lock_map_acquire  473 include/linux/lockdep.h #  define lock_map_acquire(l)		lock_acquire(l, 0, 0, 0, 2, NULL, _THIS_IP_)
lock_map_acquire  475 include/linux/lockdep.h #  define lock_map_acquire(l)		lock_acquire(l, 0, 0, 0, 1, NULL, _THIS_IP_)
lock_map_acquire  479 include/linux/lockdep.h # define lock_map_acquire(l)			do { } while (0)