root/include/linux/raid/linear.h

#ifndef _LINEAR_H
#define _LINEAR_H

#include <linux/raid/md.h>

struct dev_info {
        mdk_rdev_t      *rdev;
        sector_t        size;
        sector_t        offset;
};

typedef struct dev_info dev_info_t;

struct linear_private_data
{
        struct linear_private_data *prev;       /* earlier version */
        dev_info_t              **hash_table;
        sector_t                hash_spacing;
        sector_t                array_sectors;
        int                     preshift; /* shift before dividing by hash_spacing */
        dev_info_t              disks[0];
};


typedef struct linear_private_data linear_conf_t;

#define mddev_to_conf(mddev) ((linear_conf_t *) mddev->private)

#endif