linux-kernel - [PATCH] move i2c_omap's probe function to .devinit.text

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Message-Id: <1247345591-22643-24-git-send-email-u.kleine-koenig@pengutronix.de>
Date:	Sat, 11 Jul 2009 22:52:52 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org
Cc:	Kalle Jokiniemi <ext-kalle.jokiniemi@...ia.com>,
	Tony Lindgren <tony@...mide.com>,
	Paul Walmsley <paul@...an.com>,
	Richard Woodruff <r-woodruff2@...com>,
	chandra shekhar <x0044955@...com>,
	Jason P Marini <jason.marini@...il.com>,
	Syed Mohammed Khasim <x0khasim@...com>,
	Jarkko Nikula <jarkko.nikula@...ia.com>,
	Juha Yrjola <juha.yrjola@...idboot.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] move i2c_omap's probe function to .devinit.text

A pointer to omap_i2c_probe is passed to the core via
platform_driver_register and so the function must not disappear when the
.init sections are discarded.  Otherwise (if also having HOTPLUG=y)
unbinding and binding a device to the driver via sysfs will result in an
oops as does a device being registered late.

An alternative to this patch is using platform_driver_probe instead of
platform_driver_register plus removing the pointer to the probe function
from the struct platform_driver.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc: Kalle Jokiniemi <ext-kalle.jokiniemi@...ia.com>
Cc: Tony Lindgren <tony@...mide.com>
Cc: Paul Walmsley <paul@...an.com>
Cc: Richard Woodruff <r-woodruff2@...com>
Cc: chandra shekhar <x0044955@...com>
Cc: Jason P Marini <jason.marini@...il.com>
Cc: Syed Mohammed Khasim  <x0khasim@...com>
Cc: Jarkko Nikula <jarkko.nikula@...ia.com>
Cc: Juha Yrjola <juha.yrjola@...idboot.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
---
 drivers/i2c/busses/i2c-omap.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index ad8d201..1ae5ae4 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -784,7 +784,7 @@ static const struct i2c_algorithm omap_i2c_algo = {
 	.functionality	= omap_i2c_func,
 };
 
-static int __init
+static int __devinit
 omap_i2c_probe(struct platform_device *pdev)
 {
 	struct omap_i2c_dev	*dev;
-- 
1.6.3.1

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