diff --git a/include/linux/genhd.h b/include/linux/genhd.h
new file mode 100644
index 0000000..47dedaf
--- /dev/null
+++ b/include/linux/genhd.h
@@ -0,0 +1,424 @@
+#ifndef _LINUX_GENHD_H
+#define _LINUX_GENHD_H
+
+/*
+ * 	genhd.h Copyright (C) 1992 Drew Eckhardt
+ *	Generic hard disk header file by  
+ * 		Drew Eckhardt
+ *
+ *		<drew@colorado.edu>
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/major.h>
+#include <linux/device.h>
+#include <linux/smp.h>
+#include <linux/string.h>
+#include <linux/fs.h>
+
+enum {
+/* These three have identical behaviour; use the second one if DOS FDISK gets
+   confused about extended/logical partitions starting past cylinder 1023. */
+	DOS_EXTENDED_PARTITION = 5,
+	LINUX_EXTENDED_PARTITION = 0x85,
+	WIN98_EXTENDED_PARTITION = 0x0f,
+
+	LINUX_SWAP_PARTITION = 0x82,
+	LINUX_RAID_PARTITION = 0xfd,	/* autodetect RAID partition */
+
+	SOLARIS_X86_PARTITION =	LINUX_SWAP_PARTITION,
+	NEW_SOLARIS_X86_PARTITION = 0xbf,
+
+	DM6_AUX1PARTITION = 0x51,	/* no DDO:  use xlated geom */
+	DM6_AUX3PARTITION = 0x53,	/* no DDO:  use xlated geom */
+	DM6_PARTITION =	0x54,		/* has DDO: use xlated geom & offset */
+	EZD_PARTITION =	0x55,		/* EZ-DRIVE */
+
+	FREEBSD_PARTITION = 0xa5,	/* FreeBSD Partition ID */
+	OPENBSD_PARTITION = 0xa6,	/* OpenBSD Partition ID */
+	NETBSD_PARTITION = 0xa9,	/* NetBSD Partition ID */
+	BSDI_PARTITION = 0xb7,		/* BSDI Partition ID */
+	MINIX_PARTITION = 0x81,		/* Minix Partition ID */
+	UNIXWARE_PARTITION = 0x63,	/* Same as GNU_HURD and SCO Unix */
+};
+
+#ifndef __KERNEL__
+
+struct partition {
+	unsigned char boot_ind;		/* 0x80 - active */
+	unsigned char head;		/* starting head */
+	unsigned char sector;		/* starting sector */
+	unsigned char cyl;		/* starting cylinder */
+	unsigned char sys_ind;		/* What partition type */
+	unsigned char end_head;		/* end head */
+	unsigned char end_sector;	/* end sector */
+	unsigned char end_cyl;		/* end cylinder */
+	unsigned int start_sect;	/* starting sector counting from 0 */
+	unsigned int nr_sects;		/* nr of sectors in partition */
+} __attribute__((packed));
+
+#endif
+
+#ifdef __KERNEL__
+struct partition {
+	unsigned char boot_ind;		/* 0x80 - active */
+	unsigned char head;		/* starting head */
+	unsigned char sector;		/* starting sector */
+	unsigned char cyl;		/* starting cylinder */
+	unsigned char sys_ind;		/* What partition type */
+	unsigned char end_head;		/* end head */
+	unsigned char end_sector;	/* end sector */
+	unsigned char end_cyl;		/* end cylinder */
+	__le32 start_sect;	/* starting sector counting from 0 */
+	__le32 nr_sects;		/* nr of sectors in partition */
+} __attribute__((packed));
+
+struct hd_struct {
+	sector_t start_sect;
+	sector_t nr_sects;
+	struct kobject kobj;
+	unsigned reads, read_sectors, writes, write_sectors;
+	int policy, partno;
+};
+
+#define GENHD_FL_REMOVABLE			1
+#define GENHD_FL_DRIVERFS			2
+#define GENHD_FL_CD				8
+#define GENHD_FL_UP				16
+#define GENHD_FL_SUPPRESS_PARTITION_INFO	32
+
+struct disk_stats {
+	unsigned read_sectors, write_sectors;
+	unsigned reads, writes;
+	unsigned read_merges, write_merges;
+	unsigned read_ticks, write_ticks;
+	unsigned io_ticks;
+	unsigned time_in_queue;
+};
+	
+struct gendisk {
+	int major;			/* major number of driver */
+	int first_minor;
+	int minors;                     /* maximum number of minors, =1 for
+                                         * disks that can't be partitioned. */
+	char disk_name[32];		/* name of major driver */
+	struct hd_struct **part;	/* [indexed by minor] */
+	struct block_device_operations *fops;
+	struct request_queue *queue;
+	void *private_data;
+	sector_t capacity;
+
+	int flags;
+	char devfs_name[64];		/* devfs crap */
+	int number;			/* more of the same */
+	struct device *driverfs_dev;
+	struct kobject kobj;
+
+	struct timer_rand_state *random;
+	int policy;
+
+	atomic_t sync_io;		/* RAID */
+	unsigned long stamp, stamp_idle;
+	int in_flight;
+#ifdef	CONFIG_SMP
+	struct disk_stats *dkstats;
+#else
+	struct disk_stats dkstats;
+#endif
+};
+
+/* Structure for sysfs attributes on block devices */
+struct disk_attribute {
+	struct attribute attr;
+	ssize_t (*show)(struct gendisk *, char *);
+};
+
+/* 
+ * Macros to operate on percpu disk statistics:
+ *
+ * The __ variants should only be called in critical sections. The full
+ * variants disable/enable preemption.
