From: "Aneesh Kumar K.V" <redacted>
Subject: mm/mremap: don't enable optimized PUD move if page table levels is 2

With two level page table don't enable move_normal_pud.

Link: https://lkml.kernel.org/r/20210616045239.370802-5-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <redacted>
Cc: Christophe Leroy <redacted>
Cc: Hugh Dickins <hughd@google.com>
Cc: Joel Fernandes <redacted>
Cc: Kalesh Singh <redacted>
Cc: Kirill A. Shutemov <redacted>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Stephen Rothwell <redacted>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mremap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/mremap.c~mm-mremap-dont-enable-optimized-pud-move-if-page-table-levels-is-2
+++ a/mm/mremap.c

@@ -276,7 +276,7 @@ static inline bool move_normal_pmd(struc
 }
 #endif
 
-#ifdef CONFIG_HAVE_MOVE_PUD
+#if CONFIG_PGTABLE_LEVELS > 2 && defined(CONFIG_HAVE_MOVE_PUD)
 static bool move_normal_pud(struct vm_area_struct *vma, unsigned long old_addr,
 		  unsigned long new_addr, pud_t *old_pud, pud_t *new_pud)
 {

_