RE: [PATCH v3 2/2] iov_iter: Don't deal with iter->copy_mc in memcpy_from_iter_mc()

[David Laight]

From: David Howells
> Sent: Wednesday, August 16, 2023 2:01 PM
> 
> David Laight <David.Laight@xxxxxxxxxx> wrote:
> 
> >
> > Couldn't the relevant code directly call __copy_from_iter_mc() ?
> > Or a version then checked iov_is_copy_mc() and then fell
> > back to the standard function.
> 
> No, because the marked iterator is handed by the coredump code to
> __kernel_write_iter() and thence on to who-knows-what driver - which will call
> copy_from_iter() or some such.  $DRIVER shouldn't need to know about
> ->copy_mc.

What about ITER_BVEC_MC ??

	David

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