diff -Npur NVIDIA-Linux-x86-340.107.orig/kernel/nv-drm.c NVIDIA-Linux-x86-340.107/kernel/nv-drm.c
--- NVIDIA-Linux-x86-340.107.orig/kernel/nv-drm.c       2018-05-25 06:23:05.000000000 +0200
+++ NVIDIA-Linux-x86-340.107/kernel/nv-drm.c    2019-11-27 05:23:51.525088963 +0100
@@ -22,6 +22,10 @@
 #include <drm/drm_gem.h>
 #endif

+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0)
+#include <linux/version.h>
+#endif
+
 #if defined(NV_DRM_LEGACY_PCI_INIT_PRESENT)
 #define nv_drm_pci_init drm_legacy_pci_init
 #define nv_drm_pci_exit drm_legacy_pci_exit
@@ -161,6 +161,9 @@ static struct drm_driver nv_drm_driver =
 #else
     .driver_features = DRIVER_GEM | DRIVER_PRIME,
 #endif
+#if defined(DRIVER_LEGACY) || LINUX_VERSION_CODE >= KERNEL_VERSION(5, 4, 0)
+    .driver_features = DRIVER_GEM | DRIVER_LEGACY,
+#endif
     .load = nv_drm_load,
     .unload = nv_drm_unload,
     .fops = &nv_drm_fops,