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Date: Mon, 1 Jul 2019 16:51:52 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Subject: Re: [PATCH] mm/nvdimm: Add is_ioremap_addr and use that to check
 ioremap address
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On Mon,  1 Jul 2019 19:10:38 +0530 "Aneesh Kumar K.V" <aneesh.kumar@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?