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

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Message-Id: <1238268358-6068-1-git-send-email-u.kleine-koenig@pengutronix.de>
Date:	Sat, 28 Mar 2009 20:25:58 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	linux-kernel@...r.kernel.org
Cc:	Ralf Baechle <ralf@...ux-mips.org>, Jeff Garzik <jeff@...zik.org>,
	"David S. Miller" <davem@...emloft.net>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Finn Thain <fthain@...egraphics.com.au>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] move jazzsonic's probe function to .devinit.text

A pointer to jazz_sonic_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.

As noticed by Geert Uytterhoeven sonic_probe1 is called by
jazz_sonic_probe, so the former has to move to .devinit.text, too.

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: Ralf Baechle <ralf@...ux-mips.org>
Cc: Jeff Garzik <jeff@...zik.org>
Cc: David S. Miller <davem@...emloft.net>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Finn Thain <fthain@...egraphics.com.au>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>
---
Hi Geert and Ralf,

thanks for your feed-back.

@Geert: Did you notice this, or your compiler?
@Ralf: I assume that I can still add your ack after this additional change?

Best regards
Uwe

 drivers/net/jazzsonic.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/jazzsonic.c b/drivers/net/jazzsonic.c
index 14248cf..ca68383 100644
--- a/drivers/net/jazzsonic.c
+++ b/drivers/net/jazzsonic.c
@@ -96,7 +96,7 @@ static int jazzsonic_close(struct net_device* dev)
 	return err;
 }
 
-static int __init sonic_probe1(struct net_device *dev)
+static int __devinit sonic_probe1(struct net_device *dev)
 {
 	static unsigned version_printed;
 	unsigned int silicon_revision;
@@ -204,7 +204,7 @@ out:
  * Probe for a SONIC ethernet controller on a Mips Jazz board.
  * Actually probing is superfluous but we're paranoid.
  */
-static int __init jazz_sonic_probe(struct platform_device *pdev)
+static int __devinit jazz_sonic_probe(struct platform_device *pdev)
 {
 	struct net_device *dev;
 	struct sonic_local *lp;
-- 
tg: (be0ea69..) t/platsection/jazz_sonic_driver (depends on: linus/master)
--
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