guest_uname: DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #0: Thu Jul  2 06:02:54 UTC 2026     root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64
kern.ident: X86_64_GENERIC
cc: 8.3 [DragonFly] Release/2019-02-22
drm: NOT in kernel (X86_64_GENERIC has 0 drm lines); built as module from /usr/src/sys/dev/drm/drm -> drm.ko (kldstat: 0x72000 bytes)
/dev/dri: absent (no GPU in QEMU; unprivileged ioctl entry not reachable on this guest)
loaded modules during run: drm.ko, df4515mod.ko (test driver)
kld-built evidence: production linux_dma-buf.c + dma-buf.h code exercised via real drm.ko symbols