+ */
+#ifdef	CONFIG_SMP
+#define __disk_stat_add(gendiskp, field, addnd) 	\
+	(per_cpu_ptr(gendiskp->dkstats, smp_processor_id())->field += addnd)
+
+#define disk_stat_read(gendiskp, field)					\
+({									\
+	typeof(gendiskp->dkstats->field) res = 0;			\
+	int i;								\
+	for (i=0; i < NR_CPUS; i++) {					\
+		if (!cpu_possible(i))					\
+			continue;					\
+		res += per_cpu_ptr(gendiskp->dkstats, i)->field;	\
+	}								\
+	res;								\
+})
+
+static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)	{
+	int i;
+	for (i=0; i < NR_CPUS; i++) {
+		if (cpu_possible(i)) {
+			memset(per_cpu_ptr(gendiskp->dkstats, i), value,	
+					sizeof (struct disk_stats));
+		}
+	}
+}		
+				
+#else
+#define __disk_stat_add(gendiskp, field, addnd) \
+				(gendiskp->dkstats.field += addnd)
+#define disk_stat_read(gendiskp, field)	(gendiskp->dkstats.field)
+
+static inline void disk_stat_set_all(struct gendisk *gendiskp, int value)	{
+	memset(&gendiskp->dkstats, value, sizeof (struct disk_stats));
+}
+#endif
+
+#define disk_stat_add(gendiskp, field, addnd)			\
+	do {							\
+		preempt_disable();				\
+		__disk_stat_add(gendiskp, field, addnd);	\
+		preempt_enable();				\
+	} while (0)
+
+#define __disk_stat_dec(gendiskp, field) __disk_stat_add(gendiskp, field, -1)
+#define disk_stat_dec(gendiskp, field) disk_stat_add(gendiskp, field, -1)
+
+#define __disk_stat_inc(gendiskp, field) __disk_stat_add(gendiskp, field, 1)
+#define disk_stat_inc(gendiskp, field) disk_stat_add(gendiskp, field, 1)
+
+#define __disk_stat_sub(gendiskp, field, subnd) \
+		__disk_stat_add(gendiskp, field, -subnd)
+#define disk_stat_sub(gendiskp, field, subnd) \
+		disk_stat_add(gendiskp, field, -subnd)
+
+
+/* Inlines to alloc and free disk stats in struct gendisk */
+#ifdef  CONFIG_SMP
+static inline int init_disk_stats(struct gendisk *disk)
+{
+	disk->dkstats = alloc_percpu(struct disk_stats);
+	if (!disk->dkstats)
+		return 0;
+	return 1;
+}
+
+static inline void free_disk_stats(struct gendisk *disk)
+{
+	free_percpu(disk->dkstats);
+}
+#else	/* CONFIG_SMP */
+static inline int init_disk_stats(struct gendisk *disk)
+{
+	return 1;
+}
+
+static inline void free_disk_stats(struct gendisk *disk)
+{
+}
+#endif	/* CONFIG_SMP */
+
+/* drivers/block/ll_rw_blk.c */
+extern void disk_round_stats(struct gendisk *disk);
+
+/* drivers/block/genhd.c */
+extern int get_blkdev_list(char *);
+extern void add_disk(struct gendisk *disk);
+extern void del_gendisk(struct gendisk *gp);
+extern void unlink_gendisk(struct gendisk *gp);
+extern struct gendisk *get_gendisk(dev_t dev, int *part);
+
+extern void set_device_ro(struct block_device *bdev, int flag);
+extern void set_disk_ro(struct gendisk *disk, int flag);
+
+/* drivers/char/random.c */
+extern void add_disk_randomness(struct gendisk *disk);
+extern void rand_initialize_disk(struct gendisk *disk);
+
+static inline sector_t get_start_sect(struct block_device *bdev)
+{
+	return bdev->bd_contains == bdev ? 0 : bdev->bd_part->start_sect;
+}
+static inline sector_t get_capacity(struct gendisk *disk)
+{
+	return disk->capacity;
+}
+static inline void set_capacity(struct gendisk *disk, sector_t size)
+{
+	disk->capacity = size;
+}
+
+#endif  /*  __KERNEL__  */
+
+#ifdef CONFIG_SOLARIS_X86_PARTITION
+
+#define SOLARIS_X86_NUMSLICE	8
+#define SOLARIS_X86_VTOC_SANE	(0x600DDEEEUL)
