rwsem_test_oflags
!rwsem_test_oflags(sem, RWSEM_NONSPINNABLE), sem);
return rwsem_test_oflags(sem, RWSEM_READER_OWNED);
if (rwsem_test_oflags(sem, RWSEM_NONSPINNABLE))
if (unlikely(rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)))