kiocb_invalidate_post_direct_write
kiocb_invalidate_post_direct_write(iocb, count);
kiocb_invalidate_post_direct_write(dio->iocb, ret);
kiocb_invalidate_post_direct_write(iocb, dio->size);
void kiocb_invalidate_post_direct_write(struct kiocb *iocb, size_t count);
kiocb_invalidate_post_direct_write(iocb, written);