Re: [PATCH] iov_iter: optimise bvec iov_iter_advance()

[Christoph Hellwig]

On Thu, Dec 03, 2020 at 11:48:56AM +0000, Pavel Begunkov wrote:
> It's inlined and the on-stack iter is completely optimised out. Frankly,
> I'd rather not open-code bvec_iter_advance(), at least for this chunk to
> be findable from bvec.h, e.g. grep bvec_iter and bvec_for_each. Though,
> I don't like myself that preamble/postamble.

Ok.  I still think we at least want a separate helper instead of
bloating the main iov_iter_advance.