FAT_HASH_BITS     253 fs/fat/inode.c 	tmp = tmp + (tmp >> FAT_HASH_BITS) + (tmp >> FAT_HASH_BITS * 2);
FAT_HASH_BITS     211 include/linux/msdos_fs.h #define FAT_HASH_SIZE	(1UL << FAT_HASH_BITS)