Re: [PATCH 2/4] mm: add a io_mapping_map_user helper

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On Wed, Oct 20, 2021 at 09:37:51PM +0200, Peter Zijlstra wrote:
> > I'm not sure what exactly brought me to check this, but while debugging
> > I noticed this outside the header guard. But then after some more checks I
> > saw nothing actually selects CONFIG_IO_MAPPING because commit using
> > it was reverted in commit 0e4fe0c9f2f9 ("Revert "i915: use io_mapping_map_user"")
> > 
> > Is this something we want to re-attempt moving to mm/ ?
> 
> Yes, it would be very good to unexport apply_to_page_range(), it's a
> terrible interface to expose.

Yes.  We need to get back to this rather sooner than later.  I'm a little
swamped unfortunately.



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