Allow arch-specific pci_dma_set_mask

Jeff,

Following is a patch that allows for architectures to override pci_set_dma_mask and friends for systems that need to do so such as the ARM IXP425. Instead of having invidual HAVE_ARCH_FOO for each of the three mask functions, I think it just makes more sense to have one for overrdding all three since chances are if you need to override one, you need to do so for all of them.

Tnx,
~Deepak

===== drivers/pci/pci.c 1.63 vs edited =====

@@ -658,6 +658,10 @@
 	}
 }
 
+#ifndef HAVE_ARCH_PCI_SET_DMA_MASK
+/*
+ * These can be overridden by arch-specific implementations
+ */
 int
 pci_set_dma_mask(struct pci_dev *dev, u64 mask)
 {

@@ -690,6 +694,7 @@
 
 	return 0;
 }
+#endif
      
 static int __devinit pci_init(void)
 {

Deepak Saxena - dsaxena at plexity dot net - http://www.plexity.net/

"Unlike me, many of you have accepted the situation of your imprisonment and   
 will die here like rotten cabbages." - Number 6