On Thu, Nov 19, 2020 at 07:00:19PM +0100, Michal Kubecek wrote: > While eventfd ->read() callback was replaced by ->read_iter() recently by > commit 12aceb89b0bc ("eventfd: convert to f_op->read_iter()"), ->write() > was not replaced. > > Convert also ->write() to ->write_iter() to make the interface more > consistent and allow non-blocking writes from e.g. io_uring. Also > reorganize the code and return value handling in a similar way as it was > done in eventfd_read(). But this patch does not allow non-blocking writes. I'm really suspicious as you're obviously trying to hide something from us.