FAN_ERRNO_BITS
#define FAN_ERRNO_SHIFT (32 - FAN_ERRNO_BITS)
#define FAN_ERRNO_MASK ((1 << FAN_ERRNO_BITS) - 1)
#define FAN_ERRNO_SHIFT (32 - FAN_ERRNO_BITS)
#define FAN_ERRNO_MASK ((1 << FAN_ERRNO_BITS) - 1)