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[Tim Gardner <tim.gardner@xxxxxxxxxxxxx>]

Oops, too hasty. It appears there is a compile error. I'm likely missing
a scaffolding patch.

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https://bugs.launchpad.net/bugs/1357014

Title:
  Add THP fixes in 14.10 kernel

Status in “linux” package in Ubuntu:
  Fix Committed
Status in “linux” source package in Trusty:
  In Progress
Status in “linux” source package in Utopic:
  Fix Committed

Bug description:
  Hi Canonical,

  We would like to include 8 patches regarding Transparent Huge Page for
  powerpc. The patches are already upstream on Ben powerpc-next tree and
  should be sent to Linus' tree today, which mean that they are expected
  to make 3.17.

  Here are the patches

  9e813308a5c18c58f9ccae1ec72ed4e14eaf9025 powerpc/thp: Add tracepoints to track hugepage invalidate
  85c1fafd7262e68ad821ee1808686b1392b1167d powerpc/mm: Use read barrier when creating real_pte
  7e467245bf5226db34c4b12d3cbacfa2f7a15a8b powerpc/thp: Use ACCESS_ONCE when loading pmdp
  969b7b208f7408712a3526856e4ae60ad13f6928 powerpc/thp: Invalidate with vpn in loop
  fc0479557572375100ef16c71170b29a98e0d69a powerpc/thp: Handle combo pages in invalidate
  629149fae478f0ac6bf705a535708b192e9c6b59 powerpc/thp: Invalidate old 64K based hash page mapping before insert of 4k pte
  fa1f8ae80f8bb996594167ff4750a0b0a5a5bb5d powerpc/thp: Don't recompute vsid and ssize in loop on invalidate
  b0aa44a3dfae3d8f45bd1264349aa87f87b7774f powerpc/thp: Add write barrier after updating the valid bit

  I am also adding the patches here for reference.

  Thank you,
  Breno

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