mkdsofs is using types of the style __u8, which it gets with some
versions of libc headers via linux/hdreg.h including asm/types.h.
Newer version of fedora (at least) have a hdreg.h whichdoes not
include asm/types.h. To work around this patch mkdosfs.c to explicity
include linux/types.h which will in turn pull in asm/types.h which
defines these variables.

--- dosfstools-2.10/mkdosfs/mkdosfs.c~	2006-07-12 18:46:21.000000000 +1000
+++ dosfstools-2.10/mkdosfs/mkdosfs.c	2006-07-12 18:46:21.000000000 +1000
@@ -60,6 +60,7 @@
 #include "../version.h"
 
 #include <fcntl.h>
+#include <linux/types.h>
 #include <linux/hdreg.h>
 #include <linux/fs.h>
 #include <linux/fd.h>
