linux-kernel - [for-next][PATCH 09/25] trace/kprobe: remove duplicated calls of ring_buffer_event

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Message-ID: <20221210135824.622690768@goodmis.org>
Date:   Sat, 10 Dec 2022 08:57:59 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-kernel@...r.kernel.org
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Song Chen <chensong_2000@....cn>
Subject: [for-next][PATCH 09/25] trace/kprobe: remove duplicated calls of ring_buffer_event_data

From: Song Chen <chensong_2000@....cn>

Function __kprobe_trace_func calls ring_buffer_event_data to
get a ring buffer, however, it has been done in above call
trace_event_buffer_reserve. So does __kretprobe_trace_func.

This patch removes those duplicated calls.

Link: https://lore.kernel.org/all/1666145478-4706-1-git-send-email-chensong_2000@189.cn/

Reviewed-by: Steven Rostedt (Google) <rostedt@...dmis.org>
Acked-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
Signed-off-by: Song Chen <chensong_2000@....cn>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>
---
 kernel/trace/trace_kprobe.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 5a75b039e586..ee77c8203bd5 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1344,7 +1344,6 @@ __kprobe_trace_func(struct trace_kprobe *tk, struct pt_regs *regs,
 		return;
 
 	fbuffer.regs = regs;
-	entry = fbuffer.entry = ring_buffer_event_data(fbuffer.event);
 	entry->ip = (unsigned long)tk->rp.kp.addr;
 	store_trace_args(&entry[1], &tk->tp, regs, sizeof(*entry), dsize);
 
@@ -1385,7 +1384,6 @@ __kretprobe_trace_func(struct trace_kprobe *tk, struct kretprobe_instance *ri,
 		return;
 
 	fbuffer.regs = regs;
-	entry = fbuffer.entry = ring_buffer_event_data(fbuffer.event);
 	entry->func = (unsigned long)tk->rp.kp.addr;
 	entry->ret_ip = get_kretprobe_retaddr(ri);
 	store_trace_args(&entry[1], &tk->tp, regs, sizeof(*entry), dsize);
-- 
2.35.1