diff --git a/sys/compat/linuxkpi/common/include/linux/pci.h b/sys/compat/linuxkpi/common/include/linux/pci.h
--- a/sys/compat/linuxkpi/common/include/linux/pci.h
+++ b/sys/compat/linuxkpi/common/include/linux/pci.h
@@ -1514,4 +1514,34 @@
 	pdev->want_iomap_res = true;
 }
 
+static inline bool
+pci_is_thunderbolt_attached(struct pci_dev *pdev)
+{
+
+	return (false);
+}
+
+static inline void *
+pci_platform_rom(struct pci_dev *pdev, size_t *size)
+{
+
+	return (NULL);
+}
+
+static inline void
+pci_ignore_hotplug(struct pci_dev *pdev)
+{
+}
+
+static inline int
+pcie_get_readrq(struct pci_dev *dev)
+{
+	u16 ctl;
+
+	if (pcie_capability_read_word(dev, PCI_EXP_DEVCTL, &ctl))
+		return (-EINVAL);
+
+	return (128 << ((ctl & PCI_EXP_DEVCTL_READRQ) >> 12));
+}
+
 #endif	/* _LINUXKPI_LINUX_PCI_H_ */