__ntfs_bswap_constant_64
# define bswap_64(x) __ntfs_bswap_constant_64(x)
#define __constant_be64_to_cpu(x) __ntfs_bswap_constant_64((u64)(x))
#define __constant_cpu_to_be64(x) __ntfs_bswap_constant_64((u64)(x))
#define __constant_le64_to_cpu(x) __ntfs_bswap_constant_64((u64)(x))
#define __constant_cpu_to_le64(x) __ntfs_bswap_constant_64((u64)(x))