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 */ adfs_checkbblk(unsigned char * ptr)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 24