linux-kernel - Re: [PATCH 1/2] tracing: fprobe: rename fprobe_entry to fprobe_fgraph

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Message-ID: <5056228.31r3eYUQgx@7950hx>
Date: Wed, 24 Sep 2025 08:17:45 +0800
From: Menglong Dong <menglong.dong@...ux.dev>
To: Menglong Dong <menglong8.dong@...il.com>,
 Masami Hiramatsu <mhiramat@...nel.org>
Cc: rostedt@...dmis.org, mathieu.desnoyers@...icios.com,
 linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
 bpf@...r.kernel.org
Subject:
 Re: [PATCH 1/2] tracing: fprobe: rename fprobe_entry to fprobe_fgraph_entry

On 2025/9/24 07:07, Masami Hiramatsu wrote:
> On Tue, 23 Sep 2025 17:20:00 +0800
> Menglong Dong <menglong8.dong@...il.com> wrote:
> 
> > The fprobe_entry() is used by fgraph_ops, so rename it to
> > fprobe_fgraph_entry to be more distinctive.
> 
> Sorry, NAK. fprobe is based on fgraph by design.
> So "fprobe_fgraph" sounds redundant.

Hi, Masami. Did you see my next patch that use ftrace
for the fprobe to obtain better performance?

Hmm, it seems that the cover-letter is necessary :/

Thanks!
Menglong Dong

> 
> Thanks,
> 
> > 
> > Signed-off-by: Menglong Dong <dongml2@...natelecom.cn>
> > ---
> >  kernel/trace/fprobe.c | 8 ++++----
> >  1 file changed, 4 insertions(+), 4 deletions(-)
> > 
> > diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c
> > index 6a205903b1ed..1785fba367c9 100644
> > --- a/kernel/trace/fprobe.c
> > +++ b/kernel/trace/fprobe.c
> > @@ -254,8 +254,8 @@ static inline int __fprobe_kprobe_handler(unsigned long ip, unsigned long parent
> >  	return ret;
> >  }
> >  
> > -static int fprobe_entry(struct ftrace_graph_ent *trace, struct fgraph_ops *gops,
> > -			struct ftrace_regs *fregs)
> > +static int fprobe_fgraph_entry(struct ftrace_graph_ent *trace, struct fgraph_ops *gops,
> > +			       struct ftrace_regs *fregs)
> >  {
> >  	unsigned long *fgraph_data = NULL;
> >  	unsigned long func = trace->func;
> > @@ -340,7 +340,7 @@ static int fprobe_entry(struct ftrace_graph_ent *trace, struct fgraph_ops *gops,
> >  	/* If any exit_handler is set, data must be used. */
> >  	return used != 0;
> >  }
> > -NOKPROBE_SYMBOL(fprobe_entry);
> > +NOKPROBE_SYMBOL(fprobe_fgraph_entry);
> >  
> >  static void fprobe_return(struct ftrace_graph_ret *trace,
> >  			  struct fgraph_ops *gops,
> > @@ -379,7 +379,7 @@ static void fprobe_return(struct ftrace_graph_ret *trace,
> >  NOKPROBE_SYMBOL(fprobe_return);
> >  
> >  static struct fgraph_ops fprobe_graph_ops = {
> > -	.entryfunc	= fprobe_entry,
> > +	.entryfunc	= fprobe_fgraph_entry,
> >  	.retfunc	= fprobe_return,
> >  };
> >  static int fprobe_graph_active;
> 
> 
>