Re: [PATCH v5 2/7] mm, devm_memremap_pages: Kill mapping "System RAM" support

[Christoph Hellwig]

On Wed, Sep 12, 2018 at 07:22:11PM -0700, Dan Williams wrote:
> Given the fact that devm_memremap_pages() requires a percpu_ref that is
> torn down by devm_memremap_pages_release() the current support for
> mapping RAM is broken.

I agree.  Do you remember why we even added it in the first place?

Signed-off-by: Christoph Hellwig <hch@xxxxxx>