maintainer-feedback requested: [Bug 292192] graphics/drm-66-kmod: fix build with clang 21

Bugzilla Automation <[email protected]> has asked freebsd-x11 (Nobody)
<[email protected]> for maintainer-feedback:
Bug 292192: graphics/drm-66-kmod: fix build with clang 21
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292192



--- Description ---
With clang 21 graphics/drm-66-kmod fails to compile, with errors similar
to:

    In file included from
/wrkdirs/usr/ports/graphics/drm-66-kmod/work/drm-kmod-drm_v6.6.25_9/drivers/gpu
/drm/i915/i915_active.c:12:
   
/wrkdirs/usr/ports/graphics/drm-66-kmod/work/drm-kmod-drm_v6.6.25_9/drivers/gpu
/drm/i915/gt/intel_ring.h:63:2:
error: default initialization of an object of type 'typeof (ring->size)' (aka
'const unsigned int') leaves the object uninitialized
[-Werror,-Wdefault-const-init-var-unsafe]
       63 |	    typecheck(typeof(ring->size), next);
	  |	    ^
    /usr/src/sys/compat/linuxkpi/common/include/linux/typecheck.h:31:9: note:
expanded from macro 'typecheck'
       31 | ({	    type __var1; \
	  |		 ^

The thread at https://lkml.org/lkml/2025/5/6/1681 appears to imply that
it is safe to suppress the new -Wdefault-const-init-var-unsafe warning.