37 lines
824 B
C
37 lines
824 B
C
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/*
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* poll_state.c - Polling idle state
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*
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* This file is released under the GPLv2.
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*/
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#include <linux/cpuidle.h>
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#include <linux/sched.h>
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#include <linux/sched/idle.h>
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static int __cpuidle poll_idle(struct cpuidle_device *dev,
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struct cpuidle_driver *drv, int index)
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{
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local_irq_enable();
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if (!current_set_polling_and_test()) {
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while (!need_resched())
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cpu_relax();
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}
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current_clr_polling();
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return index;
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}
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void poll_idle_init(struct cpuidle_driver *drv)
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{
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struct cpuidle_state *state = &drv->states[0];
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snprintf(state->name, CPUIDLE_NAME_LEN, "POLL");
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snprintf(state->desc, CPUIDLE_DESC_LEN, "CPUIDLE CORE POLL IDLE");
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state->exit_latency = 0;
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state->target_residency = 0;
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state->power_usage = -1;
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state->enter = poll_idle;
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state->disabled = false;
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state->flags = CPUIDLE_FLAG_POLLING;
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}
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