tree 7dd254aae286708e4463e6e07db46c53440d29fe
parent 4656dfb6b5ddb2c7e6120b8a8d0b144445bf5914
author Andi Kleen <ak@linux.intel.com> 1533679777 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1534349694 +0200

x86/speculation/l1tf: Make pmd/pud_mknotpresent() invert

commit 0768f91530ff46683e0b372df14fd79fe8d156e5 upstream

Some cases in THP like:
  - MADV_FREE
  - mprotect
  - split

mark the PMD non present for temporarily to prevent races. The window for
an L1TF attack in these contexts is very small, but it wants to be fixed
for correctness sake.

Use the proper low level functions for pmd/pud_mknotpresent() to address
this.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>