This is missing from the raw-io kernel patch in the 6.2 2.2.14 kernel:

Index: ksyms.c
===================================================================
RCS file: /cvs/linux/kernel/ksyms.c,v
retrieving revision 1.17
diff -u -w -r1.17 ksyms.c
--- ksyms.c     2000/05/04 08:34:53     1.17
+++ ksyms.c     2000/06/02 09:37:13
@@ -39,6 +39,7 @@
 #include <linux/poll.h>
 #include <linux/mm.h>
 #include <linux/capability.h>
+#include <linux/iobuf.h>

 #if defined(CONFIG_PROC_FS)
 #include <linux/proc_fs.h>
@@ -320,6 +329,14 @@
 EXPORT_SYMBOL(disable_hlt);
 EXPORT_SYMBOL(enable_hlt); 
 #endif
+
+/* Raw I/O */
+EXPORT_SYMBOL(alloc_kiovec);
+EXPORT_SYMBOL(free_kiovec); 
+EXPORT_SYMBOL(expand_kiobuf);
+EXPORT_SYMBOL(map_user_kiobuf);
+EXPORT_SYMBOL(unmap_kiobuf);   
+EXPORT_SYMBOL(brw_kiovec);     

 /* IO port handling */
 EXPORT_SYMBOL(check_region);