X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=include%2Fasm-powerpc%2Fdma-mapping.h;h=74c549780987ba8e9feb48a299c9455c32cfce93;hb=3d63430a26b91fe3daee0dd933f899c225e66daa;hp=de1395023cb169702979aeb31ad0aea30e760dc2;hpb=3affedc4e1ce837033b6c5e9289d2ce2f5a62d31;p=linux-2.6-omap-h63xx.git

diff --git a/include/asm-powerpc/dma-mapping.h b/include/asm-powerpc/dma-mapping.h
index de1395023cb..74c54978098 100644
--- a/include/asm-powerpc/dma-mapping.h
+++ b/include/asm-powerpc/dma-mapping.h
@@ -45,6 +45,15 @@ extern void __dma_sync_page(struct page *page, unsigned long offset,
 #endif /* ! CONFIG_NOT_COHERENT_CACHE */
 
 #ifdef CONFIG_PPC64
+
+static inline unsigned long device_to_mask(struct device *dev)
+{
+	if (dev->dma_mask && *dev->dma_mask)
+		return *dev->dma_mask;
+	/* Assume devices without mask can take 32 bit addresses */
+	return 0xfffffffful;
+}
+
 /*
  * DMA operations are abstracted for G5 vs. i/pSeries, PCI vs. VIO
  */