lib/tables_csum.c

   1 /*
   2  * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <linux/ctype.h>
   9
  10 u8 table_compute_checksum(void *v, int len)
  11 {
  12         u8 *bytes = v;
  13         u8 checksum = 0;
  14         int i;
  15
  16         for (i = 0; i < len; i++)
  17                 checksum -= bytes[i];
  18
  19         return checksum;
  20 }