c
   static int xdp_do_generic_redirect_map(struct net_device *dev,
                                          struct bpf_prog *xdp_prog) {
       if (xdp_prog == NULL) {
           // Handle the error appropriately
           // - Log an error message
           // - Return an error code
           // - Potentially use a default program if applicable
       }
       // ... rest of the function 
   }
   