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Date: Tue, 26 May 2026 11:33:32 -0400
From: Steven Rostedt <rostedt@kernel.org>
To: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>, Linux trace kernel
 <linux-trace-kernel@vger.kernel.org>, Mathieu Desnoyers
 <mathieu.desnoyers@efficios.com>, Mark Rutland <mark.rutland@arm.com>,
 Peter Zijlstra <peterz@infradead.org>, Namhyung Kim <namhyung@kernel.org>,
 Takaya Saeki <takayas@google.com>, Douglas Raillard
 <douglas.raillard@arm.com>, Tom Zanussi <zanussi@kernel.org>, Andrew Morton
 <akpm@linux-foundation.org>, Thomas Gleixner <tglx@linutronix.de>, Ian
 Rogers <irogers@google.com>, Jiri Olsa <olsajiri@gmail.com>
Subject: Re: [PATCH v6] tracing/eprobes: Allow use of BTF names to
 dereference pointers
Message-ID: <20260526113332.1880146e@gandalf.local.home>
In-Reply-To: <20260526090910.8aae5c9357e119bd0043b18b@kernel.org>
References: <20260521225033.56458336@fedora>
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On Tue, 26 May 2026 09:09:10 +0900
Masami Hiramatsu (Google) <mhiramat@kernel.org> wrote:

> On Thu, 21 May 2026 22:50:33 -0400
> Steven Rostedt <rostedt@kernel.org> wrote:
> 
> > @@ -640,7 +673,7 @@ static int parse_btf_arg(char *varname,
> >  	int i, is_ptr, ret;
> >  	u32 tid;
> >  
> > -	if (WARN_ON_ONCE(!ctx->funcname))
> > +	if (WARN_ON_ONCE(!ctx->funcname && !(ctx->flags & TPARG_FL_TEVENT)))
> >  		return -EINVAL;
> >  
> >  	is_ptr = split_next_field(varname, &field, ctx);
> > @@ -653,6 +686,20 @@ static int parse_btf_arg(char *varname,
> >  		return -EOPNOTSUPP;
> >  	}
> >  
> > +	if (ctx->flags & TPARG_FL_TEVENT) {
> > +		int ret;  
> 
> nit: parse_btf_arg already declared @ret. So we don't need this.

Ah, will fix.

Thanks,

-- Steve