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cpuidle: Move polling state initialization code to separate file

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Move the polling state initialization code to a separate file built
conditionally on CONFIG_ARCH_HAS_CPU_RELAX to get rid of the #ifdef
in driver.c.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Rafael J. Wysocki
2017-08-23 23:21:07 +02:00
parent dc2251bf98
commit 34c2f65b71
4 changed files with 43 additions and 31 deletions
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36
drivers/cpuidle/poll_state.c Normal file
View File

@@ -0,0 +1,36 @@
/*
* poll_state.c - Polling idle state
*
* This file is released under the GPLv2.
*/
#include <linux/cpuidle.h>
#include <linux/sched.h>
#include <linux/sched/idle.h>
static int __cpuidle poll_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
local_irq_enable();
if (!current_set_polling_and_test()) {
while (!need_resched())
cpu_relax();
}
current_clr_polling();
return index;
}
void poll_idle_init(struct cpuidle_driver *drv)
{
struct cpuidle_state *state = &drv->states[0];
snprintf(state->name, CPUIDLE_NAME_LEN, "POLL");
snprintf(state->desc, CPUIDLE_DESC_LEN, "CPUIDLE CORE POLL IDLE");
state->exit_latency = 0;
state->target_residency = 0;
state->power_usage = -1;
state->enter = poll_idle;
state->disabled = false;
state->flags = CPUIDLE_FLAG_POLLING;
}