summaryrefslogtreecommitdiff
path: root/drivers/cpuidle/driver.c
diff options
context:
space:
mode:
authorDaniel Lezcano <daniel.lezcano@linaro.org>2012-09-22 00:38:32 +0200
committerRafael J. Wysocki <rjw@sisk.pl>2012-09-22 00:38:32 +0200
commited953472d181e1d149f17d85d82de9634db296c3 (patch)
treef236987a37c2ce04175d3e7c97b88e69ea955ff8 /drivers/cpuidle/driver.c
parenta77de28662adea391d8ed952e2b9c49b60193e8c (diff)
cpuidle: rename function name "__cpuidle_register_driver", v2
The function __cpuidle_register_driver name is confusing because it suggests, conforming to the coding style of the kernel, it registers the driver without taking a lock. Actually, it just fill the different power field states with a decresing value if the power has not been specified. Clarify the purpose of the function by changing its name and move the condition out of this function. This patch fix nothing and does not change the behavior of the function. It is just for the sake of clarity. IHMO, reading in the code: + if (!drv->power_specified) + set_power_states(drv); is much more explicit than: - __cpuidle_register_driver(drv); Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'drivers/cpuidle/driver.c')
-rw-r--r--drivers/cpuidle/driver.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c
index 424bc8105387..87db3877fead 100644
--- a/drivers/cpuidle/driver.c
+++ b/drivers/cpuidle/driver.c
@@ -18,9 +18,10 @@ static struct cpuidle_driver *cpuidle_curr_driver;
DEFINE_SPINLOCK(cpuidle_driver_lock);
int cpuidle_driver_refcount;
-static void __cpuidle_register_driver(struct cpuidle_driver *drv)
+static void set_power_states(struct cpuidle_driver *drv)
{
int i;
+
/*
* cpuidle driver should set the drv->power_specified bit
* before registering if the driver provides
@@ -35,10 +36,8 @@ static void __cpuidle_register_driver(struct cpuidle_driver *drv)
* an power value of -1. So we use -2, -3, etc, for other
* c-states.
*/
- if (!drv->power_specified) {
- for (i = CPUIDLE_DRIVER_STATE_START; i < drv->state_count; i++)
- drv->states[i].power_usage = -1 - i;
- }
+ for (i = CPUIDLE_DRIVER_STATE_START; i < drv->state_count; i++)
+ drv->states[i].power_usage = -1 - i;
}
/**
@@ -58,8 +57,12 @@ int cpuidle_register_driver(struct cpuidle_driver *drv)
spin_unlock(&cpuidle_driver_lock);
return -EBUSY;
}
- __cpuidle_register_driver(drv);
+
+ if (!drv->power_specified)
+ set_power_states(drv);
+
cpuidle_curr_driver = drv;
+
spin_unlock(&cpuidle_driver_lock);
return 0;