linux-kernel - Re: [PATCH][linux-next] coda: Do not define TRACE_SYSTEM

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Date:	Thu, 14 May 2015 22:58:57 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Philipp Zabel <p.zabel@...gutronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Kamil Debski <k.debski@...sung.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Chris Wilson <chris@...is-wilson.co.uk>
Subject: Re: [PATCH][linux-next] coda: Do not define TRACE_SYSTEM_STRING

On Thu, 14 May 2015 22:52:50 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> TRACE_SYSTEM_STRING is used internally to the TRACE_EVENT system. It
> should not be defined by tracepoint files. I'm not even sure who
> started that (I hope it wasn't me!)

According to git history, that define first showed up in

commit 1c5d22f76dc721f3acb7a3dadc657a221e487fb7
Author: Chris Wilson <chris@...is-wilson.co.uk>
Date:   Tue Aug 25 11:15:50 2009 +0100

    drm/i915: Add tracepoints

And it must have spread with cut and paste. Now I need to start
administering a vaccine to keep developers from catching it!

-- Steve


> 
> Reported-by: kbuild test robot <fengguang.wu@...el.com>
> Signed-off-by: Steven Rostedt <rostedt@...dmis.org.
> ---
> diff --git a/drivers/media/platform/coda/trace.h b/drivers/media/platform/coda/trace.h
> index d1d06cbd1f6a..781bf7286d53 100644
> --- a/drivers/media/platform/coda/trace.h
> +++ b/drivers/media/platform/coda/trace.h
> @@ -9,8 +9,6 @@
>  
>  #include "coda.h"
>  
> -#define TRACE_SYSTEM_STRING __stringify(TRACE_SYSTEM)
> -
>  TRACE_EVENT(coda_bit_run,
>  	TP_PROTO(struct coda_ctx *ctx, int cmd),
>  

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