Re: [PATCH v2] dma-contiguous: define proper name for global cma region

[Christoph Hellwig]

On Tue, Aug 01, 2023 at 10:39:04PM -0700, John Stultz wrote:
> So, forgive me, I've not had a chance to look into this, but my
> recollection was "reserved" is the name we see on x86, but other names
> are possibly provided via the dts node?

Indeed, dma_contiguous_default_area can also be set through
rmem_cma_setup, which then takes the name from DT.

> I believe on the hikey board its "linux,cma" is the name, so forcing
> it to reserved would break that.
> 
> Maybe instead add a compat config option to force the cma name (so x86
> can set it to "default" if needed)?


I think we'll just need to leave it as-is.  I with dma-heaps had never
exposed the name to userspace, but we'll have to lіve with it now.