** Tags removed: verification-needed-zesty
** Tags added: verification-done-zesty

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https://bugs.launchpad.net/bugs/1700819

Title:
  ERAT invalidate on context switch removal

Status in Ubuntu:
  New
Status in linux package in Ubuntu:
  Fix Committed
Status in The Zesty Zapus:
  New
Status in linux source package in Zesty:
  Fix Committed

Bug description:
  On P9 (Nimbus) DD2 and later, in radix mode, the move to the PID
  register will implicitly invalidate the user space ERAT entries
  and leave the kernel ones alone. Thus the only thing needed is
  an isync() to synchronize this with subsequent uaccess's 

  Upstream submission:

  http://patchwork.ozlabs.org/patch/780515/

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