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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-08-24 00:21:07 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-08-30 04:06:27 +0300
commit34c2f65b718d44ea7d7b3cc10777f410677455ce (patch)
tree70a9a541937ff04eb67c1bda48f81da664231df6 /drivers/cpuidle/poll_state.c
parentdc2251bf98c66db3f4e055b751968f0871037ae4 (diff)
downloadlinux-34c2f65b718d44ea7d7b3cc10777f410677455ce.tar.xz
cpuidle: Move polling state initialization code to separate file
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>
Diffstat (limited to 'drivers/cpuidle/poll_state.c')
-rw-r--r--drivers/cpuidle/poll_state.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/cpuidle/poll_state.c b/drivers/cpuidle/poll_state.c
new file mode 100644
index 000000000000..0db4f7273952
--- /dev/null
+++ b/drivers/cpuidle/poll_state.c
@@ -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;
+}