[S390] fix page table walk for changing page attributes

The page table walk for changing page attributes used the wrong
address for pgd/pud/pmd lookups if the range was bigger than
a pmd entry. Fix the lookup by using the correct address.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
index 122ffbd08ce016e4c87d744adcdf9b9cbf2c3c7f..0607e4b14b2742798e36b957c7f17e1451bc0bf0 100644 (file)
--- a/arch/s390/mm/pageattr.c
+++ b/arch/s390/mm/pageattr.c
@@ -24,12 +24,13 @@ static void change_page_attr(unsigned long addr, int numpages,
                        WARN_ON_ONCE(1);
                        continue;
                }
-               ptep = pte_offset_kernel(pmdp, addr + i * PAGE_SIZE);
+               ptep = pte_offset_kernel(pmdp, addr);
 
                pte = *ptep;
                pte = set(pte);
-               ptep_invalidate(&init_mm, addr + i * PAGE_SIZE, ptep);
+               ptep_invalidate(&init_mm, addr, ptep);
                *ptep = pte;
+               addr += PAGE_SIZE;
        }
 }