linux-kernel - [PATCH -next,-tip ] kprobes: Fix Kconfig dependency

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Message-ID: <20100913102541.20260.85700.stgit@ltc236.sdl.hitachi.co.jp>
Date:	Mon, 13 Sep 2010 19:25:41 +0900
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	linux-kernel@...r.kernel.org, 2nddept-manager@....hitachi.co.jp,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Felipe Contreras <felipe.contreras@...il.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	linux-kernel@...r.kernel.org, linux-next@...r.kernel.org,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	akpm <akpm@...ux-foundation.org>
Subject: [PATCH -next,-tip ] kprobes: Fix Kconfig dependency

Fix Kconfig dependency among Kprobes, optprobe and kallsyms.

Kprobes uses kallsyms_lookup for finding target function and checking
instruction boundary, thus CONFIG_KPROBES should select CONFIG_KALLSYMS.

Optprobe is an optional feature which is supported on x86 arch, and
it also uses kallsyms_lookup for checking instructions in the target
function. Since KALLSYMS_ALL just adds symbols of kernel variables,
it doesn't need to select KALLSYMS_ALL.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Felipe Contreras <felipe.contreras@...il.com>
Cc: Randy Dunlap <randy.dunlap@...cle.com>,
Cc: linux-kernel@...r.kernel.org,
Cc: linux-next@...r.kernel.org,
Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>,
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
Cc: "David S. Miller" <davem@...emloft.net>,
Cc: akpm <akpm@...ux-foundation.org>
---

 arch/Kconfig |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index 4877a8c..fe48fc7 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -32,8 +32,9 @@ config HAVE_OPROFILE
 
 config KPROBES
 	bool "Kprobes"
-	depends on KALLSYMS && MODULES
+	depends on MODULES
 	depends on HAVE_KPROBES
+	select KALLSYMS
 	help
 	  Kprobes allows you to trap at almost any kernel address and
 	  execute a callback function.  register_kprobe() establishes
@@ -45,7 +46,6 @@ config OPTPROBES
 	def_bool y
 	depends on KPROBES && HAVE_OPTPROBES
 	depends on !PREEMPT
-	select KALLSYMS_ALL
 
 config HAVE_EFFICIENT_UNALIGNED_ACCESS
 	bool

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