On Fri, Sep 10, 2021 at 11:50 AM Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
>
> I think that sizeof(struct bio_vec) != sizeof(struct iovec):
Ooh, very good catch.
That would cause some *very* odd and subtle errors, since it just
happens to work on 64-bit, and then causes very confusing pointer
arithmetic errors on 32-bit.
So yeah, that
i->iov -= state->nr_segs - i->nr_segs;
doesn't work after all, comment or not.
So only 'struct iovec' and 'struct kvec' actually have the same format
and can be used interchangeably.
Linus
