linux-kernel - Re: [PATCH 06/17] x86, mpx: trace attempts to find bounds tables

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Message-ID: <20150330212936.GK3042@home.goodmis.org>
Date:	Mon, 30 Mar 2015 17:29:36 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Dave Hansen <dave@...1.net>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org, tglx@...utronix.de,
	dave.hansen@...ux.intel.com
Subject: Re: [PATCH 06/17] x86, mpx: trace attempts to find bounds tables

On Fri, Mar 27, 2015 at 02:53:03PM -0700, Dave Hansen wrote:
>  b/arch/x86/include/asm/trace/mpx.h |   22 ++++++++++++++++++++++
>  b/arch/x86/mm/mpx.c                |    1 +
>  2 files changed, 23 insertions(+)
> 
> diff -puN arch/x86/include/asm/trace/mpx.h~mpx-trace_unmap_search arch/x86/include/asm/trace/mpx.h
> --- a/arch/x86/include/asm/trace/mpx.h~mpx-trace_unmap_search	2015-03-27 14:35:05.987816914 -0700
> +++ b/arch/x86/include/asm/trace/mpx.h	2015-03-27 14:35:05.992817139 -0700
> @@ -75,6 +75,28 @@ TRACE_EVENT(mpx_unmap_zap,
>  	)
>  );
>  
> +TRACE_EVENT(mpx_unmap_search,
> +
> +	TP_PROTO(unsigned long start,
> +		 unsigned long end),
> +	TP_ARGS(start, end),
> +
> +	TP_STRUCT__entry(
> +		__field(unsigned long, start)
> +		__field(unsigned long, end)
> +	),
> +
> +	TP_fast_assign(
> +		__entry->start = start;
> +		__entry->end   = end;
> +	),
> +
> +	TP_printk("[0x%p:0x%p]",
> +		(void *)__entry->start,
> +		(void *)__entry->end
> +	)
> +);

This event is exactly the same as the previous event. Can you use

DECLARE_EVENT_CLASS() and DEFINE_EVENT() instead?

-- Steve

> +
>  #else
>  
>  /*
> diff -puN arch/x86/mm/mpx.c~mpx-trace_unmap_search arch/x86/mm/mpx.c
--
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