Unable to build drm-fbsd12.0-kmod

[Stephen Montgomery-Smith]

I just updated to the latest stable version of FreeBSD 12.  Now when I 
try to build drm-fbsd12.0-kmod I get a build error, part of which is 
reproduced below.  Is there any help for me?


--- linux_i2c.o ---
cc  -O2 -pipe -fno-strict-aliasing -include 
/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/drivers/gpu/drm/drm_os_config.h 
'-DKBUILD_MODNAME="linuxkpi_gplv2"'  -Werror -D_KERNEL -DKLD_MODULE 
-nostdinc 
-I/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/include 
-I/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/linuxkpi/dummy/include 
-I/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/linuxkpi/gplv2/include 
-I/usr/src/sys/compat/linuxkpi/common/include -I. -I/usr/src/sys 
-I/usr/src/sys/contrib/ck/include -fno-common  -fno-omit-frame-pointer 
-mno-omit-leaf-frame-pointer 
-fdebug-prefix-map=./machine=/usr/src/sys/amd64/include 
-fdebug-prefix-map=./x86=/usr/src/sys/x86/include   -MD 
-MF.depend.linux_i2c.o -MTlinux_i2c.o -mcmodel=kernel -mno-red-zone 
-mno-mmx -mno-sse -msoft-float  -fno-asynchronous-unwind-tables 
-ffreestanding -fwrapv -fstack-protector -Wall -Wredundant-decls 
-Wnested-externs -Wstrict-prototypes -Wmissing-prototypes 
-Wpointer-arith -Wcast-qual -Wundef -Wno--- linux_backlight.o ---
In file included from 
/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/linuxkpi/gplv2/src/linux_backlight.c:13:
In file included from 
/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/linuxkpi/gplv2/include/linux/backlight.h:12:
In file included from 
/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/linuxkpi/gplv2/include/linux/fb.h:4:
In file included from 
/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/linuxkpi/gplv2/include/uapi/linux/fb.h:5:
In file included from 
/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/linuxkpi/gplv2/include/linux/i2c.h:9:
/usr/ports/graphics/drm-fbsd12.0-kmod/work/kms-drm-fa1387d/linuxkpi/gplv2/include/linux/of.h:51:1: 
error: expected identifier or '('
of_node_to_nid(struct device_node *device)
^
/usr/src/sys/compat/linuxkpi/common/include/linux/device.h:559:30: note: 
expanded from macro 'of_node_to_nid'
#define of_node_to_nid(node) -1
                              ^
1 error generated.