[PATCH] gcc4 fixes for sn2

[Jesse Barnes <jbarnes@engr.sgi.com>]

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This patch is needed since "warning: use of cast expressions as lvalues is 
deprecated" turned into an error in gcc4.  We can use the convenience macros 
for read access and explicit assignments for initialization.  I thought about 
using Alexandre's fixes, but this seemed a little simpler.

Signed-off-by: Jesse Barnes <jbarnes@sgi.com>

Thanks,
Jesse

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===== arch/ia64/sn/kernel/io_init.c 1.7 vs edited =====
--- 1.7/arch/ia64/sn/kernel/io_init.c	2005-01-07 21:44:03 -08:00
+++ edited/arch/ia64/sn/kernel/io_init.c	2005-01-10 13:50:14 -08:00
@@ -201,7 +201,7 @@
 	struct pci_dev *host_pci_dev;
 	int status = 0;
 
-	SN_PCIDEV_INFO(dev) = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
+	dev->sysdata = kmalloc(sizeof(struct pcidev_info), GFP_KERNEL);
 	if (SN_PCIDEV_INFO(dev) <= 0)
 		BUG();		/* Cannot afford to run out of memory */
 	memset(SN_PCIDEV_INFO(dev), 0, sizeof(struct pcidev_info));
@@ -309,8 +309,8 @@
 	 * after this point.
 	 */
 
-	PCI_CONTROLLER(bus) = controller;
-	SN_PCIBUS_BUSSOFT(bus) = provider_soft;
+	bus->sysdata = controller;
+	PCI_CONTROLLER(bus)->platform_data = provider_soft;
 
 	nasid = NASID_GET(SN_PCIBUS_BUSSOFT(bus)->bs_base);
 	cnode = nasid_to_cnodeid(nasid);