linux-kernel - [PATCH] emac: Fix dangerous struct assumption

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Message-ID: <20090408092716.392c3005@hyperion.delvare>
Date:	Wed, 8 Apr 2009 09:27:16 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Doug Thompson <dougthompson@...ssion.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] emac: Fix dangerous struct assumption

The emac-core driver includes code which assumes that the work_struct
which is included in every delayed_work is the first member of that
structure. This is currently the case but might change in the future,
so use to_delayed_work() instead, which doesn't make such an
assumption.

Signed-off-by: Jean Delvare <khali@...ux-fr.org>
Signed-off-by: Doug Thompson <dougthompson@...ssion.com>
---
 drivers/edac/edac_device.c |    2 +-
 drivers/edac/edac_mc.c     |    2 +-
 drivers/edac/edac_pci.c    |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

--- linux-2.6.30-rc0.orig/drivers/edac/edac_device.c	2009-03-24 13:43:33.000000000 +0100
+++ linux-2.6.30-rc0/drivers/edac/edac_device.c	2009-04-06 14:40:48.000000000 +0200
@@ -389,7 +389,7 @@ static void del_edac_device_from_global_
  */
 static void edac_device_workq_function(struct work_struct *work_req)
 {
-	struct delayed_work *d_work = (struct delayed_work *)work_req;
+	struct delayed_work *d_work = to_delayed_work(work_req);
 	struct edac_device_ctl_info *edac_dev = to_edac_device_ctl_work(d_work);
 
 	mutex_lock(&device_ctls_mutex);
--- linux-2.6.30-rc0.orig/drivers/edac/edac_mc.c	2009-03-24 13:43:33.000000000 +0100
+++ linux-2.6.30-rc0/drivers/edac/edac_mc.c	2009-04-06 14:40:14.000000000 +0200
@@ -260,7 +260,7 @@ static int edac_mc_assert_error_check_an
  */
 static void edac_mc_workq_function(struct work_struct *work_req)
 {
-	struct delayed_work *d_work = (struct delayed_work *)work_req;
+	struct delayed_work *d_work = to_delayed_work(work_req);
 	struct mem_ctl_info *mci = to_edac_mem_ctl_work(d_work);
 
 	mutex_lock(&mem_ctls_mutex);
--- linux-2.6.30-rc0.orig/drivers/edac/edac_pci.c	2009-04-06 11:17:57.000000000 +0200
+++ linux-2.6.30-rc0/drivers/edac/edac_pci.c	2009-04-06 14:40:04.000000000 +0200
@@ -233,7 +233,7 @@ EXPORT_SYMBOL_GPL(edac_pci_find);
  */
 static void edac_pci_workq_function(struct work_struct *work_req)
 {
-	struct delayed_work *d_work = (struct delayed_work *)work_req;
+	struct delayed_work *d_work = to_delayed_work(work_req);
 	struct edac_pci_ctl_info *pci = to_edac_pci_ctl_work(d_work);
 	int msec;
 	unsigned long delay;


-- 
Jean Delvare
--
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