linux-kernel - [RFC PATCH 18/32] function_graph: Fix to initalize ftrace_ops for fgraph with ftrace_graph

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Message-Id: <169920060974.482486.15664806338999944098.stgit@devnote2>
Date:   Mon,  6 Nov 2023 01:10:10 +0900
From:   "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Florent Revest <revest@...omium.org>
Cc:     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: [RFC PATCH 18/32] function_graph: Fix to initalize ftrace_ops for fgraph with ftrace_graph_func

From: Masami Hiramatsu (Google) <mhiramat@...nel.org>

Fix to initialize the ftrace_ops of fgraph_ops with ftrace_graph_func
instead of ftrace_stub.

Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
---
 kernel/trace/fgraph.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c
index 597250bd30dc..858fb73440ec 100644
--- a/kernel/trace/fgraph.c
+++ b/kernel/trace/fgraph.c
@@ -872,7 +872,7 @@ unsigned long ftrace_graph_ret_addr(struct task_struct *task, int *idx,
 void fgraph_init_ops(struct ftrace_ops *dst_ops,
 		     struct ftrace_ops *src_ops)
 {
-	dst_ops->func = ftrace_stub;
+	dst_ops->func = ftrace_graph_func;
 	dst_ops->flags = FTRACE_OPS_FL_PID | FTRACE_OPS_FL_STUB;
 
 #ifdef FTRACE_GRAPH_TRAMP_ADDR
@@ -1120,7 +1120,7 @@ int register_ftrace_graph(struct fgraph_ops *gops)
 
 	if (!gops->ops.func) {
 		gops->ops.flags |= FTRACE_OPS_FL_STUB;
-		gops->ops.func = ftrace_stub;
+		gops->ops.func = ftrace_graph_func;
 #ifdef FTRACE_GRAPH_TRAMP_ADDR
 		gops->ops.trampoline = FTRACE_GRAPH_TRAMP_ADDR;
 #endif