linux-kernel - Re: [PATCH v2] ftrace: change the export format of trace_kfree

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Message-ID: <20090618140802.GA10300@hmsreliant.think-freely.org>
Date:	Thu, 18 Jun 2009 10:08:02 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>,
	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH v2] ftrace: change the export format of
	trace_kfree_skb()

On Thu, Jun 18, 2009 at 08:51:12AM -0400, Steven Rostedt wrote:
> 
> On Thu, 18 Jun 2009, Neil Horman wrote:
> > > 
> > > diff --git a/include/trace/events/skb.h b/include/trace/events/skb.h
> > > index 1e8fabb..2496060 100644
> > > --- a/include/trace/events/skb.h
> > > +++ b/include/trace/events/skb.h
> > > @@ -7,6 +7,71 @@
> > >  #undef TRACE_SYSTEM
> > >  #define TRACE_SYSTEM skb
> > >  
> > > +#define protocol_name(protocol) { protocol, #protocol }
> > > +#define show_protocol_name(val)					\
> > > +	__print_symbolic(val,					\
> > 
> > Don't you need to include ftrace.h to pull in the __print_symbolic definition?
> > Or is that always guaranteed to be included from tracepoint.h?
> 
> Its use is in one of the fields of TRACE_EVENT that are only used by 
> define_trace.h. All other users will ignore it.
> 
> #define TRACE_EVENT(name, proto, args, struct, assign, print)	\
> 	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
> 
> Only name, proto, args is used. The define_trace.h will include 
> trace/ftrace.h and that will use the struct, assign and print args.
> 
> So the answer is "no" ;-)
> 
> -- Steve
> 
> 

Ok, thanks
Acked-by: Neil Horman <nhorman@...driver.com>

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