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Message-ID: <20240213204218.0673fbb0@gandalf.local.home>
Date: Tue, 13 Feb 2024 20:42:18 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Cc: Alexei Starovoitov <alexei.starovoitov@...il.com>, Florent Revest
<revest@...omium.org>, linux-trace-kernel@...r.kernel.org, LKML
<linux-kernel@...r.kernel.org>, Martin KaFai Lau <martin.lau@...ux.dev>,
bpf <bpf@...r.kernel.org>, Sven Schnelle <svens@...ux.ibm.com>, Alexei
Starovoitov <ast@...nel.org>, Jiri Olsa <jolsa@...nel.org>, Arnaldo
Carvalho de Melo <acme@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
Alan Maguire <alan.maguire@...cle.com>, Mark Rutland
<mark.rutland@....com>, Peter Zijlstra <peterz@...radead.org>, Thomas
Gleixner <tglx@...utronix.de>, Guo Ren <guoren@...nel.org>
Subject: Re: [PATCH v7 10/36] ftrace/function_graph: Pass fgraph_ops to
function graph callbacks
On Wed, 7 Feb 2024 00:09:21 +0900
"Masami Hiramatsu (Google)" <mhiramat@...nel.org> wrote:
> From: Steven Rostedt (VMware) <rostedt@...dmis.org>
>
> Pass the fgraph_ops structure to the function graph callbacks. This will
> allow callbacks to add a descriptor to a fgraph_ops private field that wil
> be added in the future and use it for the callbacks. This will be useful
> when more than one callback can be registered to the function graph tracer.
>
> Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> ---
> Changes in v2:
> - cleanup to set argument name on function prototype.
> ---
>
This patch fails to compile without this change:
diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c
index e35a941a5af3..47b461b1cf7e 100644
--- a/kernel/trace/fgraph.c
+++ b/kernel/trace/fgraph.c
@@ -381,7 +381,7 @@ int function_graph_enter(unsigned long ret, unsigned long func,
if (gops == &fgraph_stub)
continue;
- if (gops->entryfunc(&trace))
+ if (gops->entryfunc(&trace, gops))
bitmap |= BIT(i);
}
-- Steve
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