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SubjectRe: [RFC][PATCH 06/14] fgraph: Move function graph specific code into fgraph.c
On Thu, 22 Nov 2018 22:11:33 -0800
Joel Fernandes <joel@joelfernandes.org> wrote:

> On Wed, Nov 21, 2018 at 08:27:14PM -0500, Steven Rostedt wrote:
> > From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
> >
> > To make the function graph infrastructure more managable, the code needs to
> > be in its own file (fgraph.c). Move the code that is specific for managing
> > the function graph infrastructure out of ftrace.c and into fgraph.c
> >
> > Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
>
> I think this patch causes a build error if CONFIG_FUNCTION_PROFILER is
> disabled but function graph is enabled. The following diff fixes it for me.

Thanks for reporting this.

>
> thanks,
>
> - Joel
>
> ----8<------
>
> diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
> index 3b8c307c7ff0..ce38bb962f91 100644
> --- a/kernel/trace/ftrace.c
> +++ b/kernel/trace/ftrace.c
> @@ -382,6 +382,15 @@ static void ftrace_update_pid_func(void)
> update_ftrace_function();
> }
>
> +#ifdef CONFIG_FUNCTION_GRAPH_TRACER
> +static bool fgraph_graph_time = true;
> +
> +void ftrace_graph_graph_time_control(bool enable)
> +{
> + fgraph_graph_time = enable;
> +}
> +#endif
> +

I think the better answer is to move it into trace_functions_graph.c.

I'll do that and give you the "reported-by".

-- Steve


> #ifdef CONFIG_FUNCTION_PROFILER
> struct ftrace_profile {
> struct hlist_node node;
> @@ -783,12 +792,6 @@ function_profile_call(unsigned long ip, unsigned long parent_ip,
> }
>
> #ifdef CONFIG_FUNCTION_GRAPH_TRACER
> -static bool fgraph_graph_time = true;
> -
> -void ftrace_graph_graph_time_control(bool enable)
> -{
> - fgraph_graph_time = enable;
> -}
>
> static int profile_graph_entry(struct ftrace_graph_ent *trace)
> {

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