Re: [RFC PATCH 08/11] iov_iter: Drop iov_iter_rw() and fold in last user

[Christoph Hellwig]

On Fri, Jun 30, 2023 at 04:25:21PM +0100, David Howells wrote:
> Drop the last usage of iov_iter_rw() into __iov_iter_get_pages_alloc().

Well, if we can't just drop this check entirely, the rest of the prep
work is just churn and not actually very useful.  Shouldn't we go
all the way and kill ITER_DEST/SOURCE?