net: Add SKB DMA mapping helper functions.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 4b2be23903c4..aa80ad9cbc88 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -359,6 +359,14 @@ struct sk_buff {
 
 #include <asm/system.h>
 
+#ifdef CONFIG_HAS_DMA
+#include <linux/dma-mapping.h>
+extern int skb_dma_map(struct device *dev, struct sk_buff *skb,
+                       enum dma_data_direction dir);
+extern void skb_dma_unmap(struct device *dev, struct sk_buff *skb,
+                          enum dma_data_direction dir);
+#endif
+
 extern void kfree_skb(struct sk_buff *skb);
 extern void            __kfree_skb(struct sk_buff *skb);
 extern struct sk_buff *__alloc_skb(unsigned int size,