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    Subject[PATCH] PM / EM: Micro optimization in em_pd_energy
    Date
    When the sum of the utilization of CPUs in a power domain is zero,
    return the energy as 0 without doing any computations.

    Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
    ---
    include/linux/energy_model.h | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/include/linux/energy_model.h b/include/linux/energy_model.h
    index b67a51c..8810f1f 100644
    --- a/include/linux/energy_model.h
    +++ b/include/linux/energy_model.h
    @@ -103,6 +103,9 @@ static inline unsigned long em_cpu_energy(struct em_perf_domain *pd,
    struct em_perf_state *ps;
    int i, cpu;

    + if (!sum_util)
    + return 0;
    +
    /*
    * In order to predict the performance state, map the utilization of
    * the most utilized CPU of the performance domain to a requested
    --
    Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.
    Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
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