linux-kernel - Re: [PATCH v11] bus: mhi: host: Add tracing support

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Date: Mon, 12 Feb 2024 13:08:48 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc: Krishna Chaitanya Chundru <quic_krichai@...cinc.com>, Manivannan
 Sadhasivam <mani@...nel.org>, Masami Hiramatsu <mhiramat@...nel.org>,
 linux-kernel@...r.kernel.org, mhi@...ts.linux.dev,
 linux-arm-msm@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
 quic_vbadigan@...cinc.com, quic_ramkri@...cinc.com,
 quic_nitegupt@...cinc.com, quic_skananth@...cinc.com,
 quic_parass@...cinc.com
Subject: Re: [PATCH v11] bus: mhi: host: Add tracing support

On Tue, 6 Feb 2024 15:01:10 +0530
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org> wrote:

> > Bot will check sparse warnings/errors mostly. But these checkpatch issues can be
> > fixed easily. If you don't do it now, then someone will send a patch for it
> > later.
> >   
> 
> Hmm, seems like we should ignore these checkpatch issues due to the way the
> macros are used by trace headers. Ignore my above comment, patch looks fine.

Yes please ignore checkpatch on any TRACE_EVENT() and related macros. It
doesn't understand them, and reports errors and asks for fixes that break
the default way of using TRACE_EVENT().

Someday I hope someone teaches checkpatch to know the TRACE_EVENT() default
format which is:

TRACE_EVENT(event,

	TP_PROTO(<proto>),

	TP_ARGS(<args>),

	TP_STRUCT__entry(
		__field(	<type>,		<field>			)
		__array(	<type>,		<field>,	<len>	)
	),

	TP_fast_assign(
		<code-block>
	),

	TP_printk("format", <print-args>)
);

But checkpatch will error all over the above. :-(

-- Steve