linux-kernel - [RFC PATCH] power_trace: move power

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Date:	Wed, 26 Jan 2011 17:19:39 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Ingo Molnar <mingo@...hat.com>
CC:	Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>, Yinghai Lu <yinghai@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: [RFC PATCH] power_trace: move power_trace to kernel/power/


I think kernel/trace/ is the place for the tracing implementation files,
it is not a good place for tracepoint creation. Any subsystem should
creates tracepoints at its owner location, see also all other CREATE_TRACE_POINTS.
For example: net-traces.c is in the net/core/ directory.

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
diff --git a/kernel/Makefile b/kernel/Makefile
index 353d3fe..25c3767 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -55,6 +55,7 @@ obj-$(CONFIG_MODULES) += module.o
 obj-$(CONFIG_KALLSYMS) += kallsyms.o
 obj-$(CONFIG_PM) += power/
 obj-$(CONFIG_FREEZER) += power/
+obj-$(CONFIG_TRACEPOINTS) += power/
 obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
 obj-$(CONFIG_KEXEC) += kexec.o
 obj-$(CONFIG_BACKTRACE_SELF_TEST) += backtracetest.o
@@ -100,7 +101,6 @@ obj-$(CONFIG_FUNCTION_TRACER) += trace/
 obj-$(CONFIG_TRACING) += trace/
 obj-$(CONFIG_X86_DS) += trace/
 obj-$(CONFIG_RING_BUFFER) += trace/
-obj-$(CONFIG_TRACEPOINTS) += trace/
 obj-$(CONFIG_SMP) += sched_cpupri.o
 obj-$(CONFIG_IRQ_WORK) += irq_work.o
 obj-$(CONFIG_PERF_EVENTS) += perf_event.o
diff --git a/kernel/power/Makefile b/kernel/power/Makefile
index c350e18..b5a74f5 100644
--- a/kernel/power/Makefile
+++ b/kernel/power/Makefile
@@ -9,3 +9,4 @@ obj-$(CONFIG_HIBERNATION)	+= hibernate.o snapshot.o swap.o user.o \
 				   block_io.o
 
 obj-$(CONFIG_MAGIC_SYSRQ)	+= poweroff.o
+obj-$(CONFIG_TRACEPOINTS)	+= power-traces.o
diff --git a/kernel/power/power-traces.c b/kernel/power/power-traces.c
new file mode 100644
index 0000000..f55fcf6
--- /dev/null
+++ b/kernel/power/power-traces.c
@@ -0,0 +1,20 @@
+/*
+ * Power trace points
+ *
+ * Copyright (C) 2009 Arjan van de Ven <arjan@...ux.intel.com>
+ */
+
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/power.h>
+
+#ifdef EVENT_POWER_TRACING_DEPRECATED
+EXPORT_TRACEPOINT_SYMBOL_GPL(power_start);
+#endif
+EXPORT_TRACEPOINT_SYMBOL_GPL(cpu_idle);
+
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index 761c510..8ad9849 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -52,7 +52,6 @@ obj-$(CONFIG_EVENT_TRACING) += trace_event_perf.o
 endif
 obj-$(CONFIG_EVENT_TRACING) += trace_events_filter.o
 obj-$(CONFIG_KPROBE_EVENT) += trace_kprobe.o
-obj-$(CONFIG_TRACEPOINTS) += power-traces.o
 ifeq ($(CONFIG_TRACING),y)
 obj-$(CONFIG_KGDB_KDB) += trace_kdb.o
 endif
diff --git a/kernel/trace/power-traces.c b/kernel/trace/power-traces.c
deleted file mode 100644
index f55fcf6..0000000
--- a/kernel/trace/power-traces.c
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * Power trace points
- *
- * Copyright (C) 2009 Arjan van de Ven <arjan@...ux.intel.com>
- */
-
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/workqueue.h>
-#include <linux/sched.h>
-#include <linux/module.h>
-
-#define CREATE_TRACE_POINTS
-#include <trace/events/power.h>
-
-#ifdef EVENT_POWER_TRACING_DEPRECATED
-EXPORT_TRACEPOINT_SYMBOL_GPL(power_start);
-#endif
-EXPORT_TRACEPOINT_SYMBOL_GPL(cpu_idle);
-
--
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