linux-kernel - [tip:tracing/core] tracing/infrastructure: separate event tracer from event support

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Message-ID: <tip-5f77a88b3f8268b11940b51d2e03d26a663ceb90@git.kernel.org>
Date:	Mon, 13 Apr 2009 22:23:32 GMT
From:	tip-bot for Tom Zanussi <tzanussi@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	tzanussi@...il.com, rostedt@...dmis.org, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:tracing/core] tracing/infrastructure: separate event tracer from event support

Commit-ID:  5f77a88b3f8268b11940b51d2e03d26a663ceb90
Gitweb:     http://git.kernel.org/tip/5f77a88b3f8268b11940b51d2e03d26a663ceb90
Author:     Tom Zanussi <tzanussi@...il.com>
AuthorDate: Wed, 8 Apr 2009 03:14:01 -0500
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Tue, 14 Apr 2009 00:00:55 +0200

tracing/infrastructure: separate event tracer from event support

Add a new config option, CONFIG_EVENT_TRACING that gets selected
when CONFIG_TRACING is selected and adds everything needed by the stuff
in trace_export - basically all the event tracing support needed by e.g.
bprint, minus the actual events, which are only included if
CONFIG_EVENT_TRACER is selected.

So CONFIG_EVENT_TRACER can be used to turn on or off the generated events
(what I think of as the 'event tracer'), while CONFIG_EVENT_TRACING turns
on or off the base event tracing support used by both the event tracer and
the other things such as bprint that can't be configured out.

Signed-off-by: Tom Zanussi <tzanussi@...il.com>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: fweisbec@...il.com
LKML-Reference: <1239178441.10295.34.camel@...picana>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 include/asm-generic/vmlinux.lds.h |    2 +-
 kernel/trace/Kconfig              |    4 ++++
 kernel/trace/Makefile             |    6 +++---
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 7fa660f..7e9b1e9 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -61,7 +61,7 @@
 #define BRANCH_PROFILE()
 #endif
 
-#ifdef CONFIG_EVENT_TRACER
+#ifdef CONFIG_EVENT_TRACING
 #define FTRACE_EVENTS()	VMLINUX_SYMBOL(__start_ftrace_events) = .;	\
 			*(_ftrace_events)				\
 			VMLINUX_SYMBOL(__stop_ftrace_events) = .;
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 23b96eb..644606e 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -48,6 +48,9 @@ config FTRACE_NMI_ENTER
        depends on HAVE_FTRACE_NMI_ENTER
        default y
 
+config EVENT_TRACING
+	bool
+
 config TRACING
 	bool
 	select DEBUG_FS
@@ -56,6 +59,7 @@ config TRACING
 	select TRACEPOINTS
 	select NOP_TRACER
 	select BINARY_PRINTF
+	select EVENT_TRACING
 
 #
 # Minimum requirements an architecture has to meet for us to
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index 2630f51..3ad367e 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -40,11 +40,11 @@ obj-$(CONFIG_POWER_TRACER) += trace_power.o
 obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
 obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o
 obj-$(CONFIG_BLK_DEV_IO_TRACE)	+= blktrace.o
-obj-$(CONFIG_EVENT_TRACER) += trace_events.o
+obj-$(CONFIG_EVENT_TRACING) += trace_events.o
 obj-$(CONFIG_EVENT_TRACER) += events.o
-obj-$(CONFIG_EVENT_TRACER) += trace_export.o
+obj-$(CONFIG_EVENT_TRACING) += trace_export.o
 obj-$(CONFIG_FTRACE_SYSCALLS) += trace_syscalls.o
 obj-$(CONFIG_EVENT_PROFILE) += trace_event_profile.o
-obj-$(CONFIG_EVENT_TRACER) += trace_events_filter.o
+obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
 
 libftrace-y := ftrace.o
--
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