diff -urN vm-ref/arch/i386/kernel/traps.c vm/arch/i386/kernel/traps.c
--- vm-ref/arch/i386/kernel/traps.c	Fri Mar 29 13:35:26 2002
+++ vm/arch/i386/kernel/traps.c	Fri Mar 29 18:42:37 2002
@@ -186,6 +186,14 @@
 	show_trace(esp);
 }
 
+/*
+ * The architecture-independent backtrace generator
+ */
+void dump_stack(void)
+{
+	show_stack(0);
+}
+
 void show_registers(struct pt_regs *regs)
 {
 	int i;
diff -urN vm-ref/include/linux/kernel.h vm/include/linux/kernel.h
--- vm-ref/include/linux/kernel.h	Tue Mar 26 21:04:54 2002
+++ vm/include/linux/kernel.h	Fri Mar 29 18:42:37 2002
@@ -106,6 +106,8 @@
 extern int tainted;
 extern const char *print_tainted(void);
 
+extern void dump_stack(void);
+
 #if DEBUG
 #define pr_debug(fmt,arg...) \
 	printk(KERN_DEBUG fmt,##arg)
diff -urN vm-ref/kernel/ksyms.c vm/kernel/ksyms.c
--- vm-ref/kernel/ksyms.c	Fri Mar 29 18:35:52 2002
+++ vm/kernel/ksyms.c	Fri Mar 29 18:42:37 2002
@@ -564,3 +564,6 @@
 
 EXPORT_SYMBOL(tasklist_lock);
 EXPORT_SYMBOL(pidhash);
+
+/* debug */
+EXPORT_SYMBOL(dump_stack);
diff -urN vm-ref/lib/Makefile vm/lib/Makefile
--- vm-ref/lib/Makefile	Fri Mar 29 18:35:53 2002
+++ vm/lib/Makefile	Fri Mar 29 18:42:59 2002
@@ -10,7 +10,7 @@
 
 export-objs := cmdline.o dec_and_lock.o rwsem.o rbtree.o
 
-obj-y := errno.o ctype.o string.o vsprintf.o brlock.o cmdline.o bust_spinlocks.o rbtree.o rwsem.o
+obj-y := errno.o ctype.o string.o vsprintf.o brlock.o cmdline.o bust_spinlocks.o rbtree.o rwsem.o dump_stack.o
 
 ifneq ($(CONFIG_HAVE_DEC_LOCK),y) 
   obj-y += dec_and_lock.o
diff -urN vm-ref/lib/dump_stack.c vm/lib/dump_stack.c
--- vm-ref/lib/dump_stack.c	Thu Jan  1 01:00:00 1970
+++ vm/lib/dump_stack.c	Fri Mar 29 18:42:37 2002
@@ -0,0 +1,13 @@
+/*
+ * Provide a default dump_stack() function for architectures
+ * which don't implementtheir own.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+void dump_stack(void)
+{
+	printk(KERN_NOTICE
+		"This architecture does not implement dump_stack()\n");
+}