Re: [PATCH v11 06/21] vfs: Add copy_to_iter(), copy_from_iter() and iov_iter_zero()

[Matthew Wilcox]

On Thu, Oct 16, 2014 at 02:12:06PM +0000, Mathieu Desnoyers wrote:
> > The access_ok() check is done higher up the call-chain if it's appropriate.
> > These functions can be (intentionally) called to access kernel addresses,
> > so it wouldn't be appropriate to do that here.
> 
> If the access_ok() are expected to be already done higher in the call-chain,
> we might want to rename e.g. copy_to_iter_iovec to
> __copy_to_iter_iovec(). It helps clarifying the check expectations for the
> caller.

I'm following the existing convention in this file; it already had
copy_page_to_iter() and copy_page_from_iter() as exported symbols.  I
just added copy_to_iter() and copy_from_iter().

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