linux-kernel - [Patch RFC 2/2] tracing: gpio: add Kconfig option for enabling/disabling trace events

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Message-Id: <1434229212-3168-3-git-send-email-tal.shorer@gmail.com>
Date:	Sun, 14 Jun 2015 00:00:12 +0300
From:	Tal Shorer <tal.shorer@...il.com>
To:	rostedt@...dmis.org, mingo@...hat.com
Cc:	linux-kernel@...r.kernel.org, Tal Shorer <tal.shorer@...il.com>
Subject: [Patch RFC 2/2] tracing: gpio: add Kconfig option for enabling/disabling trace events

Add a new options to gpio Kconfig, CONFIG_GPIO_TRACING, that is used
for enabling/disabling compilation of gpio function trace events.

Signed-off-by: Tal Shorer <tal.shorer@...il.com>
---
 drivers/gpio/Kconfig        | 6 ++++++
 include/trace/events/gpio.h | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index caefe80..1480a22 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -88,6 +88,12 @@ config GPIO_SYSFS
 config GPIO_GENERIC
 	tristate
 
+config GPIO_TRACING
+	bool "gpio tracing"
+	depends on TRACING
+	help
+	  Enable tracing for gpio subsystem
+
 # put drivers in the right section, in alphabetical order
 
 # This symbol is selected by both I2C and SPI expanders
diff --git a/include/trace/events/gpio.h b/include/trace/events/gpio.h
index 927a8ad..09af636 100644
--- a/include/trace/events/gpio.h
+++ b/include/trace/events/gpio.h
@@ -1,6 +1,10 @@
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM gpio
 
+#ifndef CONFIG_GPIO_TRACING
+#define NOTRACE
+#endif
+
 #if !defined(_TRACE_GPIO_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_GPIO_H
 
-- 
2.2.2

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