1#ifndef _ADFS_FS_H
 2#define _ADFS_FS_H
 3
 4#include <uapi/linux/adfs_fs.h>
 5
 6/*
 7 * Calculate the boot block checksum on an ADFS drive.  Note that this will
 8 * appear to be correct if the sector contains all zeros, so also check that
 9 * the disk size is non-zero!!!
10 */
11static inline int adfs_checkbblk(unsigned char *ptr)
12{
13	unsigned int result = 0;
14	unsigned char *p = ptr + 511;
15
16	do {
17	        result = (result & 0xff) + (result >> 8);
18        	result = result + *--p;
19	} while (p != ptr);
20
21	return (result & 0xff) != ptr[511];
22}
23#endif