These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / include / linux / osq_lock.h

diff --git a/kernel/include/linux/osq_lock.h b/kernel/include/linux/osq_lock.h
index 3a6490e..703ea5c 100644 (file)
--- a/kernel/include/linux/osq_lock.h
+++ b/kernel/include/linux/osq_lock.h
@@ -32,4 +32,9 @@ static inline void osq_lock_init(struct optimistic_spin_queue *lock)
 extern bool osq_lock(struct optimistic_spin_queue *lock);
 extern void osq_unlock(struct optimistic_spin_queue *lock);
 
+static inline bool osq_is_locked(struct optimistic_spin_queue *lock)
+{
+       return atomic_read(&lock->tail) != OSQ_UNLOCKED_VAL;
+}
+
 #endif