Messages in this thread Patch in this message | | | Date | Thu, 6 Jul 2023 11:52:16 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH] tracing/probes: Delete dead code in trace_eprobe_tp_update_arg() |
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On Sun, 2 Jul 2023 08:02:38 +0900 Masami Hiramatsu (Google) <mhiramat@kernel.org> wrote:
> On Mon, 26 Jun 2023 16:35:06 +0300 > Dan Carpenter <dan.carpenter@linaro.org> wrote: > > > This code was recently refactored and now the "ret" variable is always > > zero. Delete the check for non-zero. > >
Yep! The code use to be:
if (ep->tp.args[i].code->op == FETCH_OP_TP_ARG) { ret = trace_eprobe_tp_arg_update(ep, i); if (ret) trace_probe_log_err(0, BAD_ATTACH_ARG); }
/* Handle symbols "@" */ if (!ret) ret = traceprobe_update_arg(&ep->tp.args[i]);
return ret; }
and is now:
ret = traceprobe_parse_probe_arg(&ep->tp, i, argv[i], &ctx); if (ret) return ret;
/* Handle symbols "@" */ if (!ret) ret = traceprobe_update_arg(&ep->tp.args[i]);
return ret; }
so that last ret check is redundant.
> > Good catch! > > Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
> > > Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> > > --- > > This code was changed in 1b8b0cd754cd (tracing/probes: Move event > > parameter fetching code to common parser) > > OK, this will be picked to the 6.5 fix.
Thanks Masami and Dan,
-- Steve
> > Thank you! > > > > > kernel/trace/trace_eprobe.c | 5 +---- > > 1 file changed, 1 insertion(+), 4 deletions(-) > > > > diff --git a/kernel/trace/trace_eprobe.c b/kernel/trace/trace_eprobe.c > > index cb0077ba2b49..b5181d690b4d 100644 > > --- a/kernel/trace/trace_eprobe.c > > +++ b/kernel/trace/trace_eprobe.c > > @@ -797,10 +797,7 @@ static int trace_eprobe_tp_update_arg(struct trace_eprobe *ep, const char *argv[ > > return ret; > > > > /* Handle symbols "@" */ > > - if (!ret) > > - ret = traceprobe_update_arg(&ep->tp.args[i]); > > - > > - return ret; > > + return traceprobe_update_arg(&ep->tp.args[i]); > > } > > > > static int trace_eprobe_parse_filter(struct trace_eprobe *ep, int argc, const char *argv[]) > > -- > > 2.39.2 > > > >
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