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

[Christoph Hellwig]

On Thu, Oct 31, 2019 at 06:06:19PM +0000, Catalin Marinas wrote:
> On Thu, Oct 31, 2019 at 05:58:53PM +0100, Christoph Hellwig wrote:
> > On Thu, Oct 31, 2019 at 05:22:59PM +0100, Nicolas Saenz Julienne wrote:
> > > OK, I see what you mean now. It's wrong indeed.
> > > 
> > > The trouble is the ZONE_DMA series[1] in arm64, also due for v5.5, will be
> > > affected by this patch. I don't know the right way to approach this problem
> > > since depending on the merge order, this patch should be updated or the arm64
> > > ZONE_DMA series fixed.
> > > 
> > > Maybe it's easier to just wait for v5.6.
> > 
> > Ok, I can wait.  Or the arm64 maintainers can pick up this patch if
> > you want to add it to that series.
> 
> This branch is stable (may add a fix but not I'm not rebasing it) if you
> want to base this patch on top:
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-next/zone-dma
> 
> Otherwise, with your ack, I can add it on top of the above branch (aimed
> at 5.5).

Please go ahead:

Acked-by: Christoph Hellwig <hch at lst.de>