This appears to be the issue. DRM_UNLOCKED does not exist for nvidia-drm-drv.c to compile. Missing ot changed kernel header? # CC [M] /var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-gem-nvkms-memory.o cc -Wp,-MMD,/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/.nvidia-drm-gem-nvkms-memory.o.d -nostdinc -I./arch/x86/include -I./arch/x86/include/generated -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/compiler-version.h -include ./include/linux/kconfig.h -I./ubuntu/include -include ./include/linux/compiler_types.h -D__KERNEL__ -fmacro-prefix-map=./= -std=gnu11 -fshort-wchar -funsigned-char -fno-common -fno-PIE -fno-strict-aliasing -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -fcf-protection=none -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -mindirect-branch-cs-prefix -mfunction-return=thunk-extern -fno-jump-tables -mharden-sls=all -fpatchable-function-entry=16,16 -fno-delete-null-pointer-checks -O2 -fno-allow-store-data-races -fstack-protector-strong -fno-omit-frame-pointer -fno-optimize-sibling-calls -ftrivial-auto-var-init=zero -fno-stack-clash-protection -fzero-call-used-regs=used-gpr -pg -mrecord-mcount -mfentry -DCC_USING_FENTRY -falign-functions=16 -fstrict-flex-arrays=3 -fno-strict-overflow -fno-stack-check -fconserve-stack -Wall -Wundef -Werror=implicit-function-declaration -Werror=implicit-int -Werror=return-type -Werror=strict-prototypes -Wno-format-security -Wno-trigraphs -Wno-frame-address -Wno-address-of-packed-member -Wmissing-declarations -Wmissing-prototypes -Wframe-larger-than=1024 -Wno-main -Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-dangling-pointer -Wvla -Wno-pointer-sign -Wcast-function-type -Wno-stringop-overflow -Wno-array-bounds -Wno-alloc-size-larger-than -Wimplicit-fallthrough=5 -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -Wenum-conversion -Wno-unused-but-set-variable -Wno-unused-const-variable -Wno-restrict -Wno-packed-not-aligned -Wno-format-overflow -Wno-format-truncation -Wno-stringop-truncation -Wno-missing-field-initializers -Wno-type-limits -Wno-shift-negative-value -Wno-maybe-uninitialized -Wno-sign-compare -g -gdwarf-5 -I/var/lib/dkms/nvidia/545.29.06/build/common/inc -I/var/lib/dkms/nvidia/545.29.06/build -Wall -Wno-cast-qual -Wno-error -Wno-format-extra-args -D__KERNEL__ -DMODULE -DNVRM -DNV_VERSION_STRING=\"545.29.06\" -DNV_FILESYSTEM_ACCESS_AVAILABLE=1 -Wno-unused-function -Wuninitialized -fno-strict-aliasing -ffreestanding -mno-red-zone -mcmodel=kernel -DNV_UVM_ENABLE -Werror=undef -DNV_SPECTRE_V2=0 -DNV_KERNEL_INTERFACE_LAYER -I/var/lib/dkms/nvidia/545.29.06/build/nvidia-drm -UDEBUG -U_DEBUG -DNDEBUG -DNV_BUILD_MODULE_INSTANCES=0 -fsanitize=bounds-strict -fsanitize=shift -fsanitize=bool -fsanitize=enum -DMODULE -DKBUILD_BASENAME='"nvidia_drm_gem_nvkms_memory"' -DKBUILD_MODNAME='"nvidia_drm"' -D__KBUILD_MODNAME=kmod_nvidia_drm -c -o /var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-gem-nvkms-memory.o /var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-gem-nvkms-memory.c ; ./tools/objtool/objtool --hacks=jump_label --hacks=noinstr --hacks=skylake --retpoline --rethunk --sls --stackval --static-call --uaccess --prefix=16 --module /var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-gem-nvkms-memory.o In file included from /var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-drv.c:64: /var/lib/dkms/nvidia/545.29.06/build/nvidia-drm/nvidia-drm-drv.c:1489:40: error: ‘DRM_UNLOCKED’ undeclared here (not in a function); did you mean ‘VM_LOCKED’? 1489 | DRM_RENDER_ALLOW|DRM_UNLOCKED), | ^~~~~~~~~~~~ ./include/drm/drm_ioctl.h:155:26: note: in definition of macro ‘DRM_IOCTL_DEF_DRV’ 155 | .flags = _flags, \ | ^~~~~~