[PATCH 2/2] backports: xfrm: Add skb_ext_reset()

skb_ext_reset() was added in upstream commit 174e23810cd3 ("sk_buff:
drop all skb extensions on free and skb scrubbing") and is now used by
mac80211_hwsim.

skb_ext_reset() replaced the old call to secpath_reset() in
mac80211_hwsim and other places and it also does similar things than
this function. Juts call the old secpath_reset() on older kernel
versions.

This was added to net/xfrm.h and not linux/skbuff.h because
secpath_reset() is only available in net/xfrm.h in the upstream kernel
and this is not included in linux/skbuff.h.

Signed-off-by: Hauke Mehrtens <[email protected]>
---
 backport/backport-include/net/xfrm.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 backport/backport-include/net/xfrm.h

diff --git a/backport/backport-include/net/xfrm.h b/backport/backport-include/net/xfrm.h
new file mode 100644
index 00000000..7e55984b
--- /dev/null
+++ b/backport/backport-include/net/xfrm.h
@@ -0,0 +1,14 @@
+#ifndef __BACKPORT_NET_XFRM_H
+#define __BACKPORT_NET_XFRM_H
+#include_next <net/xfrm.h>
+#include <linux/version.h>
+
+#if LINUX_VERSION_IS_LESS(5,4,0)
+#define skb_ext_reset LINUX_BACKPORT(skb_ext_reset)
+static inline void skb_ext_reset(struct sk_buff *skb)
+{
+	secpath_reset(skb);
+}
+#endif
+
+#endif /* __BACKPORT_NET_XFRM_H */
-- 
2.20.1

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