rwlock_acquire_read  432 include/linux/lockdep.h #  define rwlock_acquire_read(l, s, t, i)	lock_acquire(l, s, t, 2, 2, NULL, i)
rwlock_acquire_read  435 include/linux/lockdep.h #  define rwlock_acquire_read(l, s, t, i)	lock_acquire(l, s, t, 2, 1, NULL, i)
rwlock_acquire_read  440 include/linux/lockdep.h # define rwlock_acquire_read(l, s, t, i)	do { } while (0)