linux-kernel - Re: [PATCH 3/9 - v2][RFC] tracing: Remove per event trace registering

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 07 May 2010 08:59:05 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Mathieu Desnoyers <compudj@...stal.dyndns.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Christoph Hellwig <hch@....de>
Subject: Re: [PATCH 3/9 - v2][RFC] tracing: Remove per event trace
 registering

On Fri, 2010-05-07 at 16:20 +0800, Li Zefan wrote:
> > @@ -935,11 +947,11 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
> >  		return -1;
> >  	}
> >  
> > -	if (call->regfunc)
> > +	if (call->class->probe || call->class->reg)
> >  		trace_create_file("enable", 0644, call->dir, call,
> >  				  enable);
> >  
> > -	if (call->id && call->perf_event_enable)
> > +	if (call->id && (call->class->perf_probe || call->class->reg))
> >  		trace_create_file("id", 0444, call->dir, call,
> >  		 		  id);
> >  
> 
> Accessing of ->perf_probe needs to be guarded with CONFIG_PERF_EVENTS,
> otherwise it won't pass compile.
> 
> The original code is fine, because ->perf_event_enable is always there
> regardless of CONFIG_PERF_EVENTS.

Good catch! I wanted to test the !CONFIG_PERF_EVENTS but that needs to
be done on a non x86 box. I'll need to do that before posting my non-RFC
patch set.

-- Steve


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/