linux-kernel - Re: [RFC PATCH 1/5] livepatch: ftrace: arm64: Add support for DYNAMIC_FTRACE_WITH

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Message-ID: <1432883689.3551.3.camel@x220>
Date:	Fri, 29 May 2015 09:14:49 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Li Bin <huawei.libin@...wei.com>
Cc:	rostedt@...dmis.org, mingo@...nel.org, jpoimboe@...hat.com,
	sjenning@...hat.com, jkosina@...e.cz, vojtech@...e.cz,
	catalin.marinas@....com, will.deacon@....com,
	masami.hiramatsu.pt@...achi.com, live-patching@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	lizefan@...wei.com, felix.yang@...wei.com, guohanjun@...wei.com,
	xiexiuqi@...wei.com
Subject: Re: [RFC PATCH 1/5] livepatch: ftrace: arm64: Add support for
 DYNAMIC_FTRACE_WITH_REGS

On Thu, 2015-05-28 at 13:51 +0800, Li Bin wrote:
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig

>  	select HAVE_DYNAMIC_FTRACE
> +	select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE

What's the point of "if HAVE_DYNAMIC_FTRACE" here? That test should
always evaluate to true, because HAVE_DYNAMIC_FTRACE is also selected.


Paul Bolle



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