linux-kernel - Re: [PATCH 2/2] dax: fix bdev NULL pointer dereferences

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Date:	Sun, 31 Jan 2016 11:51:23 -0800
From:	Dan Williams <dan.j.williams@...el.com>
To:	Matthew Wilcox <willy@...ux.intel.com>
Cc:	Ross Zwisler <zwisler@...il.com>,
	linux-nvdimm <linux-nvdimm@...1.01.org>,
	Dave Chinner <david@...morbit.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Jan Kara <jack@...e.com>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 2/2] dax: fix bdev NULL pointer dereferences

On Sun, Jan 31, 2016 at 10:07 AM, Matthew Wilcox <willy@...ux.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().