+
+/*
+ * vlan_tx_tag_* macros renamed to skb_vlan_tag_* (Linux commit: df8a39defad4)
+ * For older kernels backported this commit, need to use renamed functions.
+ * This fix is specific to RedHat/CentOS kernels.
+ */
+#if (defined(RHEL_RELEASE_CODE) && \
+ (RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(6, 8)) && \
+ (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 34)))
+#define vlan_tx_tag_get skb_vlan_tag_get
+#define vlan_tx_tag_present skb_vlan_tag_present
+#endif
+
+#if ( LINUX_VERSION_CODE >= KERNEL_VERSION(4,9,0) )
+#define HAVE_VF_VLAN_PROTO
+#endif /* >= 4.9.0 */
+
+#if (defined(RHEL_RELEASE_CODE) && \
+ (RHEL_RELEASE_VERSION(7, 5) <= RHEL_RELEASE_CODE))
+#define ndo_change_mtu ndo_change_mtu_rh74
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
+#define HAVE_PCI_ENABLE_MSIX
+#endif
+
+#if defined(timer_setup) && defined(from_timer)
+#define HAVE_TIMER_SETUP
+#endif
+