EXT4_NSEC_MASK    424 fs/ext4/ext4.h 			   ((time->tv_nsec << 2) & EXT4_NSEC_MASK));
EXT4_NSEC_MASK    432 fs/ext4/ext4.h        time->tv_nsec = (le32_to_cpu(extra) & EXT4_NSEC_MASK) >> 2;