Re: Failed attempt to update graphics/drm-66-kmod

On Wed, 29 Apr 2026 04:11:59 -0700
David Wolfskill <[email protected]> wrote:

> 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.

For anyone not yet noticed it (David and manu@ is already there):
I've filed Bug 294870 for this.

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294870

graphics/drm-61-kmod has the same issue, too.

Noticed just before submitting updates for NVIDIA driver sets
595.71.05, pending it for now (need regenerating patch anyway).

Regards.

-- 
Tomoaki AOKI    <[email protected]>