[PATCH 10/12] new iov_iter flavour: pipe-backed

[Miklos Szeredi]

On Fri, Sep 30, 2016 at 12:50 AM, Al Viro <viro at zeniv.linux.org.uk> wrote:
> On Thu, Sep 29, 2016 at 10:53:55PM +0200, Miklos Szeredi wrote:
>
>> The EFAULT logic seems to be missing across the board.  And callers
>> don't expect a zero return value.  Most will loop indefinitely.
>
> Nope.  copy_page_to_iter() *never* returns -EFAULT.  Including the iovec
> one - check copy_page_to_iter_iovec().  Any caller that does not expect
> a zero return value from that primitive is a bug, triggerable as soon as
> you feed it an iovec with NULL ->iov_base.

Right.

I was actually looking at iov_iter_get_pages() callers...

Thanks,
Miklos