tests/headers.cocci

   1 @ rule1 @
   2 identifier f;
   3 @@
   4
   5 usb_fill_bulk_urb(f)
   6
   7 @ rule2 extends rule1 @
   8 identifier p1, p2;
   9 @@
  10
  11 - void f(struct urb *p1, struct pt_regs *p2)
  12 + void f(struct urb *p1)
  13   {
  14     ... when != p2
  15   }