1 files changed, 28 insertions, 0 deletions

diff --git a/include/asm-ia64/scatterlist.h b/include/asm-ia64/scatterlist.h
new file mode 100644
index 000000000000..834a189ef189
--- /dev/null
+++ b/include/asm-ia64/scatterlist.h
@@ -0,0 +1,28 @@
+#ifndef _ASM_IA64_SCATTERLIST_H
+#define _ASM_IA64_SCATTERLIST_H
+
+/*
+ * Modified 1998-1999, 2001-2002, 2004
+ *      David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
+ */
+
+struct scatterlist {
+        struct page *page;
+        unsigned int offset;
+        unsigned int length;    /* buffer length */
+
+        dma_addr_t dma_address;
+        unsigned int dma_length;
+};
+
+/*
+ * It used to be that ISA_DMA_THRESHOLD had something to do with the
+ * DMA-limits of ISA-devices.  Nowadays, its only remaining use (apart
+ * from the aha1542.c driver, which isn't 64-bit clean anyhow) is to
+ * tell the block-layer (via BLK_BOUNCE_ISA) what the max. physical
+ * address of a page is that is allocated with GFP_DMA.  On IA-64,
+ * that's 4GB - 1.
+ */
+#define ISA_DMA_THRESHOLD       0xffffffff
+
+#endif /* _ASM_IA64_SCATTERLIST_H */