Re: [PATCH v6 02/34] iov_iter: Use IOCB/IOMAP_WRITE/op_is_write rather than iterator direction

[Christoph Hellwig]

On Mon, Jan 16, 2023 at 11:08:17PM +0000, David Howells wrote:
> Use information other than the iterator direction to determine the
> direction of the I/O:
> 
>  (*) If a kiocb is available, use the IOCB_WRITE flag.
> 
>  (*) If an iomap_iter is available, use the IOMAP_WRITE flag.
> 
>  (*) If a request is available, use op_is_write().

The really should be three independent patches.  Plus another one
to drop the debug checks in cifs.

The changes themselves look good to me.

>  
> +static unsigned char iov_iter_rw(const struct iov_iter *i)
> +{
> +	return i->data_source ? WRITE : READ;
> +}

It might as well make sense to just open code this in the only
caller as well (yet another patch).