ÿØÿà JFIF 

  
 
  ÿÛ C      

!"$"$ÿÛ C
  ÿÂ p 
" 

ÿÄ  

 

          
 ÿÄ 


 

           
ÿÚ 
   
ÕÔË®
(%	aA*‚XYD¡(J„¡E¢RE,P€XYae )(E¤²€B¤R¥	BQ¤¢ X«)X…€¤   
@  

  ..............................................................................................................................................................................
.............................................................................                                                  
                                                                                                                                                                                     ÿØÿà JFIF 

  
 
  ÿÛ C      

!"$"$ÿÛ C
  ÿÂ p 
" 

ÿÄ  

 

          
 ÿÄ 


 

           
ÿÚ 
   
ÕÔË®
(%	aA*‚XYD¡(J„¡E¢RE,P€XYae )(E¤²€B¤R¥	BQ¤¢ X«)X…€¤   
@  

  ..............................................................................................................................................................................
.............................................................................                                                  
                                                                                                                                                                                     /* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ADFS_FS_H
#define _ADFS_FS_H

#include <uapi/linux/adfs_fs.h>

/*
 * Calculate the boot block checksum on an ADFS drive.  Note that this will
 * appear to be correct if the sector contains all zeros, so also check that
 * the disk size is non-zero!!!
 */
static inline int adfs_checkbblk(unsigned char *ptr)
{
	unsigned int result = 0;
	unsigned char *p = ptr + 511;

	do {
	        result = (result & 0xff) + (result >> 8);
        	result = result + *--p;
	} while (p != ptr);

	return (result & 0xff) != ptr[511];
}
#endif