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
@@ -1672,4 +1672,13 @@
 	    PCIM_CMD_BUSMASTEREN) != 0);
 }
 
+static inline int
+pci_wait_for_pending_transaction(struct pci_dev *pdev)
+{
+
+	return (0);
+}
+
+bool pci_device_is_present(struct pci_dev *pdev);
+
 #endif	/* _LINUXKPI_LINUX_PCI_H_ */
diff --git a/sys/compat/linuxkpi/common/src/linux_pci.c b/sys/compat/linuxkpi/common/src/linux_pci.c
--- a/sys/compat/linuxkpi/common/src/linux_pci.c
+++ b/sys/compat/linuxkpi/common/src/linux_pci.c
@@ -996,6 +996,16 @@
 	return (desc);
 }
 
+bool
+pci_device_is_present(struct pci_dev *pdev)
+{
+	device_t dev;
+
+	dev = pdev->dev.bsddev;
+
+	return (bus_child_present(dev));
+}
+
 CTASSERT(sizeof(dma_addr_t) <= sizeof(uint64_t));
 
 struct linux_dma_obj {