[RFC PATCH 1/4] mm: use proper PTE accessors in madvise() and mremap()

[Alexander Gordeev <agordeev@linux.ibm.com>]

Follow the pattern established by commit c33c794828f2 ("mm:
ptep_get() conversion") and use proper accessors instead of
direct pointer dereferences.

Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
---
 mm/madvise.c | 2 +-
 mm/mremap.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/madvise.c b/mm/madvise.c
index 77552b03d318..7d369b1ff8e5 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -1106,7 +1106,7 @@ static int guard_install_set_pte(unsigned long addr, unsigned long next,
 	unsigned long *nr_pages = (unsigned long *)walk->private;
 
 	/* Simply install a PTE marker, this causes segfault on access. */
-	*ptep = make_pte_marker(PTE_MARKER_GUARD);
+	set_pte(ptep, make_pte_marker(PTE_MARKER_GUARD));
 	(*nr_pages)++;
 
 	return 0;
diff --git a/mm/mremap.c b/mm/mremap.c
index e9c8b1d05832..fc3b90274a57 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -264,7 +264,7 @@ static int move_ptes(struct pagetable_move_control *pmc,
 
 	for (; old_addr < old_end; old_ptep += nr_ptes, old_addr += nr_ptes * PAGE_SIZE,
 		new_ptep += nr_ptes, new_addr += nr_ptes * PAGE_SIZE) {
-		VM_WARN_ON_ONCE(!pte_none(*new_ptep));
+		VM_WARN_ON_ONCE(!pte_none(ptep_get(new_ptep)));
 
 		nr_ptes = 1;
 		max_nr_ptes = (old_end - old_addr) >> PAGE_SHIFT;
-- 
2.53.0