linux-kernel - [RFC PATCH v3 25/26] early kprobes: introduce kconfig option to support early kprobe on ftrace.

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Date:	Fri, 13 Feb 2015 13:41:17 +0800
From:	Wang Nan <wangnan0@...wei.com>
To:	<linux@....linux.org.uk>, <tglx@...utronix.de>, <mingo@...hat.com>,
	<hpa@...or.com>, <rostedt@...dmis.org>, <ananth@...ibm.com>,
	<anil.s.keshavamurthy@...el.com>, <davem@...emloft.net>,
	<masami.hiramatsu.pt@...achi.com>, <luto@...capital.net>,
	<keescook@...omium.org>, <oleg@...hat.com>, <wangnan0@...wei.com>,
	<dave.long@...aro.org>, <tixy@...aro.org>, <nico@...aro.org>,
	<yalin.wang2010@...il.com>, <catalin.marinas@....com>,
	<Yalin.Wang@...ymobile.com>, <mark.rutland@....com>,
	<dave.hansen@...ux.intel.com>, <jkenisto@...ibm.com>,
	<anton@...ba.org>, <stefani@...bold.net>, <JBeulich@...e.com>,
	<akpm@...ux-foundation.org>, <rusty@...tcorp.com.au>,
	<peterz@...radead.org>, <prarit@...hat.com>, <fabf@...net.be>,
	<hannes@...xchg.org>
CC:	<x86@...nel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <lizefan@...wei.com>
Subject: [RFC PATCH v3 25/26] early kprobes: introduce kconfig option to support early kprobe on ftrace.

On platform (like x86) which supports CONFIG_KPROBE_ON_FTRACE, makes
early kprobe depend on it so we are able to probe function entries.

Signed-off-by: Wang Nan <wangnan0@...wei.com>
---
 arch/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index 32e9f4a..79f809d 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -48,7 +48,7 @@ config KPROBES
 
 config EARLY_KPROBES
 	bool "Enable kprobes at very early booting stage"
-	depends on KPROBES && OPTPROBES
+	depends on KPROBES && OPTPROBES && (KPROBES_ON_FTRACE || !HAVE_KPROBES_ON_FTRACE)
 	def_bool y
 	help
 	  Enable kprobe at very early booting stage.
-- 
1.8.4

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