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Date: Tue, 17 Jul 2018 14:37:50 -0700
From: Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH v2] mm: disallow mapping that conflict for
 devm_memremap_pages()
Message-Id: <20180717143750.3cd7e77544d181a346212715@linux-foundation.org>
In-Reply-To: <152909478401.50143.312364396244072931.stgit@djiang5-desk3.ch.intel.com>
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To: Dave Jiang <dave.jiang@intel.com>
Cc: linux-mm@kvack.org, dan.j.williams@intel.com, elliott@hpe.com, linux-nvdimm@lists.01.org

On Fri, 15 Jun 2018 13:33:39 -0700 Dave Jiang <dave.jiang@intel.com> wrote:

> When pmem namespaces created are smaller than section size, this can cause
> issue during removal and gpf was observed:
> 
> ...
>
> Add code to check whether we have mapping already in the same section and
> prevent additional mapping from created if that is the case.
> 

Which kernel version(s) do you believe need this fix, and why?