This is used by the igb driver.
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
backport/backport-include/linux/skbuff.h | 57 ++++++++++++++++++++++++++++++++
1 file changed, 57 insertions(+)
diff --git a/backport/backport-include/linux/skbuff.h b/backport/backport-include/linux/skbuff.h
index e74ef0b..df0eb62 100644
--- a/backport/backport-include/linux/skbuff.h
+++ b/backport/backport-include/linux/skbuff.h
@@ -199,4 +199,61 @@ static inline struct sk_buff *__pskb_copy_fclone(struct sk_buff *skb,
struct sk_buff *skb_clone_sk(struct sk_buff *skb);
#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0)
+/**
+ * __dev_alloc_pages - allocate page for network Rx
+ * @gfp_mask: allocation priority. Set __GFP_NOMEMALLOC if not for network Rx
+ * @order: size of the allocation
+ *
+ * Allocate a new page.
+ *
+ * %NULL is returned if there is no free memory.
+*/
+#define __dev_alloc_pages LINUX_BACKPORT(__dev_alloc_pages)
+static inline struct page *__dev_alloc_pages(gfp_t gfp_mask,
+ unsigned int order)
+{
+ /* This piece of code contains several assumptions.
+ * 1. This is for device Rx, therefor a cold page is preferred.
+ * 2. The expectation is the user wants a compound page.
+ * 3. If requesting a order 0 page it will not be compound
+ * due to the check to see if order has a value in prep_new_page
+ * 4. __GFP_MEMALLOC is ignored if __GFP_NOMEMALLOC is set due to
+ * code in gfp_to_alloc_flags that should be enforcing this.
+ */
+ gfp_mask |= __GFP_COLD | __GFP_COMP;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,6,0)
+ gfp_mask |= __GFP_MEMALLOC;
+#endif
+
+ return alloc_pages_node(NUMA_NO_NODE, gfp_mask, order);
+}
+
+#define dev_alloc_pages LINUX_BACKPORT(dev_alloc_pages)
+static inline struct page *dev_alloc_pages(unsigned int order)
+{
+ return __dev_alloc_pages(GFP_ATOMIC, order);
+}
+
+/**
+ * __dev_alloc_page - allocate a page for network Rx
+ * @gfp_mask: allocation priority. Set __GFP_NOMEMALLOC if not for network Rx
+ *
+ * Allocate a new page.
+ *
+ * %NULL is returned if there is no free memory.
+ */
+#define __dev_alloc_page LINUX_BACKPORT(__dev_alloc_page)
+static inline struct page *__dev_alloc_page(gfp_t gfp_mask)
+{
+ return __dev_alloc_pages(gfp_mask, 0);
+}
+
+#define dev_alloc_page LINUX_BACKPORT(dev_alloc_page)
+static inline struct page *dev_alloc_page(void)
+{
+ return __dev_alloc_page(GFP_ATOMIC);
+}
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0) */
+
#endif /* __BACKPORT_SKBUFF_H */
--
1.9.1
--
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