[PATCH RFC 1/5] dma/direct: turn ARCH_ZONE_DMA_BITS into a variable

[Christoph Hellwig]

On Thu, Oct 31, 2019 at 11:30:36AM +0100, Nicolas Saenz Julienne wrote:
> On Wed, 2019-10-30 at 14:49 -0700, Christoph Hellwig wrote:
> > On Mon, Oct 14, 2019 at 08:31:03PM +0200, Nicolas Saenz Julienne wrote:
> > > Some architectures, notably ARM, are interested in tweaking this
> > > depending on their runtime DMA addressing limitations.
> > > 
> > > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne at suse.de>
> > 
> > Do you want me to pick this up for the 5.5 dma-mapping tree, or do you
> > want me to wait for the rest to settle?
> 
> I'd say take it, this will be ultimately needed once we push forward with ARM.

Can you resend a version that applies against 5.4-rc?  The current one
has conflicts in the arm64 code.