linux-kernel - Re: Re: [PATCH -tip v5 12/18] ftrace/kprobes: Use NOKPROBE

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Date:	Tue, 10 Dec 2013 17:54:53 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Ingo Molnar <mingo@...nel.org>, linux-arch@...r.kernel.org,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Sandeepa Prabhu <sandeepa.prabhu@...aro.org>,
	Frederic Weisbecker <fweisbec@...il.com>, x86@...nel.org,
	lkml <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...hat.com>, systemtap@...rceware.org,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: Re: [PATCH -tip v5 12/18] ftrace/kprobes: Use NOKPROBE_SYMBOL
 macro in ftrace

(2013/12/10 2:04), Steven Rostedt wrote:
> On Mon, 09 Dec 2013 10:47:46 +0000
> Masami Hiramatsu <masami.hiramatsu.pt@...achi.com> wrote:
> 
> 
>> --- a/kernel/trace/trace_probe.h
>> +++ b/kernel/trace/trace_probe.h
>> @@ -124,8 +124,8 @@ struct probe_arg {
>>  	const struct fetch_type	*type;	/* Type of this argument */
>>  };
>>  
>> -static inline __kprobes void call_fetch(struct fetch_param *fprm,
>> -				 struct pt_regs *regs, void *dest)
>> +static inline void call_fetch(struct fetch_param *fprm,
>> +			      struct pt_regs *regs, void *dest)
>>  {
>>  	return fprm->fn(regs, fprm->data, dest);
>>  }
>>
> 
> Is this OK to be probed? I've had cases where a header "static inline"
> was not always inlined. Unless you have "__always_inline" this is not
> guaranteed to be inlined.

Ah, right! I need to change it to __always_inline to prevent
probing on it.

> 
> As for the rest of the patch:
> 
> Acked-by: Steven Rostedt <rostedt@...dmis.org>

Thank you! :)


-- 
Masami HIRAMATSU
IT Management Research Dept. Linux Technology Center
Hitachi, Ltd., Yokohama Research Laboratory
E-mail: masami.hiramatsu.pt@...achi.com


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