+
+struct solaris_x86_slice {
+	__le16 s_tag;		/* ID tag of partition */
+	__le16 s_flag;		/* permission flags */
+	__le32 s_start;		/* start sector no of partition */
+	__le32 s_size;		/* # of blocks in partition */
+};
+
+struct solaris_x86_vtoc {
+	unsigned int v_bootinfo[3];	/* info needed by mboot (unsupported) */
+	__le32 v_sanity;		/* to verify vtoc sanity */
+	__le32 v_version;		/* layout version */
+	char	v_volume[8];		/* volume name */
+	__le16	v_sectorsz;		/* sector size in bytes */
+	__le16	v_nparts;		/* number of partitions */
+	unsigned int v_reserved[10];	/* free space */
+	struct solaris_x86_slice
+		v_slice[SOLARIS_X86_NUMSLICE]; /* slice headers */
+	unsigned int timestamp[SOLARIS_X86_NUMSLICE]; /* timestamp (unsupported) */
+	char	v_asciilabel[128];	/* for compatibility */
+};
+
+#endif /* CONFIG_SOLARIS_X86_PARTITION */
+
+#ifdef CONFIG_BSD_DISKLABEL
+/*
+ * BSD disklabel support by Yossi Gottlieb <yogo@math.tau.ac.il>
+ * updated by Marc Espie <Marc.Espie@openbsd.org>
+ */
+
+/* check against BSD src/sys/sys/disklabel.h for consistency */
+
+#define BSD_DISKMAGIC	(0x82564557UL)	/* The disk magic number */
+#define BSD_MAXPARTITIONS	16
+#define OPENBSD_MAXPARTITIONS	16
+#define BSD_FS_UNUSED		0	/* disklabel unused partition entry ID */
+struct bsd_disklabel {
+	__le32	d_magic;		/* the magic number */
+	__s16	d_type;			/* drive type */
+	__s16	d_subtype;		/* controller/d_type specific */
+	char	d_typename[16];		/* type name, e.g. "eagle" */
+	char	d_packname[16];			/* pack identifier */ 
+	__u32	d_secsize;		/* # of bytes per sector */
+	__u32	d_nsectors;		/* # of data sectors per track */
+	__u32	d_ntracks;		/* # of tracks per cylinder */
+	__u32	d_ncylinders;		/* # of data cylinders per unit */
+	__u32	d_secpercyl;		/* # of data sectors per cylinder */
+	__u32	d_secperunit;		/* # of data sectors per unit */
+	__u16	d_sparespertrack;	/* # of spare sectors per track */
+	__u16	d_sparespercyl;		/* # of spare sectors per cylinder */
+	__u32	d_acylinders;		/* # of alt. cylinders per unit */
+	__u16	d_rpm;			/* rotational speed */
+	__u16	d_interleave;		/* hardware sector interleave */
+	__u16	d_trackskew;		/* sector 0 skew, per track */
+	__u16	d_cylskew;		/* sector 0 skew, per cylinder */
+	__u32	d_headswitch;		/* head switch time, usec */
+	__u32	d_trkseek;		/* track-to-track seek, usec */
+	__u32	d_flags;		/* generic flags */
+#define NDDATA 5
+	__u32	d_drivedata[NDDATA];	/* drive-type specific information */
+#define NSPARE 5
+	__u32	d_spare[NSPARE];	/* reserved for future use */
+	__le32	d_magic2;		/* the magic number (again) */
+	__le16	d_checksum;		/* xor of data incl. partitions */
+
+			/* filesystem and partition information: */
+	__le16	d_npartitions;		/* number of partitions in following */
+	__le32	d_bbsize;		/* size of boot area at sn0, bytes */
+	__le32	d_sbsize;		/* max size of fs superblock, bytes */
+	struct	bsd_partition {		/* the partition table */
+		__le32	p_size;		/* number of sectors in partition */
+		__le32	p_offset;	/* starting sector */
+		__le32	p_fsize;	/* filesystem basic fragment size */
+		__u8	p_fstype;	/* filesystem type, see below */
+		__u8	p_frag;		/* filesystem fragments per block */
+		__le16	p_cpg;		/* filesystem cylinders per group */
+	} d_partitions[BSD_MAXPARTITIONS];	/* actually may be more */
