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    Subject[RFC 1/7] sched: idle: Add sched get idle state helper
    Date
    This helper is useful in order to get the idle state of a specific cpu.

    Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
    ---
    include/linux/cpuidle.h | 1 +
    kernel/sched/idle.c | 11 +++++++++++
    2 files changed, 12 insertions(+)

    diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
    index 3b39472..88a9119 100644
    --- a/include/linux/cpuidle.h
    +++ b/include/linux/cpuidle.h
    @@ -211,6 +211,7 @@ static inline void cpuidle_use_deepest_state(bool enable)

    /* kernel/sched/idle.c */
    extern void sched_idle_set_state(struct cpuidle_state *idle_state);
    +extern struct cpuidle_state *sched_idle_get_state(int cpu);
    extern void default_idle_call(void);

    #ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
    diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
    index f5516ba..484825d 100644
    --- a/kernel/sched/idle.c
    +++ b/kernel/sched/idle.c
    @@ -21,6 +21,17 @@ void sched_idle_set_state(struct cpuidle_state *idle_state)
    idle_set_state(this_rq(), idle_state);
    }

    +/**
    + * sched_idle_get_state - Get idle state for the specified CPU.
    + * @index: CPU index.
    + */
    +
    +struct cpuidle_state *sched_idle_get_state(int cpu)
    +{
    + return idle_get_state(cpu_rq(cpu));
    +}
    +
    +
    static int __read_mostly cpu_idle_force_poll;

    void cpu_idle_poll_ctrl(bool enable)
    --
    2.7.4
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