linux-kernel - [PATCH 34/62] w1: move omap_hdq's probe function to .devinit.text

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Date:	Tue,  2 Mar 2010 15:28:33 -0800
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>,
	"Stanley.Miao" <stanley.miao@...driver.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Madhusudhan Chikkature <madhu.cr@...com>,
	Felipe Balbi <felipe.balbi@...ia.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 34/62] w1: move omap_hdq's probe function to .devinit.text

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

A pointer to omap_hdq_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: Stanley.Miao <stanley.miao@...driver.com>
Acked-by: Evgeniy Polyakov <zbr@...emap.net>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Madhusudhan Chikkature <madhu.cr@...com>
Cc: Felipe Balbi <felipe.balbi@...ia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/w1/masters/omap_hdq.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/w1/masters/omap_hdq.c b/drivers/w1/masters/omap_hdq.c
index 0d92969..22977d3 100644
--- a/drivers/w1/masters/omap_hdq.c
+++ b/drivers/w1/masters/omap_hdq.c
@@ -72,7 +72,7 @@ struct hdq_data {
 	int			init_trans;
 };
 
-static int __init omap_hdq_probe(struct platform_device *pdev);
+static int __devinit omap_hdq_probe(struct platform_device *pdev);
 static int omap_hdq_remove(struct platform_device *pdev);
 
 static struct platform_driver omap_hdq_driver = {
@@ -558,7 +558,7 @@ static void omap_w1_write_byte(void *_hdq, u8 byte)
 	return;
 }
 
-static int __init omap_hdq_probe(struct platform_device *pdev)
+static int __devinit omap_hdq_probe(struct platform_device *pdev)
 {
 	struct hdq_data *hdq_data;
 	struct resource *res;
-- 
1.7.0.1

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