+};
+
+#endif	/* CONFIG_BSD_DISKLABEL */
+
+#ifdef CONFIG_UNIXWARE_DISKLABEL
+/*
+ * Unixware slices support by Andrzej Krzysztofowicz <ankry@mif.pg.gda.pl>
+ * and Krzysztof G. Baranowski <kgb@knm.org.pl>
+ */
+
+#define UNIXWARE_DISKMAGIC     (0xCA5E600DUL)	/* The disk magic number */
+#define UNIXWARE_DISKMAGIC2    (0x600DDEEEUL)	/* The slice table magic nr */
+#define UNIXWARE_NUMSLICE      16
+#define UNIXWARE_FS_UNUSED     0		/* Unused slice entry ID */
+
+struct unixware_slice {
+	__le16   s_label;	/* label */
+	__le16   s_flags;	/* permission flags */
+	__le32   start_sect;	/* starting sector */
+	__le32   nr_sects;	/* number of sectors in slice */
+};
+
+struct unixware_disklabel {
+	__le32   d_type;               	/* drive type */
+	__le32   d_magic;                /* the magic number */
+	__le32   d_version;              /* version number */
+	char    d_serial[12];           /* serial number of the device */
+	__le32   d_ncylinders;           /* # of data cylinders per device */
+	__le32   d_ntracks;              /* # of tracks per cylinder */
+	__le32   d_nsectors;             /* # of data sectors per track */
+	__le32   d_secsize;              /* # of bytes per sector */
+	__le32   d_part_start;           /* # of first sector of this partition */
+	__le32   d_unknown1[12];         /* ? */
+ 	__le32	d_alt_tbl;              /* byte offset of alternate table */
+ 	__le32	d_alt_len;              /* byte length of alternate table */
+ 	__le32	d_phys_cyl;             /* # of physical cylinders per device */
+ 	__le32	d_phys_trk;             /* # of physical tracks per cylinder */
+ 	__le32	d_phys_sec;             /* # of physical sectors per track */
+ 	__le32	d_phys_bytes;           /* # of physical bytes per sector */
+ 	__le32	d_unknown2;             /* ? */
+	__le32   d_unknown3;             /* ? */
+	__le32	d_pad[8];               /* pad */
+
+	struct unixware_vtoc {
+		__le32	v_magic;		/* the magic number */
+		__le32	v_version;		/* version number */
+		char	v_name[8];		/* volume name */
+		__le16	v_nslices;		/* # of slices */
+		__le16	v_unknown1;		/* ? */
+		__le32	v_reserved[10];		/* reserved */
+		struct unixware_slice
+			v_slice[UNIXWARE_NUMSLICE];	/* slice headers */
+	} vtoc;
+
+};  /* 408 */
+
+#endif /* CONFIG_UNIXWARE_DISKLABEL */
+
+#ifdef CONFIG_MINIX_SUBPARTITION
+#   define MINIX_NR_SUBPARTITIONS  4
+#endif /* CONFIG_MINIX_SUBPARTITION */
+
+#ifdef __KERNEL__
+
+char *disk_name (struct gendisk *hd, int part, char *buf);
+
+extern int rescan_partitions(struct gendisk *disk, struct block_device *bdev);
+extern void add_partition(struct gendisk *, int, sector_t, sector_t);
+extern void delete_partition(struct gendisk *, int);
+
+extern struct gendisk *alloc_disk(int minors);
+extern struct kobject *get_disk(struct gendisk *disk);
+extern void put_disk(struct gendisk *disk);
+
+extern void blk_register_region(dev_t dev, unsigned long range,
+			struct module *module,
+			struct kobject *(*probe)(dev_t, int *, void *),
+			int (*lock)(dev_t, void *),
+			void *data);
+extern void blk_unregister_region(dev_t dev, unsigned long range);
+
+static inline struct block_device *bdget_disk(struct gendisk *disk, int index)
+{
+	return bdget(MKDEV(disk->major, disk->first_minor) + index);
+}
+
+#endif
+
+#endif