linux-kernel - Re: [PATCH 4/6] trace: Make UPROBES depend on PERF

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Date:	Fri, 4 Oct 2013 20:52:53 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, peterz@...radead.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 4/6] trace: Make UPROBES depend on PERF_EVENTS

On Fri,  4 Oct 2013 14:39:46 -0700
Andi Kleen <andi@...stfloor.org> wrote:

> From: Andi Kleen <ak@...ux.intel.com>
> 
> UPROBES need the perf events code, so add a dependency
> from PERF_EVENTS to UPROBES.

Can you please be a bit more specific on what uprobes requires of perf?
That is, what part of the perf events code is needed, and why?

-- Steve

> 
> Cc: rostedt@...dmis.org
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  kernel/trace/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
> index 015f85a..8639819 100644
> --- a/kernel/trace/Kconfig
> +++ b/kernel/trace/Kconfig
> @@ -424,6 +424,7 @@ config UPROBE_EVENT
>  	bool "Enable uprobes-based dynamic events"
>  	depends on ARCH_SUPPORTS_UPROBES
>  	depends on MMU
> +	depends on PERF_EVENTS
>  	select UPROBES
>  	select PROBE_EVENTS
>  	select TRACING

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