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diff --git a/kernel/nvidia-drm/nvidia-drm-drv.c b/kernel/nvidia-drm/nvidia-drm-drv.c
index 132d4d4..1291893 100644
--- a/kernel/nvidia-drm/nvidia-drm-drv.c
+++ b/kernel/nvidia-drm/nvidia-drm-drv.c
@@ -654,6 +654,13 @@ static const struct file_operations nv_drm_fops = {
.llseek = noop_llseek,
};
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 8, 0)
+// Rel. commit. "drm: Remove locking for legacy ioctls and DRM_UNLOCKED" (Thomas Zimmermann, 22 Nov 2023)
+// Mock this flag, which was already useless on any recent kernel, since it
+// only did something if the driver set DRIVER_LEGACY in driver_features.
+static const enum drm_ioctl_flags DRM_UNLOCKED = 0;
+#endif
+
static const struct drm_ioctl_desc nv_drm_ioctls[] = {
#if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE)
DRM_IOCTL_DEF_DRV(NVIDIA_GEM_IMPORT_NVKMS_MEMORY,
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