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Date: Sun, 31 Jan 2016 11:51:23 -0800
Message-ID: <CAPcyv4hiipJ2Mm6KRD9u3cA8aCT95ioBRpCNxvujEAeG26PvvQ@mail.gmail.com>
Subject: Re: [PATCH 2/2] dax: fix bdev NULL pointer dereferences
From: Dan Williams <dan.j.williams@intel.com>
To: Matthew Wilcox <willy@linux.intel.com>
Cc: Ross Zwisler <zwisler@gmail.com>, linux-nvdimm <linux-nvdimm@ml01.01.org>,
        Dave Chinner <david@fromorbit.com>,
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        Christoph Hellwig <hch@infradead.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.com>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
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On Sun, Jan 31, 2016 at 10:07 AM, Matthew Wilcox <willy@linux.intel.com> wrote:
> One option that I've been looking at (primarily for x86-32) is
> having an rbtree of PFN ranges that drivers add to when they register
> peristent memory.

On this specific point we do already have find_dev_pagemap().