--- /dev/null
+#ifndef _LINEAR_H
+#define _LINEAR_H
+
+struct dev_info {
+ mdk_rdev_t *rdev;
+ sector_t num_sectors;
+ sector_t start_sector;
+};
+
+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 spacing;
+ sector_t array_sectors;
+ int sector_shift; /* shift before dividing
+ * by 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