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

From	Ingo Molnar <mingo@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH] mm: Export symbols unmapped_area() & unmapped_area_topdown()
Date	2016-03-17 08:30 +0100
Message-ID	<rdAxA-4fU-9@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> <rdqRA-66V-1@gated-at.bofh.it>
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* Rik van Riel <riel@redhat.com> wrote:

> 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?

Submit the export together with the drivers for review and Cc: VM folks - it all 
looks pretty small on the VM side.

Thanks,

	Ingo

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() Olu Ogunbowale <olu.ogunbowale@imgtec.com> - 2016-03-17 17:50 +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
      Re: [PATCH] mm: Export symbols unmapped_area() &  unmapped_area_topdown() Jerome Glisse <j.glisse@gmail.com> - 2016-03-17 18:10 +0100
        Re: [PATCH] mm: Export symbols unmapped_area() &  unmapped_area_topdown() Olu Ogunbowale <olu.ogunbowale@imgtec.com> - 2016-03-17 18:50 +0100

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