[PATCH] add dump_stack(): cross-arch backtrace

From Christoph Hellwig, also present in 2.4.

Create an arch-independent `dump_stack()' function.  So we don't need to do

#ifdef CONFIG_X86
	show_stack(0);		/* No prototype in scope! */
#endif

any more.

The whole dump_stack() implementation is delegated to the architecture.
If it doesn't provide one, there is a default do-nothing library
function.

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/dump_stack.c b/lib/dump_stack.c
new file mode 100644
index 000000000000..47c2728ab8c7
--- /dev/null
+++ b/lib/dump_stack.c
@@ -0,0 +1,13 @@
+/*
+ * Provide a default dump_stack() function for architectures
+ * which don't implement their own.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+void dump_stack(void)
+{
+	printk(KERN_NOTICE
+		"This architecture does not implement dump_stack()\n");
+}