extern void Afs_Lock_Obtain(struct Lock *lock, int how);
extern void Afs_Lock_ReleaseR(struct Lock *lock);
extern void Afs_Lock_ReleaseW(struct Lock *lock);
+extern void Afs_Lock_WakeupR(struct Lock *lock);
void Lock_Init(struct Lock *lock);
void Lock_Destroy(struct Lock *lock);