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

arch/s390/include/asm/pgtable.h

@@ -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