[PATCH] lockdep: stacktrace subsystem, core

Framework to generate and save stacktraces quickly, without printing anything
to the console.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/include/linux/stacktrace.h b/include/linux/stacktrace.h
new file mode 100644
index 000000000000..9cc81e572224
--- /dev/null
+++ b/include/linux/stacktrace.h
@@ -0,0 +1,20 @@
+#ifndef __LINUX_STACKTRACE_H
+#define __LINUX_STACKTRACE_H
+
+#ifdef CONFIG_STACKTRACE
+struct stack_trace {
+        unsigned int nr_entries, max_entries;
+        unsigned long *entries;
+};
+
+extern void save_stack_trace(struct stack_trace *trace,
+                             struct task_struct *task, int all_contexts,
+                             unsigned int skip);
+
+extern void print_stack_trace(struct stack_trace *trace, int spaces);
+#else
+# define save_stack_trace(trace, task, all, skip)       do { } while (0)
+# define print_stack_trace(trace)                       do { } while (0)
+#endif
+
+#endif