linux-kernel - [PATCH 2/2 V2] Kprobes: Build kretprobe examples only if arch supports kretprobes

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Message-ID: <20071211062402.GB10166@in.ibm.com>
Date:	Tue, 11 Dec 2007 11:54:02 +0530
From:	Ananth N Mavinakayanahalli <ananth@...ibm.com>
To:	akpm@...ux-foundation.org
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	davem@...emloft.net, mathieu.desnoyers@...ymtl.ca,
	hskinnemoen@...el.com, sam@...nborg.org
Subject: [PATCH 2/2 V2] Kprobes: Build kretprobe examples only if arch supports kretprobes

From: Ananth N Mavinakayanahalli <ananth@...ibm.com>

This patch builds samples/kprobes/kretprobe_example.c only on archs that
support kretprobes. Thanks to Sam Ravnborg for Kconfig suggestions.

V2: Updated dependency on CONFIG_KRETPROBES

Signed-off-by: Ananth N Mavinakayanahalli <ananth@...ibm.com>
---
 samples/Kconfig          |    5 +++++
 samples/kprobes/Makefile |    4 ++--
 2 files changed, 7 insertions(+), 2 deletions(-)

Index: linux-2.6.24-rc4/samples/kprobes/Makefile
===================================================================
--- linux-2.6.24-rc4.orig/samples/kprobes/Makefile
+++ linux-2.6.24-rc4/samples/kprobes/Makefile
@@ -1,5 +1,5 @@
 # builds the kprobes example kernel modules;
 # then to use one (as root):  insmod <module_name.ko>
 
-obj-$(CONFIG_SAMPLE_KPROBES) += kprobe_example.o jprobe_example.o \
-		kretprobe_example.o
+obj-$(CONFIG_SAMPLE_KPROBES) += kprobe_example.o jprobe_example.o
+obj-$(CONFIG_SAMPLE_KRETPROBES) += kretprobe_example.o
Index: linux-2.6.24-rc4/samples/Kconfig
===================================================================
--- linux-2.6.24-rc4.orig/samples/Kconfig
+++ linux-2.6.24-rc4/samples/Kconfig
@@ -28,5 +28,10 @@ config SAMPLE_KPROBES
 	help
 	  This build several kprobes example modules.
 
+config SAMPLE_KRETPROBES
+	tristate "Build kretprobes example -- loadable modules only"
+	default m
+	depends on SAMPLE_KPROBES && KRETPROBES
+
 endif # SAMPLES
 
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