Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
include/linux/compat-3.2.h | 34 ++++++++++++++++++++++++++++++++++
1 files changed, 34 insertions(+), 0 deletions(-)
diff --git a/include/linux/compat-3.2.h b/include/linux/compat-3.2.h
index d10495c..009e341 100644
--- a/include/linux/compat-3.2.h
+++ b/include/linux/compat-3.2.h
@@ -5,6 +5,9 @@
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,2,0))
+#include <linux/skbuff.h>
+#include <linux/dma-mapping.h>
+
/*
* This is not part of The 2.6.37 kernel yet but we
* we use it to optimize the backport code we
@@ -24,6 +27,37 @@
#define PMSG_IS_AUTO(msg) (((msg).event & PM_EVENT_AUTO) != 0)
+/**
+ * skb_frag_page - retrieve the page refered to by a paged fragment
+ * @frag: the paged fragment
+ *
+ * Returns the &struct page associated with @frag.
+ */
+static inline struct page *skb_frag_page(const skb_frag_t *frag)
+{
+ return frag->page;
+}
+
+/**
+ * skb_frag_dma_map - maps a paged fragment via the DMA API
+ * @device: the device to map the fragment to
+ * @frag: the paged fragment to map
+ * @offset: the offset within the fragment (starting at the
+ * fragment's own offset)
+ * @size: the number of bytes to map
+ * @direction: the direction of the mapping (%PCI_DMA_*)
+ *
+ * Maps the page associated with @frag to @device.
+ */
+static inline dma_addr_t skb_frag_dma_map(struct device *dev,
+ const skb_frag_t *frag,
+ size_t offset, size_t size,
+ enum dma_data_direction dir)
+{
+ return dma_map_page(dev, skb_frag_page(frag),
+ frag->page_offset + offset, size, dir);
+}
+
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3,2,0)) */
#endif /* LINUX_3_2_COMPAT_H */
--
1.7.4.1
--
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