logfs: remove the second argument of k[un]map_atomic()

Signed-off-by: Cong Wang <amwang@redhat.com>
diff --git a/fs/logfs/segment.c b/fs/logfs/segment.c
index ab798ed..e28d090 100644
--- a/fs/logfs/segment.c
+++ b/fs/logfs/segment.c
@@ -543,9 +543,9 @@
 		BUG_ON(!item); /* mempool empty */
 		memset(item, 0, sizeof(*item));
 
-		child = kmap_atomic(page, KM_USER0);
+		child = kmap_atomic(page);
 		item->val = child[pos];
-		kunmap_atomic(child, KM_USER0);
+		kunmap_atomic(child);
 		item->child_no = pos;
 		list_add(&item->list, &block->item_list);
 	}