#ifndef _LINUX_LOCKDEP_H #define _LINUX_LOCKDEP_H #include <linux/spinlock.h> struct lock_class_key { unsigned int a; }; static inline void lockdep_set_class(spinlock_t *lock, struct lock_class_key *key) { } extern int lockdep_is_held(const void *); #endif /* _LINUX_LOCKDEP_H */