Current versions of the ice driver redifine skb_frag_off*() on older kernels
(< 5.4.0). Unfortunately, ubuntu1804 kernel builds, 4.15, include this change
hence gcc complains with:

   kcompat_impl.h:46:28: error: redefinition of ‘skb_frag_off’

This patch is meant to be used on a particular version of ubuntu to make sure
the driver can be built against the shipped kernel.

Details:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7240b60c98d6

---
 src/kcompat_impl.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/kcompat_impl.h b/src/kcompat_impl.h
index 10d268c..715ce2a 100644
--- a/src/kcompat_impl.h
+++ b/src/kcompat_impl.h
@@ -42,6 +42,7 @@ static inline void net_prefetch(void *p)
  * Implementing the wrappers directly for older kernels which still have the
  * old implementation of skb_frag_t is trivial.
  */
+#undef NEED_SKB_FRAG_OFF_ACCESSORS
 #ifdef NEED_SKB_FRAG_OFF_ACCESSORS
 static inline unsigned int skb_frag_off(const skb_frag_t *frag)
 {
--