X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=mm%2Fmremap.c;h=05f1180e9f21822e99a5f11a2a7a03af663a422c;hb=4fff5ca78029f4df452334ecf013e53bf29079cc;hp=0843feb66f3d0236abd4386b5bfd0170c24ae0ef;hpb=d96d8aa261708ecb1536d2733081800e7e15e8f4;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

diff --git a/mm/mremap.c b/mm/mremap.c
index 0843feb..05f1180 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -194,10 +194,17 @@ unsigned long move_page_tables(struct vm_area_struct *vma,
 			break;
 		if (pmd_trans_huge(*old_pmd)) {
 			int err = 0;
-			if (extent == HPAGE_PMD_SIZE)
+			if (extent == HPAGE_PMD_SIZE) {
+				VM_BUG_ON(vma->vm_file || !vma->anon_vma);
+				/* See comment in move_ptes() */
+				if (need_rmap_locks)
+					anon_vma_lock_write(vma->anon_vma);
 				err = move_huge_pmd(vma, new_vma, old_addr,
 						    new_addr, old_end,
 						    old_pmd, new_pmd);
+				if (need_rmap_locks)
+					anon_vma_unlock_write(vma->anon_vma);
+			}
 			if (err > 0) {
 				need_flush = true;
 				continue;