[PATCH 05/11] backports: skbuf.h: Add skb_frag_off()

Add skb_frag_off() Which was added in upstream commit 7240b60c98d6
("linux: Add skb_frag_t page_offset accessors") which is used by the
usbnet driver.

Signed-off-by: Hauke Mehrtens <[email protected]>
---
 backport/backport-include/linux/skbuff.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/backport/backport-include/linux/skbuff.h b/backport/backport-include/linux/skbuff.h
index de943916..589d2499 100644
--- a/backport/backport-include/linux/skbuff.h
+++ b/backport/backport-include/linux/skbuff.h
@@ -380,4 +380,16 @@ static inline struct sk_buff *__skb_peek(const struct sk_buff_head *list_)
 }
 #endif
 
+#if LINUX_VERSION_IS_LESS(5,4,0)
+/**
+ * skb_frag_off() - Returns the offset of a skb fragment
+ * @frag: the paged fragment
+ */
+#define skb_frag_off LINUX_BACKPORT(skb_frag_off)
+static inline unsigned int skb_frag_off(const skb_frag_t *frag)
+{
+	return frag->page_offset;
+}
+#endif
+
 #endif /* __BACKPORT_SKBUFF_H */
-- 
2.20.1

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