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authorJiri Olsa <jolsa@redhat.com>2010-04-02 19:01:22 +0200
committerSteven Rostedt <rostedt@goodmis.org>2010-04-27 12:36:53 -0400
commit62b915f1060996a8e1f69be50e3b8e9e43b710cb (patch)
tree26741f065b30b67022d680c3bc2afbda319638e1 /include/linux/ftrace.h
parentd7a8d9e907cc294ec7a4a7046d1886375fbcc82e (diff)
downloadop-kernel-dev-62b915f1060996a8e1f69be50e3b8e9e43b710cb.zip
op-kernel-dev-62b915f1060996a8e1f69be50e3b8e9e43b710cb.tar.gz
tracing: Add graph output support for irqsoff tracer
Add function graph output to irqsoff tracer. The graph output is enabled by setting new 'display-graph' trace option. Signed-off-by: Jiri Olsa <jolsa@redhat.com> LKML-Reference: <1270227683-14631-4-git-send-email-jolsa@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/ftrace.h')
-rw-r--r--include/linux/ftrace.h15
1 files changed, 11 insertions, 4 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index ea5b1aa..8415a52 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -352,6 +352,10 @@ struct ftrace_graph_ret {
int depth;
};
+/* Type of the callback handlers for tracing function graph*/
+typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */
+typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */
+
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
/* for init task */
@@ -400,10 +404,6 @@ extern char __irqentry_text_end[];
#define FTRACE_RETFUNC_DEPTH 50
#define FTRACE_RETSTACK_ALLOC_SIZE 32
-/* Type of the callback handlers for tracing function graph*/
-typedef void (*trace_func_graph_ret_t)(struct ftrace_graph_ret *); /* return */
-typedef int (*trace_func_graph_ent_t)(struct ftrace_graph_ent *); /* entry */
-
extern int register_ftrace_graph(trace_func_graph_ret_t retfunc,
trace_func_graph_ent_t entryfunc);
@@ -441,6 +441,13 @@ static inline void unpause_graph_tracing(void)
static inline void ftrace_graph_init_task(struct task_struct *t) { }
static inline void ftrace_graph_exit_task(struct task_struct *t) { }
+static inline int register_ftrace_graph(trace_func_graph_ret_t retfunc,
+ trace_func_graph_ent_t entryfunc)
+{
+ return -1;
+}
+static inline void unregister_ftrace_graph(void) { }
+
static inline int task_curr_ret_stack(struct task_struct *tsk)
{
return -1;
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