[PATCH] mm/nvdimm: Add is_ioremap_addr and use that to check ioremap address

[Andrew Morton]

On Mon,  1 Jul 2019 19:10:38 +0530 "Aneesh Kumar K.V" <aneesh.kumar at linux.ibm.com> wrote:

> Architectures like powerpc use different address range to map ioremap
> and vmalloc range. The memunmap() check used by the nvdimm layer was
> wrongly using is_vmalloc_addr() to check for ioremap range which fails for
> ppc64. This result in ppc64 not freeing the ioremap mapping. The side effect
> of this is an unbind failure during module unload with papr_scm nvdimm driver

The patch applies to 5.1.  Does it need a Fixes: and a Cc:stable?