linux-kernel - [PATCHv11a 2.6.36-rc2-tip 10/15] 10: tracing: config option to enable both kprobe-tracer and uprobe-tracer.

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Message-ID: <20100827141011.GD5444@linux.vnet.ibm.com>
Date:	Fri, 27 Aug 2010 19:40:11 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...e.hu>,
	Steven Rostedt <rostedt@...dmis.org>,
	Randy Dunlap <rdunlap@...otime.net>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Christoph Hellwig <hch@...radead.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Mark Wielaard <mjw@...hat.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Naren A Devaiah <naren.devaiah@...ibm.com>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	2nddept-manager@....hitachi.co.jp
Subject: [PATCHv11a 2.6.36-rc2-tip 10/15] 10: tracing: config option to
 enable both kprobe-tracer and uprobe-tracer.

Selecting CONFIG_PROBE_EVENTS enables both kprobe-based and
uprobes-based dynamic events. However kprobe-tracer or uprobe-tracer
can still be individually selected or disabled.

Signed-off-by: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Suggested-by: Frederic Weisbecker <fweisbec@...il.com>
---

Changelog from V10: Fixed few erroneous changes: missing s at eol.
	reported by Masami Hiramatsu.
 
 kernel/trace/Kconfig |   21 +++++++++++++++------
 1 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 55ba474..77e04b0 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -351,9 +351,8 @@ config BLK_DEV_IO_TRACE
 config KPROBE_EVENT
 	depends on KPROBES
 	depends on HAVE_REGS_AND_STACK_ACCESS_API
+	depends on PROBE_EVENTS
 	bool "Enable kprobes-based dynamic events"
-	select TRACING
-	select PROBE_EVENTS
 	default y
 	help
 	  This allows the user to add tracing events (similar to tracepoints)
@@ -370,10 +369,9 @@ config UPROBE_EVENT
 	bool "Enable uprobes-based dynamic events"
 	depends on ARCH_SUPPORTS_UPROBES
 	depends on MMU
+	depends on PROBE_EVENTS
 	select UPROBES
-	select PROBE_EVENTS
-	select TRACING
-	default n
+	default y
 	help
 	  This allows the user to add tracing events on top of userspace dynamic
 	  events (similar to tracepoints) on the fly via the traceevents interface.
@@ -383,7 +381,18 @@ config UPROBE_EVENT
 	  tools on user space applications.
 
 config PROBE_EVENTS
-	def_bool n
+	bool "Enable kprobes and uprobe based dynamic events"
+	select TRACING
+	default n
+	help
+	  This allows a user to add dynamic tracing events in
+	  kernel using kprobe-tracer and in userspace using
+	  uprobe-tracer. However users can still selectively
+	  disable one of these events.
+
+	  For more information on kprobe-tracer and uprobe-tracer
+	  please refer help under KPROBE_EVENT and UPROBE_EVENT
+	  respectively.
 
 config DYNAMIC_FTRACE
 	bool "enable/disable ftrace tracepoints dynamically"
--
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