Re: [PATCH] mm: Export symbols unmapped_area() & unmapped_area_topdown()

From	Rik van Riel <riel@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] mm: Export symbols unmapped_area() & unmapped_area_topdown()
Date	2016-03-16 22:10 +0100
Message-ID	<rdqRA-66V-1@gated-at.bofh.it> (permalink)
References	<rdnh0-3tX-13@gated-at.bofh.it> <rdnh0-3tX-11@gated-at.bofh.it> <rdqox-5zZ-9@gated-at.bofh.it>
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On Wed, 2016-03-16 at 13:36 -0700, Christoph Hellwig wrote:
> On Wed, Mar 16, 2016 at 05:10:34PM +0000, Olu Ogunbowale wrote:
> > 
> > From: Olujide Ogunbowale <Olu.Ogunbowale@imgtec.com>
> > 
> > Export the memory management functions, unmapped_area() &
> > unmapped_area_topdown(), as GPL symbols; this allows the kernel to
> > better support process address space mirroring on both CPU and
> > device
> > for out-of-tree drivers by allowing the use of vm_unmapped_area()
> > in a
> > driver's file operation get_unmapped_area().
> No new exports without in-tree drivers.  How about you get started
> to get your drives into the tree first?

The drivers appear to require the HMM framework though,
which people are also reluctant to merge without the
drivers.

How do we get past this chicken & egg situation?

-- 
All Rights Reversed.

Thread

[PATCH] mm: Export symbols unmapped_area() & unmapped_area_topdown() Olu Ogunbowale <Olu.Ogunbowale@imgtec.com> - 2016-03-16 18:20 +0100
  Re: [PATCH] mm: Export symbols unmapped_area() &  unmapped_area_topdown() Christoph Hellwig <hch@infradead.org> - 2016-03-16 21:40 +0100
    Re: [PATCH] mm: Export symbols unmapped_area() &  unmapped_area_topdown() Rik van Riel <riel@redhat.com> - 2016-03-16 22:10 +0100
      Re: [PATCH] mm: Export symbols unmapped_area() &  unmapped_area_topdown() Ingo Molnar <mingo@kernel.org> - 2016-03-17 08:30 +0100
  Re: [PATCH] mm: Export symbols unmapped_area() &  unmapped_area_topdown() Jerome Glisse <j.glisse@gmail.com> - 2016-03-17 15:40 +0100
    Re: [PATCH] mm: Export symbols unmapped_area() & unmapped_area_topdown() Oded Gabbay <oded.gabbay@gmail.com> - 2016-03-17 16:40 +0100
    Re: [PATCH] mm: Export symbols unmapped_area() &  unmapped_area_topdown() Olu Ogunbowale <olu.ogunbowale@imgtec.com> - 2016-03-17 16:50 +0100

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