linux-kernel - Re: [PATCH 1/2] tracing/kprobes: make Kconfig dependencies generic

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Message-ID: <4B734B37.4000903@redhat.com>
Date:	Wed, 10 Feb 2010 19:11:35 -0500
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
CC:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] tracing/kprobes: make Kconfig dependencies generic

Heiko Carstens wrote:
> From: Heiko Carstens <heiko.carstens@...ibm.com>
> 
> KPROBES_EVENT actually depends on the regs and stack access API (b1cf540f)
> and not on x86.
> So introduce a new config option which architectures can select if they
> have the API implemented and switch x86.

Looks good to me:) Thanks!

Acked-by: Masami Hiramatsu <mhiramat@...hat.com>

> 
> Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
> ---
>  arch/Kconfig         |    3 +++
>  arch/x86/Kconfig     |    1 +
>  kernel/trace/Kconfig |    2 +-
>  3 files changed, 5 insertions(+), 1 deletion(-)
> 
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -121,6 +121,9 @@ config HAVE_DMA_ATTRS
>  config USE_GENERIC_SMP_HELPERS
>  	bool
>  
> +config HAVE_REGS_AND_STACK_ACCESS_API
> +	bool
> +
>  config HAVE_CLK
>  	bool
>  	help
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -45,6 +45,7 @@ config X86
>  	select HAVE_GENERIC_DMA_COHERENT if X86_32
>  	select HAVE_EFFICIENT_UNALIGNED_ACCESS
>  	select USER_STACKTRACE_SUPPORT
> +	select HAVE_REGS_AND_STACK_ACCESS_API
>  	select HAVE_DMA_API_DEBUG
>  	select HAVE_KERNEL_GZIP
>  	select HAVE_KERNEL_BZIP2
> --- a/kernel/trace/Kconfig
> +++ b/kernel/trace/Kconfig
> @@ -449,7 +449,7 @@ config BLK_DEV_IO_TRACE
>  
>  config KPROBE_EVENT
>  	depends on KPROBES
> -	depends on X86
> +	depends on HAVE_REGS_AND_STACK_ACCESS_API
>  	bool "Enable kprobes-based dynamic events"
>  	select TRACING
>  	default y
> --
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-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com

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