.c
    @@ -294,7 +294,7 @@ static void nmi_cpu_shutdown(void *dummy)
    {
    unsigned int v;
    int cpu = smp_processor_id();
    - struct op_msrs *msrs = &__get_cpu_var(cpu_msrs);
    + struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu);

    /* restoring APIC_LVTPC can trigger an apic error because the delivery
    * mode and vector nr combination can be illegal. That's by design: on
    @@ -307,7 +307,7 @@ static void nmi_cpu_shutdown(void *dummy)
    apic_write(APIC_LVTERR, v);
    nmi_cpu_restore_registers(msrs);
    #ifdef CONFIG_OPROFILE_EVENT_MULTIPLEX
    - __get_cpu_var(switch_index) = 0;
    + per_cpu(switch_index, cpu) = 0;
    #endif
    }

    --
    1.6.3.3



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