Lamely provides a generic interface to show_stack() for those
architectures which have an appropriate implementation.

The alternative of course is to just take out Andrea's debug calls to
show_stack().  But it would be nice to have an arch-independent way of
spitting out a stack trace.


=====================================

--- 2.4.19-pre6/include/linux/kernel.h~aa-100-dump_stack	Fri Apr  5 01:07:48 2002
+++ 2.4.19-pre6-akpm/include/linux/kernel.h	Fri Apr  5 01:07:48 2002
@@ -107,6 +107,8 @@ extern int oops_in_progress;		/* If set,
 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)
--- /dev/null	Thu Aug 30 13:30:55 2001
+++ 2.4.19-pre6-akpm/lib/dump_stack.c	Fri Apr  5 01:07:48 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");
+}
--- 2.4.19-pre6/lib/Makefile~aa-100-dump_stack	Fri Apr  5 01:07:48 2002
+++ 2.4.19-pre6-akpm/lib/Makefile	Fri Apr  5 01:07:48 2002
@@ -10,7 +10,8 @@ L_TARGET := lib.a
 
 export-objs := cmdline.o dec_and_lock.o rwsem-spinlock.o rwsem.o rbtree.o
 
-obj-y := errno.o ctype.o string.o vsprintf.o brlock.o cmdline.o bust_spinlocks.o rbtree.o
+obj-y := errno.o ctype.o string.o vsprintf.o brlock.o cmdline.o \
+		bust_spinlocks.o rbtree.o dump_stack.o
 
 obj-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
 obj-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
--- 2.4.19-pre6/kernel/ksyms.c~aa-100-dump_stack	Fri Apr  5 01:07:48 2002
+++ 2.4.19-pre6-akpm/kernel/ksyms.c	Fri Apr  5 01:07:48 2002
@@ -562,3 +562,6 @@ EXPORT_SYMBOL(init_task_union);
 
 EXPORT_SYMBOL(tasklist_lock);
 EXPORT_SYMBOL(pidhash);
+
+/* debug */
+EXPORT_SYMBOL(dump_stack);
--- 2.4.19-pre6/arch/i386/kernel/traps.c~aa-100-dump_stack	Fri Apr  5 01:07:48 2002
+++ 2.4.19-pre6-akpm/arch/i386/kernel/traps.c	Fri Apr  5 01:07:48 2002
@@ -186,6 +186,14 @@ void show_stack(unsigned long * esp)
 	show_trace(esp);
 }
 
+/*
+ * The architecture-independent backtrace generator
+ */
+void dump_stack(void)
+{
+	show_stack(0);
+}
+
 void show_registers(struct pt_regs *regs)
 {
 	int i;