diff options
| author | Daniel Lezcano <daniel.lezcano@linaro.org> | 2012-10-31 16:44:45 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2012-11-15 00:34:22 +0100 |
| commit | 42f67f2acab2b7179c0d1ab234869e391448dfa6 (patch) | |
| tree | 2ae9b604adea21b4047228763b77307c50f2574b | |
| parent | 8f3e9953e1e4ae5c11e2e880e7d85c03c0180613 (diff) | |
cpuidle: move driver's refcount to cpuidle
We want to support different cpuidle drivers co-existing together.
In this case we should move the refcount to the cpuidle_driver
structure to handle several drivers at a time.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpuidle/driver.c | 13 | ||||
| -rw-r--r-- | include/linux/cpuidle.h | 1 |
2 files changed, 9 insertions, 5 deletions
diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c index 87db3877fea..39ba8e181e9 100644 --- a/drivers/cpuidle/driver.c +++ b/drivers/cpuidle/driver.c @@ -16,7 +16,6 @@ static struct cpuidle_driver *cpuidle_curr_driver; DEFINE_SPINLOCK(cpuidle_driver_lock); -int cpuidle_driver_refcount; static void set_power_states(struct cpuidle_driver *drv) { @@ -61,6 +60,8 @@ int cpuidle_register_driver(struct cpuidle_driver *drv) if (!drv->power_specified) set_power_states(drv); + drv->refcnt = 0; + cpuidle_curr_driver = drv; spin_unlock(&cpuidle_driver_lock); @@ -92,7 +93,7 @@ void cpuidle_unregister_driver(struct cpuidle_driver *drv) spin_lock(&cpuidle_driver_lock); - if (!WARN_ON(cpuidle_driver_refcount > 0)) + if (!WARN_ON(drv->refcnt > 0)) cpuidle_curr_driver = NULL; spin_unlock(&cpuidle_driver_lock); @@ -106,7 +107,7 @@ struct cpuidle_driver *cpuidle_driver_ref(void) spin_lock(&cpuidle_driver_lock); drv = cpuidle_curr_driver; - cpuidle_driver_refcount++; + drv->refcnt++; spin_unlock(&cpuidle_driver_lock); return drv; @@ -114,10 +115,12 @@ struct cpuidle_driver *cpuidle_driver_ref(void) void cpuidle_driver_unref(void) { + struct cpuidle_driver *drv = cpuidle_curr_driver; + spin_lock(&cpuidle_driver_lock); - if (!WARN_ON(cpuidle_driver_refcount <= 0)) - cpuidle_driver_refcount--; + if (drv && !WARN_ON(drv->refcnt <= 0)) + drv->refcnt--; spin_unlock(&cpuidle_driver_lock); } diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 7daf0e3b93b..d08e1afa491 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -124,6 +124,7 @@ static inline int cpuidle_get_last_residency(struct cpuidle_device *dev) struct cpuidle_driver { const char *name; struct module *owner; + int refcnt; unsigned int power_specified:1; /* set to 1 to use the core cpuidle time keeping (for all states). */ |