From: Colin Cross <ccross@android.com>
To: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-pm@lists.linux-foundation.org
Cc: Len Brown <len.brown@intel.com>, Kevin Hilman <khilman@ti.com>,
Santosh Shilimkar <santosh.shilimkar@ti.com>,
Amit Kucheria <amit.kucheria@linaro.org>,
Arjan van de Ven <arjan@linux.intel.com>,
Trinabh Gupta <g.trinabh@gmail.com>,
Deepthi Dharwar <deepthi@linux.vnet.ibm.com>,
linux-omap@vger.kernel.org, linux-tegra@vger.kernel.org,
Colin Cross <ccross@android.com>
Subject: [PATCH 1/3] cpuidle: refactor out cpuidle_enter_state
Date: Tue, 20 Dec 2011 16:09:05 -0800 [thread overview]
Message-ID: <1324426147-16735-2-git-send-email-ccross@android.com> (raw)
In-Reply-To: <1324426147-16735-1-git-send-email-ccross@android.com>
Split the code to enter a state and update the stats into a helper
function, cpuidle_enter_state, and export it. This function will
be called by the coupled state code to handle entering the safe
state and the final coupled state.
Signed-off-by: Colin Cross <ccross@android.com>
---
drivers/cpuidle/cpuidle.c | 43 +++++++++++++++++++++++++++++--------------
drivers/cpuidle/cpuidle.h | 2 ++
2 files changed, 31 insertions(+), 14 deletions(-)
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 06ce268..1486b3c 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -54,6 +54,34 @@ static void cpuidle_kick_cpus(void) {}
static int __cpuidle_register_device(struct cpuidle_device *dev);
/**
+ * cpuidle_enter_state
+ *
+ * enter the state and update stats
+ */
+int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
+ int next_state)
+{
+ int entered_state;
+ struct cpuidle_state *target_state;
+
+ target_state = &drv->states[next_state];
+
+ entered_state = target_state->enter(dev, drv, next_state);
+
+ if (entered_state >= 0) {
+ /* Update cpuidle counters */
+ /* This can be moved to within driver enter routine
+ * but that results in multiple copies of same code.
+ */
+ dev->states_usage[entered_state].time +=
+ (unsigned long long)dev->last_residency;
+ dev->states_usage[entered_state].usage++;
+ }
+
+ return entered_state;
+}
+
+/**
* cpuidle_idle_call - the main idle loop
*
* NOTE: no locks or semaphores should be used here
@@ -63,7 +91,6 @@ int cpuidle_idle_call(void)
{
struct cpuidle_device *dev = __this_cpu_read(cpuidle_devices);
struct cpuidle_driver *drv = cpuidle_get_driver();
- struct cpuidle_state *target_state;
int next_state, entered_state;
if (off)
@@ -92,26 +119,14 @@ int cpuidle_idle_call(void)
return 0;
}
- target_state = &drv->states[next_state];
-
trace_power_start(POWER_CSTATE, next_state, dev->cpu);
trace_cpu_idle(next_state, dev->cpu);
- entered_state = target_state->enter(dev, drv, next_state);
+ entered_state = cpuidle_enter_state(dev, drv, next_state);
trace_power_end(dev->cpu);
trace_cpu_idle(PWR_EVENT_EXIT, dev->cpu);
- if (entered_state >= 0) {
- /* Update cpuidle counters */
- /* This can be moved to within driver enter routine
- * but that results in multiple copies of same code.
- */
- dev->states_usage[entered_state].time +=
- (unsigned long long)dev->last_residency;
- dev->states_usage[entered_state].usage++;
- }
-
/* give the governor an opportunity to reflect on the outcome */
if (cpuidle_curr_governor->reflect)
cpuidle_curr_governor->reflect(dev, entered_state);
diff --git a/drivers/cpuidle/cpuidle.h b/drivers/cpuidle/cpuidle.h
index 38c3fd8..dd2df8f 100644
--- a/drivers/cpuidle/cpuidle.h
+++ b/drivers/cpuidle/cpuidle.h
@@ -14,6 +14,8 @@ extern struct list_head cpuidle_detected_devices;
extern struct mutex cpuidle_lock;
extern spinlock_t cpuidle_driver_lock;
extern int cpuidle_disabled(void);
+int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
+ int next_state);
/* idle loop */
extern void cpuidle_install_idle_handler(void);
--
1.7.4.1
next prev parent reply other threads:[~2011-12-21 0:09 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-21 0:09 [PATCH 0/3] coupled cpuidle state support Colin Cross
2011-12-21 0:09 ` Colin Cross [this message]
2012-01-04 14:08 ` [linux-pm] [PATCH 1/3] cpuidle: refactor out cpuidle_enter_state Jean Pihet
2011-12-21 0:09 ` [PATCH 2/3] cpuidle: fix error handling in __cpuidle_register_device Colin Cross
2011-12-21 0:09 ` [PATCH 3/3] cpuidle: add support for states that affect multiple cpus Colin Cross
2011-12-21 9:02 ` [PATCH 0/3] coupled cpuidle state support Arjan van de Ven
2011-12-21 9:40 ` Colin Cross
2011-12-21 9:44 ` Arjan van de Ven
2011-12-21 9:55 ` Colin Cross
2011-12-21 12:12 ` Arjan van de Ven
2011-12-21 19:05 ` Colin Cross
2011-12-21 19:36 ` Arjan van de Ven
2011-12-21 19:42 ` [linux-pm] " Colin Cross
2011-12-22 8:35 ` Shilimkar, Santosh
2011-12-22 8:53 ` Arjan van de Ven
2011-12-22 9:30 ` Shilimkar, Santosh
2011-12-22 21:20 ` Colin Cross
2012-03-14 0:39 ` Colin Cross
2012-01-04 0:41 ` Kevin Hilman
2012-01-04 17:27 ` Shilimkar, Santosh
2012-01-20 8:46 ` Daniel Lezcano
2012-01-20 20:40 ` Colin Cross
2012-01-25 14:04 ` Daniel Lezcano
2012-01-31 14:13 ` Daniel Lezcano
2012-01-27 8:54 ` [linux-pm] " Vincent Guittot
2012-01-27 17:32 ` Colin Cross
2012-02-01 12:13 ` Vincent Guittot
2012-02-01 14:59 ` Lorenzo Pieralisi
2012-02-01 17:30 ` Colin Cross
2012-02-01 18:07 ` Lorenzo Pieralisi
2012-02-03 1:19 ` Colin Cross
[not found] ` <8762e8kqi6.fsf@ti.com>
2012-03-14 0:28 ` Colin Cross
2012-03-14 0:47 ` Colin Cross
2012-03-14 14:23 ` [linux-pm] " Kevin Hilman
2012-03-14 2:04 ` Arjan van de Ven
2012-03-14 2:21 ` Colin Cross
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