From: Janosch Frank frankja@linux.ibm.com
commit 528a9539348a0234375dfaa1ca5dbbb2f8f8e8d2 upstream.
If the pmd is soft dirty we must mark the pte as soft dirty (and not dirty). This fixes some cases for guest migration with huge page backings.
Cc: stable@vger.kernel.org # 4.8 Fixes: bc29b7ac1d9f ("s390/mm: clean up pte/pmd encoding") Reviewed-by: Christian Borntraeger borntraeger@de.ibm.com Reviewed-by: Gerald Schaefer gerald.schaefer@de.ibm.com Signed-off-by: Janosch Frank frankja@linux.ibm.com Signed-off-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/s390/mm/hugetlbpage.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/s390/mm/hugetlbpage.c +++ b/arch/s390/mm/hugetlbpage.c @@ -111,7 +111,7 @@ static inline pte_t __rste_to_pte(unsign _PAGE_YOUNG); #ifdef CONFIG_MEM_SOFT_DIRTY pte_val(pte) |= move_set_bit(rste, _SEGMENT_ENTRY_SOFT_DIRTY, - _PAGE_DIRTY); + _PAGE_SOFT_DIRTY); #endif } else pte_val(pte) = _PAGE_INVALID;