written_blk      3593 fs/ext4/inode.c 		ext4_lblk_t written_blk, end_blk;
written_blk      3595 fs/ext4/inode.c 		written_blk = (offset + written) >> blkbits;
written_blk      3597 fs/ext4/inode.c 		if (written_blk < end_blk && ext4_can_truncate(inode))