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-rw-r--r--kernel/backtracetest.c30
1 files changed, 29 insertions, 1 deletions
diff --git a/kernel/backtracetest.c b/kernel/backtracetest.c
index d1a7605c5b8..50f7abd0813 100644
--- a/kernel/backtracetest.c
+++ b/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;
@@ -22,6 +23,31 @@ 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");
@@ -29,6 +55,8 @@ static int backtrace_regression_test(void)
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);