Re: [PATCH 1/2 v3] tracing/events: provide string with undefined size support

[Frederic Weisbecker <fweisbec@gmail.com>]

On Sun, Apr 19, 2009 at 02:15:36PM +0800, Li Zefan wrote:
> > @@ -417,18 +495,22 @@ static struct ftrace_event_call event_##call;				\
> >  									\
> >  static void ftrace_raw_event_##call(proto)				\
> >  {									\
> > +	struct ftrace_str_offsets_##call __maybe_unused __str_offsets;  \
> >  	struct ftrace_event_call *call = &event_##call;			\
> >  	struct ring_buffer_event *event;				\
> >  	struct ftrace_raw_##call *entry;				\
> >  	unsigned long irq_flags;					\
> > +	int __str_size = 0;						\
> >  	int pc;								\
> >  									\
> >  	local_save_flags(irq_flags);					\
> >  	pc = preempt_count();						\
> >  									\
> > +	tstruct;							\
> > +									\
> >  	event = trace_current_buffer_lock_reserve(event_##call.id,	\
> > -				  sizeof(struct ftrace_raw_##call),	\
> > -				  irq_flags, pc);			\
> > +				 sizeof(struct ftrace_raw_##call) + __str_size,\
> 
> sizeof(*entry) will make it much shorter. ;)


Heh, you're right :-)
I will update that.


> 
> > +				 irq_flags, pc);			\
> >  	if (!event)							\
> >  		return;							\
> >  	entry	= ring_buffer_event_data(event);			\
>