gentoo's util-linux-2.12-linux-headers-2.6.0-fix.patch, with
 my_dev_t defined as __u32 not int (__kernel_dev_t is __u32)

--- ./disk-utils/blockdev.c.orig	2002-03-09 00:57:02.000000000 +0200
+++ ./disk-utils/blockdev.c	2004-04-14 20:02:17.000000000 +0300
@@ -9,6 +9,7 @@
 #include <string.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
+#include <linux/version.h>
 
 #include "nls.h"
 
@@ -24,8 +25,13 @@
 #define BLKRASET   _IO(0x12,98)
 #define BLKRAGET   _IO(0x12,99)
 #define BLKSSZGET  _IO(0x12,104)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
 #define BLKBSZGET  _IOR(0x12,112,sizeof(int))
 #define BLKBSZSET  _IOW(0x12,113,sizeof(int))
+#else
+#define BLKBSZGET  _IOR(0x12,112,int)
+#define BLKBSZSET  _IOW(0x12,113,int)
+#endif
 #endif
 
 /* Maybe <linux/hdreg.h> could be included */
--- ./disk-utils/elvtune.c.orig	2002-03-09 00:57:49.000000000 +0200
+++ ./disk-utils/elvtune.c	2004-04-14 20:02:17.000000000 +0300
@@ -26,6 +26,8 @@
 #include <sys/ioctl.h>
 #include <unistd.h>
 #include <stdlib.h>
+#include <linux/version.h>
+
 #include "nls.h"
 
 /* this has to match with the kernel structure */
@@ -37,8 +39,13 @@
 	int max_bomb_segments;
 } blkelv_ioctl_arg_t;
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
 #define BLKELVGET   _IOR(0x12,106,sizeof(blkelv_ioctl_arg_t))
 #define BLKELVSET   _IOW(0x12,107,sizeof(blkelv_ioctl_arg_t))
+#else
+#define BLKELVGET   _IOR(0x12,106,blkelv_ioctl_arg_t)
+#define BLKELVSET   _IOW(0x12,107,blkelv_ioctl_arg_t)
+#endif
 
 static void
 usage(void) {
--- ./fdisk/common.h.orig	2003-07-13 16:59:53.000000000 +0300
+++ ./fdisk/common.h	2004-04-14 20:02:17.000000000 +0300
@@ -2,11 +2,18 @@
 
 /* including <linux/fs.h> fails */
 #include <sys/ioctl.h>
+#include <linux/version.h>
+
 #define BLKRRPART    _IO(0x12,95)    /* re-read partition table */
 #define BLKGETSIZE   _IO(0x12,96)    /* return device size */
 #define BLKFLSBUF    _IO(0x12,97)    /* flush buffer cache */
 #define BLKSSZGET    _IO(0x12,104)   /* get block device sector size */
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
 #define BLKGETSIZE64 _IOR(0x12,114,8)	/* 8 = sizeof(u64) */
+#else
+#define BLKGETSIZE64 _IOR(0x12,114,unsigned long long)
+#endif
 
 /* including <linux/hdreg.h> also fails */
 struct hd_geometry {
--- ./mount/my_dev_t.h.orig	2003-07-16 23:05:50.000000000 +0300
+++ ./mount/my_dev_t.h	2004-04-14 20:05:59.000000000 +0300
@@ -4,4 +4,11 @@
 /* for ancient systems use "unsigned short" */
 
 #include <linux/posix_types.h>
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
 #define my_dev_t __kernel_dev_t
+#else
+#include <asm/types.h>
+#define my_dev_t __u32
+#endif