Failed attempt to update graphics/drm-66-kmod

David Wolfskill <[email protected]> Wed, 29 Apr 2026 04:11:59 -0700
Newsgroups	gmane.os.freebsd.devel.ports
Message-ID	<[email protected]>
It's possible that I'm doing something stupid (or just "wrong")....

On my main laptop, I track stable/15 & head (different slices -- I
started doing this over 20 years ago & update to a new laptop by copying
the disk drive -- the laptop is only about 10 years old).

In /etc/src.conf, I have:

g1-120(15.1-P)[2] grep '^PORT' /etc/src.conf
PORTS_MODULES+=graphics/drm-66-kmod
PORTS_MODULES+=graphics/gpu-firmware-amd-kmod
PORTS_MODULES+=graphics/gpu-firmware-intel-kmod
PORTS_MODULES+=x11/nvidia-kmod-390

so the various kmod ports get rebuilt when I rebuild the kernel.

Today, I noticed the update from drm-66-kmod-6.6.25.1500508_8 to
drm-66-kmod-6.6.25.1500508_9; no problem (so I thought).

I had built and run

FreeBSD g1-120.catwhisker.org 15.1-PRERELEASE FreeBSD 15.1-PRERELEASE #798 stable/15-n283363-8d584f064885: Tue Apr 28 10:39:26 UTC 2026     [email protected]:/common/S1/obj/usr/src/amd64.amd64/sys/CANARY amd64 1500508 1500508

yesterday (without issue), but after updating sources to
stable/15-n283375-bf1529d83918, then firing up the usual "buildworld"
& friends, the kernel build failed while attempting to build
drm-66-kmod, with whines about "taking address of packed member..."
of a class or structure:

--- intel_guc_ct.o ---
/common/S1/obj/usr/src/amd64.amd64/sys/CANARY/common/ports/graphics/drm-66-kmod/work/drm-kmod-drm_v6.6.25_10/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c:606:19: error: taking address of packed member 'head' of class or structure 'guc_ct_buffer_desc' may result in an unaligned pointer value [-Werror,-Waddress-of-packed-member]
  606 |         head = READ_ONCE(desc->head);
      |                          ^~~~~~~~~~
/usr/src/sys/compat/linuxkpi/common/include/linux/compiler.h:81:37: note: expanded from macro 'READ_ONCE'
   81 |                 (*(const volatile __typeof(x) *)&(x)); \
      |                                                   ^


Any suggestions for suitable evasive action?

Thanks!

Peace,
david
-- 
David H. Wolfskill                              [email protected]

See https://www.catwhisker.org/~david/publickey.gpg for my public key.
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