lib/tables_csum.c

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