linux-kernel - [PATCH] tracing/kprobes: remove unnecessary checking of, trace_probe_is

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Message-ID: <51BA7B9E.3040807@huawei.com>
Date:	Fri, 14 Jun 2013 10:10:38 +0800
From:	"zhangwei(Jovi)" <jovi.zhangwei@...wei.com>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>
CC:	Ingo Molnar <mingo@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Oleg Nesterov <oleg@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] tracing/kprobes: remove unnecessary checking of, trace_probe_is_enabled

Since tp->flags assignment was moved into function enable_trace_probe,
so there have no need to use trace_probe_is_enabled to check flags
in same function.

Remove the unnecessary checking.

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@...wei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Oleg Nesterov <oleg@...hat.com>
Cc: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
---
 kernel/trace/trace_kprobe.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 9f46e98..f237417 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -240,8 +240,7 @@ enable_trace_probe(struct trace_probe *tp, struct ftrace_event_file *file)
 	} else
 		tp->flags |= TP_FLAG_PROFILE;

-	if (trace_probe_is_enabled(tp) && trace_probe_is_registered(tp) &&
-	    !trace_probe_has_gone(tp)) {
+	if (trace_probe_is_registered(tp) && !trace_probe_has_gone(tp)) {
 		if (trace_probe_is_return(tp))
 			ret = enable_kretprobe(&tp->rp);
 		else
-- 
1.7.9.7


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