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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 

Pull s390 fix from Martin Schwidefsky:
 "There is one more fix I would like to see in 4.11: The combination of
  KVM, CMMA and heavy paging can cause data corruption, the fix is to
  clear the _PAGE_UNUSED bit in set_pte_at()"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/mm: fix CMMA vs KSM vs others
This commit is contained in:
Linus Torvalds 2017-04-20 12:20:30 -07:00
parent f205b5dc1c a8f60d1fad
commit db5dc49964
1 changed files with 2 additions and 0 deletions
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2
arch/s390/include/asm/pgtable.h
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@ -1051,6 +1051,8 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
{
if (!MACHINE_HAS_NX)
pte_val(entry) &= ~_PAGE_NOEXEC;
if (pte_present(entry))
pte_val(entry) &= ~_PAGE_UNUSED;
if (mm_has_pgste(mm))
ptep_set_pte_at(mm, addr, ptep, entry);
else