rwsem_acquire_read 459 include/linux/lockdep.h # define rwsem_acquire_read(l, s, t, i) lock_acquire(l, s, t, 1, 2, NULL, i) rwsem_acquire_read 462 include/linux/lockdep.h # define rwsem_acquire_read(l, s, t, i) lock_acquire(l, s, t, 1, 1, NULL, i) rwsem_acquire_read 467 include/linux/lockdep.h # define rwsem_acquire_read(l, s, t, i) do { } while (0)