X-Git-Url: http://git.cascardo.info/?a=blobdiff_plain;f=mm%2Fmremap.c;h=f54a43fa4b79886cac7d0066dbc1968e98dfadea;hb=df1eab303c836c98a79de427aa1c7d6812acaaa9;hp=a7c93eceb1c8d1ce59235d47ec7e49df4efefb86;hpb=d024bae2c45956bf76f375ee532305dbfb3a6ba4;p=cascardo%2Flinux.git

diff --git a/mm/mremap.c b/mm/mremap.c
index a7c93eceb1c8..f54a43fa4b79 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -276,6 +276,12 @@ static unsigned long move_vma(struct vm_area_struct *vma,
 	moved_len = move_page_tables(vma, old_addr, new_vma, new_addr, old_len,
 				     need_rmap_locks);
 	if (moved_len < old_len) {
+		err = -ENOMEM;
+	} else if (vma->vm_file && vma->vm_file->f_op->mremap) {
+		err = vma->vm_file->f_op->mremap(vma->vm_file, new_vma);
+	}
+
+	if (unlikely(err)) {
 		/*
 		 * On error, move entries back from new area to old,
 		 * which will succeed since page tables still there,
@@ -286,16 +292,8 @@ static unsigned long move_vma(struct vm_area_struct *vma,
 		vma = new_vma;
 		old_len = new_len;
 		old_addr = new_addr;
-		new_addr = -ENOMEM;
+		new_addr = err;
 	} else {
-		if (vma->vm_file && vma->vm_file->f_op->mremap) {
-			err = vma->vm_file->f_op->mremap(vma->vm_file, new_vma);
-			if (err < 0) {
-				move_page_tables(new_vma, new_addr, vma,
-						 old_addr, moved_len, true);
-				return err;
-			}
-		}
 		arch_remap(mm, old_addr, old_addr + old_len,
 			   new_addr, new_addr + new_len);
 	}