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authorRafael J. Wysocki <rjw@sisk.pl>2012-06-16 17:20:11 +0400
committerRafael J. Wysocki <rjw@sisk.pl>2012-07-03 21:06:25 +0400
commit6e797a078824b30afbfae6cc4b1c2b21c51761ef (patch)
tree7f58824b2c1e62b954683900024a5b97a4d30b4d /include/linux/cpuidle.h
parentdc7fd275ae60ef8edf952aff2a62462f5d892fd4 (diff)
downloadlinux-6e797a078824b30afbfae6cc4b1c2b21c51761ef.tar.xz
PM / cpuidle: Add driver reference counter
Add a reference counter for the cpuidle driver, so that it can't be unregistered when it is in use. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'include/linux/cpuidle.h')
-rw-r--r--include/linux/cpuidle.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 8570012a535a..27cfced7b57b 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -136,7 +136,9 @@ struct cpuidle_driver {
extern void disable_cpuidle(void);
extern int cpuidle_idle_call(void);
extern int cpuidle_register_driver(struct cpuidle_driver *drv);
-struct cpuidle_driver *cpuidle_get_driver(void);
+extern struct cpuidle_driver *cpuidle_get_driver(void);
+extern struct cpuidle_driver *cpuidle_driver_ref(void);
+extern void cpuidle_driver_unref(void);
extern void cpuidle_unregister_driver(struct cpuidle_driver *drv);
extern int cpuidle_register_device(struct cpuidle_device *dev);
extern void cpuidle_unregister_device(struct cpuidle_device *dev);
@@ -157,6 +159,8 @@ static inline int cpuidle_idle_call(void) { return -ENODEV; }
static inline int cpuidle_register_driver(struct cpuidle_driver *drv)
{return -ENODEV; }
static inline struct cpuidle_driver *cpuidle_get_driver(void) {return NULL; }
+static inline struct cpuidle_driver *cpuidle_driver_ref(void) {return NULL; }
+static inline void cpuidle_driver_unref(void) {}
static inline void cpuidle_unregister_driver(struct cpuidle_driver *drv) { }
static inline int cpuidle_register_device(struct cpuidle_device *dev)
{return -ENODEV; }