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SubjectRe: [PATCH 2/2] dax: fix bdev NULL pointer dereferences
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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().

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