linux-kernel - Re: [PATCH 1/2] Kprobes: Indicate kretprobe support in arch/<arch>/Kconfig

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Date:	Mon, 10 Dec 2007 11:13:07 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc:	akpm@...ux-foundation.org, lkml <linux-kernel@...r.kernel.org>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	davem@...emloft.net, mathieu.desnoyers@...ymtl.ca,
	hskinnemoen@...el.com
Subject: Re: [PATCH 1/2] Kprobes: Indicate kretprobe support in arch/<arch>/Kconfig

On Mon, Dec 10, 2007 at 03:22:22PM +0530, Ananth N Mavinakayanahalli wrote:
> From: Ananth N Mavinakayanahalli <ananth@...ibm.com>
> 
> This patch adds CONFIG_HAVE_KRETPROBES to the arch/<arch>/Kconfig file
> for relevant architectures with kprobes support. This facilitates easy
> handling of in-kernel modules (like samples/kprobes/kretprobe_example.c)
> that depend on kretprobes being present in the kernel.
> 
> This patch depends on Mathieu Desnoyers' "Instrumentation menu removal"
> patchset (http://marc.info/?l=linux-kernel&m=119496432229633&w=2)
> 
> Updated to apply on 2.6.24-rc4-mm1.
> 
> Signed-off-by: Ananth N Mavinakayanahalli <ananth@...ibm.com>
> ---
>  arch/avr32/Kconfig            |    5 +++++
>  arch/ia64/Kconfig             |    5 +++++
>  arch/powerpc/Kconfig          |    5 +++++
>  arch/s390/Kconfig             |    5 +++++
>  arch/sparc64/Kconfig          |    5 +++++
>  arch/x86/Kconfig              |    5 +++++
>  include/asm-ia64/kprobes.h    |    1 -
>  include/asm-powerpc/kprobes.h |    1 -
>  include/asm-s390/kprobes.h    |    1 -
>  include/asm-x86/kprobes_32.h  |    1 -
>  include/asm-x86/kprobes_64.h  |    1 -
>  include/linux/kprobes.h       |    6 +++---
>  kernel/kprobes.c              |    8 +++-----
>  13 files changed, 36 insertions(+), 13 deletions(-)
> 
> Index: linux-2.6.24-rc4/arch/avr32/Kconfig
> ===================================================================
> --- linux-2.6.24-rc4.orig/arch/avr32/Kconfig
> +++ linux-2.6.24-rc4/arch/avr32/Kconfig
> @@ -66,6 +66,11 @@ config GENERIC_BUG
>  	def_bool y
>  	depends on BUG
>  
> +config HAVE_KRETPROBES
> +	bool
> +	depends on HAVE_KPROBES
> +	default n
> +

The symbol HAVE_KRETPROBES should be defined in the common file - so
the only thing you have to do is a single line:
 config AVR32
+	select HAVE_KRETPROBES


Much more dense than defining the symbols once for each arch.

	Sam
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