linux-kernel - RE: [PATCH v11 1/3] tracing: Add DEFINE_EVENT

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Message-ID: <A5ED84D3BB3A384992CBB9C77DEDA4D41AF6A12A@USINDEM103.corp.hds.com>
Date:	Fri, 15 Mar 2013 21:17:08 +0000
From:	Seiji Aguchi <seiji.aguchi@....com>
To:	Steven Rostedt <rostedt@...dmis.org>
CC:	"H. Peter Anvin (hpa@...or.com)" <hpa@...or.com>,
	"x86@...nel.org" <x86@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Thomas Gleixner (tglx@...utronix.de)" <tglx@...utronix.de>,
	"'mingo@...e.hu' (mingo@...e.hu)" <mingo@...e.hu>,
	"Borislav Petkov (bp@...en8.de)" <bp@...en8.de>,
	"Satoru Moriya (smoriya@...hat.com)" <smoriya@...hat.com>,
	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"Luck, Tony (tony.luck@...el.com)" <tony.luck@...el.com>,
	"Paul E. McKenney (paulmck@...ibm.com)" <paulmck@...ibm.com>
Subject: RE: [PATCH v11 1/3] tracing: Add DEFINE_EVENT_FN() macro

> You still need to add:
> 
> From: Steven Rostedt <rostedt@...dmis.org>
> 
> Otherwise you get the authorship of this patch.

My apologies.  I resend my patch 1/3 by adding it shortly.

Seiji

> -----Original Message-----
> From: Steven Rostedt [mailto:rostedt@...dmis.org]
> Sent: Friday, March 15, 2013 5:10 PM
> To: Seiji Aguchi
> Cc: H. Peter Anvin (hpa@...or.com); x86@...nel.org; linux-kernel@...r.kernel.org; Thomas Gleixner (tglx@...utronix.de);
> 'mingo@...e.hu' (mingo@...e.hu); Borislav Petkov (bp@...en8.de); Satoru Moriya (smoriya@...hat.com); dle-
> develop@...ts.sourceforge.net; linux-edac@...r.kernel.org; Luck, Tony (tony.luck@...el.com); Paul E. McKenney
> (paulmck@...ibm.com)
> Subject: Re: [PATCH v11 1/3] tracing: Add DEFINE_EVENT_FN() macro
> 
> You still need to add:
> 
> From: Steven Rostedt <rostedt@...dmis.org>
> 
> Otherwise you get the authorship of this patch.
> 
> -- Steve
> 
> 
> On Fri, 2013-03-15 at 20:35 +0000, Seiji Aguchi wrote:
> > Each TRACE_EVENT() adds several helper functions. If two or more trace
> > events share the same structure and print format, they can also share
> > most of these helper functions and save a lot of space from duplicate
> > code. This is why the
> > DECLARE_EVENT_CLASS() and DEFINE_EVENT() were created.
> >
> > Some events require a trigger to be called at registering and
> > unregistering of the event and to do so they use TRACE_EVENT_FN().
> >
> > If multiple events require a trigger, they currently have no choice
> > but to use
> > TRACE_EVENT_FN() as there's no DEFINE_EVENT_FN() available. This
> > unfortunately causes a lot of wasted duplicate code created.
> >
> > By adding a DEFINE_EVENT_FN(), these events can still use a
> > DECLARE_EVENT_CLASS() and then define their own triggers.
> >
> > Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
> > Signed-off-by: Seiji Aguchi <seiji.aguchi@....com>
> > ---
> >  include/linux/tracepoint.h   |    2 ++
> >  include/trace/define_trace.h |    5 +++++
> >  include/trace/ftrace.h       |    4 ++++
> >  3 files changed, 11 insertions(+), 0 deletions(-)
> >
> > diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
> > index 2f322c3..9bf59e5 100644
> > --- a/include/linux/tracepoint.h
> > +++ b/include/linux/tracepoint.h
> > @@ -378,6 +378,8 @@ static inline void
> > tracepoint_synchronize_unregister(void)
> >  #define DECLARE_EVENT_CLASS(name, proto, args, tstruct, assign, print)
> >  #define DEFINE_EVENT(template, name, proto, args)		\
> >  	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
> > +#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg)\
> > +	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
> >  #define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
> >  	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
> >  #define DEFINE_EVENT_CONDITION(template, name, proto,		\
> > diff --git a/include/trace/define_trace.h
> > b/include/trace/define_trace.h index 1905ca8..02e1003 100644
> > --- a/include/trace/define_trace.h
> > +++ b/include/trace/define_trace.h
> > @@ -44,6 +44,10 @@
> >  #define DEFINE_EVENT(template, name, proto, args) \
> >  	DEFINE_TRACE(name)
> >
> > +#undef DEFINE_EVENT_FN
> > +#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
> > +	DEFINE_TRACE_FN(name, reg, unreg)
> > +
> >  #undef DEFINE_EVENT_PRINT
> >  #define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
> >  	DEFINE_TRACE(name)
> > @@ -91,6 +95,7 @@
> >  #undef TRACE_EVENT_CONDITION
> >  #undef DECLARE_EVENT_CLASS
> >  #undef DEFINE_EVENT
> > +#undef DEFINE_EVENT_FN
> >  #undef DEFINE_EVENT_PRINT
> >  #undef DEFINE_EVENT_CONDITION
> >  #undef TRACE_HEADER_MULTI_READ
> > diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index
> > 40dc5e8..7bab676 100644
> > --- a/include/trace/ftrace.h
> > +++ b/include/trace/ftrace.h
> > @@ -71,6 +71,10 @@
> >  	static struct ftrace_event_call	__used		\
> >  	__attribute__((__aligned__(4))) event_##name
> >
> > +#undef DEFINE_EVENT_FN
> > +#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg)	\
> > +	DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
> > +
> >  #undef DEFINE_EVENT_PRINT
> >  #define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
> >  	DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
> > -- 1.7.1
> >
> 

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