DF-2984 fix-build log (single-fix kernel #1, in-guest)
======================================================

Commands (root @ guest, after `vm.sh reset with-src`):

  cd /usr/src && patch -p1 < /root/fix2.diff
  make -j6 nativekernel
  make installkernel
  shutdown -r now

Transcript (captured from the vm.sh run_root session, 2026-09-04 17:29-17:37 UTC):

  Patching file sys/kern/kern_syscalls.c using Plan A...
  Hunk #1 succeeded at 72.
  Hunk #2 succeeded at 100.
  Hunk #3 succeeded at 118.
  Patching file sys/sys/sysent.h using Plan A...
  Hunk #1 succeeded at 87.
  done
  PATCHED
  KBUILD_RC=0
  --------------------------------------------------------------
  >>> Kernel build for X86_64_GENERIC completed on Fri Sep  4 17:35:53 UTC 2026
  --------------------------------------------------------------
  IK_RC=0
  >>> Kernel install for X86_64_GENERIC completed on Fri Sep  4 17:37:14 UTC 2026
  --------------------------------------------------------------

Patched kernel booted and verified:
  DragonFly dfbsd 6.5-DEVELOPMENT DragonFly 6.5-DEVELOPMENT #1: Fri Sep  4
  17:32:24 UTC 2026  root@dfbsd:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64

(The KLD compile against the patched tree is fix_build_kld.log / build.log;
the per-run outputs are run.log / run.modc.log (baseline) and fix_run.log
(patched).)