mutex_lock_io_nested  151 include/linux/mutex.h extern void mutex_lock_io_nested(struct mutex *lock, unsigned int subclass);
mutex_lock_io_nested  156 include/linux/mutex.h #define mutex_lock_io(lock) mutex_lock_io_nested(lock, 0)
mutex_lock_io_nested 1156 kernel/locking/mutex.c EXPORT_SYMBOL_GPL(mutex_lock_io_nested);