tree faeb0c28acb29ff347f9416ae207e739117cb9a0
parent 34c0fd540e79fb49ef9ce864dae1058cca265780
author Dan Williams <dan.j.williams@intel.com> 1452905777 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1452909392 -0800

mm: skip memory block registration for ZONE_DEVICE

Prevent userspace from trying and failing to online ZONE_DEVICE pages
which are meant to never be onlined.

For example on platforms with a udev rule like the following:

  SUBSYSTEM=="memory", ACTION=="add", ATTR{state}=="offline", ATTR{state}="online"

...will generate futile attempts to online the ZONE_DEVICE sections.
Example kernel messages:

    Built 1 zonelists in Node order, mobility grouping on.  Total pages: 1004747
    Policy zone: Normal
    online_pages [mem 0x248000000-0x24fffffff] failed

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>