linux-kernel - [PATCH] ftrace: add have dynamic ftrace config for archs

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Date:	Sat, 17 May 2008 00:01:36 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Ingo Molnar <mingo@...e.hu>
cc:	David Miller <davem@...emloft.net>, sam@...nborg.org,
	acme@...hat.com, srostedt@...hat.com,
	LKML <linux-kernel@...r.kernel.org>, Pekka Paalanen <pq@....fi>,
	proski@....org, Soeren Sandmann Pedersen <sandmann@...hat.com>,
	a.p.zijlstra@...llo.nl, paulus@...ba.org,
	Sebastian Siewior <bigeasy@...utronix.de>
Subject: [PATCH] ftrace: add have dynamic ftrace config for archs


Now that ftrace is being ported to other architectures, it has become
apparent that DYNAMIC_FTRACE is dependent on whether or not that
architecture implements dynamic ftrace. FTRACE itself may be ported to
an architecture without porting dynamic ftrace.

This patch adds HAVE_DYNAMIC_FTRACE to allow architectures to port ftrace
without having to also port the dynamic aspect as well.

Signed-off-by: Steven Rostedt <srostedt@...hat.com>
---
 arch/powerpc/Kconfig |    1 +
 arch/sparc64/Kconfig |    1 +
 arch/x86/Kconfig     |    1 +
 kernel/trace/Kconfig |    4 ++++
 4 files changed, 7 insertions(+)

Index: linux-tip.git/arch/powerpc/Kconfig
===================================================================
--- linux-tip.git.orig/arch/powerpc/Kconfig	2008-05-16 20:26:20.000000000 -0700
+++ linux-tip.git/arch/powerpc/Kconfig	2008-05-16 20:27:47.000000000 -0700
@@ -107,6 +107,7 @@ config PPC
 	default y
 	select HAVE_IDE
 	select HAVE_IMMEDIATE
+	select HAVE_DYNAMIC_FTRACE
 	select HAVE_FTRACE
 	select HAVE_KPROBES
 	select HAVE_KRETPROBES
Index: linux-tip.git/arch/sparc64/Kconfig
===================================================================
--- linux-tip.git.orig/arch/sparc64/Kconfig	2008-05-16 20:26:20.000000000 -0700
+++ linux-tip.git/arch/sparc64/Kconfig	2008-05-16 20:27:24.000000000 -0700
@@ -11,6 +11,7 @@ config SPARC
 config SPARC64
 	bool
 	default y
+	select HAVE_DYNAMIC_FTRACE
 	select HAVE_FTRACE
 	select HAVE_IDE
 	select HAVE_LMB
Index: linux-tip.git/arch/x86/Kconfig
===================================================================
--- linux-tip.git.orig/arch/x86/Kconfig	2008-05-16 20:26:20.000000000 -0700
+++ linux-tip.git/arch/x86/Kconfig	2008-05-16 20:27:32.000000000 -0700
@@ -23,6 +23,7 @@ config X86
 	select HAVE_OPROFILE
 	select HAVE_KPROBES
 	select HAVE_KRETPROBES
+	select HAVE_DYNAMIC_FTRACE
 	select HAVE_FTRACE
 	select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64)
 	select HAVE_ARCH_KGDB if !X86_VOYAGER
Index: linux-tip.git/kernel/trace/Kconfig
===================================================================
--- linux-tip.git.orig/kernel/trace/Kconfig	2008-05-16 20:28:11.000000000 -0700
+++ linux-tip.git/kernel/trace/Kconfig	2008-05-16 20:35:07.000000000 -0700
@@ -4,6 +4,9 @@
 config HAVE_FTRACE
 	bool

+config HAVE_DYNAMIC_FTRACE
+	bool
+
 config TRACER_MAX_TRACE
 	bool

@@ -102,6 +105,7 @@ config CONTEXT_SWITCH_TRACER
 config DYNAMIC_FTRACE
 	bool "enable/disable ftrace tracepoints dynamically"
 	depends on FTRACE
+	depends on HAVE_DYNAMIC_FTRACE
 	default y
 	help
          This option will modify all the calls to ftrace dynamically


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