---

yaml
---
r: 101137
b: refs/heads/master
c: ad118c5
h: refs/heads/master
i:
  101135: 0f6cada
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: a5a242dceed5d1c74fe46088762a9e4312c2d000
+refs/heads/master: ad118c54a3587b2c69a769d0ba37d4d8dce4559d

trunk/kernel/backtracetest.c

@@ -10,9 +10,10 @@
  * of the License.
  */
 
+#include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/sched.h>
-#include <linux/delay.h>
+#include <linux/stacktrace.h>
 
 static struct timer_list backtrace_timer;
 
@@ -22,13 +23,40 @@ static void backtrace_test_timer(unsigned long data)
 	printk("The following trace is a kernel self test and not a bug!\n");
 	dump_stack();
 }
+
+#ifdef CONFIG_STACKTRACE
+static void backtrace_test_saved(void)
+{
+	struct stack_trace trace;
+	unsigned long entries[8];
+
+	printk("Testing a saved backtrace.\n");
+	printk("The following trace is a kernel self test and not a bug!\n");
+
+	trace.nr_entries = 0;
+	trace.max_entries = ARRAY_SIZE(entries);
+	trace.entries = entries;
+	trace.skip = 0;
+
+	save_stack_trace(&trace);
+	print_stack_trace(&trace, 0);
+}
+#else
+static void backtrace_test_saved(void)
+{
+	printk("Saved backtrace test skipped.\n");
+}
+#endif
+
 static int backtrace_regression_test(void)
 {
 	printk("====[ backtrace testing ]===========\n");
 	printk("Testing a backtrace from process context.\n");
 	printk("The following trace is a kernel self test and not a bug!\n");
 	dump_stack();
 
+	backtrace_test_saved();
+
 	init_timer(&backtrace_timer);
 	backtrace_timer.function = backtrace_test_timer;
 	mod_timer(&backtrace_timer, jiffies + 10);

trunk/lib/Kconfig.debug

@@ -562,6 +562,9 @@ config BACKTRACE_SELF_TEST
 	  for distributions or general kernels, but only for kernel
 	  developers working on architecture code.
 
+	  Note that if you want to also test saved backtraces, you will
+	  have to enable STACKTRACE as well.
+
 	  Say N if you are unsure.
 
 config LKDTM