1 printk
   2 find_first_zero_bit
   3 dvb_usb_generic_rw
   4 __dynamic_pr_debug
   5 strncmp
   6 strncpy 2 1
   7 strlcpy 2 1
   8 strncat 2 1
   9 snprintf
  10 copy_from_user 2 1
  11 copy_to_user 2 0
  12 read_rom 2 3
  13 skb_pull 1 -1