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

Signed-off-by: Cong Wang <amwang@redhat.com>
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 86ce9a5..94dff88 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1906,9 +1906,9 @@
 			 * we can expect USER0 is not used (see vread/vwrite's
 			 * function description)
 			 */
-			void *map = kmap_atomic(p, KM_USER0);
+			void *map = kmap_atomic(p);
 			memcpy(buf, map + offset, length);
-			kunmap_atomic(map, KM_USER0);
+			kunmap_atomic(map);
 		} else
 			memset(buf, 0, length);
 
@@ -1945,9 +1945,9 @@
 			 * we can expect USER0 is not used (see vread/vwrite's
 			 * function description)
 			 */
-			void *map = kmap_atomic(p, KM_USER0);
+			void *map = kmap_atomic(p);
 			memcpy(map + offset, buf, length);
-			kunmap_atomic(map, KM_USER0);
+			kunmap_atomic(map);
 		}
 		addr += length;
 		buf += length;