diff options
Diffstat (limited to 'include/linux/rtmutex.h')
| -rw-r--r-- | include/linux/rtmutex.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h index 852740285d71..174419ee58e9 100644 --- a/include/linux/rtmutex.h +++ b/include/linux/rtmutex.h @@ -13,6 +13,7 @@ #ifndef __LINUX_RT_MUTEX_H #define __LINUX_RT_MUTEX_H +#include <linux/compiler.h> #include <linux/linkage.h> #include <linux/rbtree.h> #include <linux/spinlock_types.h> @@ -32,6 +33,17 @@ struct rt_mutex_base { .owner = NULL \ } +/** + * rt_mutex_base_is_locked - is the rtmutex locked + * @lock: the mutex to be queried + * + * Returns true if the mutex is locked, false if unlocked. + */ +static inline bool rt_mutex_base_is_locked(struct rt_mutex_base *lock) +{ + return READ_ONCE(lock->owner) != NULL; +} + extern void rt_mutex_base_init(struct rt_mutex_base *rtb); /** |