make buildkernel 5.2.1 -> 5.3-BETA3 error (mem_range_attr_set / DRM)

[dsw]

Hi List,

Going from 5.2.1-RELEASE to 5.3-BETA3, and compiling a non-SMP custom kernel with
radeondrm I get the following breakage:

...snip...

linking kernel
radeon_drv.o(.text+0x5346): In function `radeon_mtrr_add':
: undefined reference to `mem_range_attr_set'
radeon_drv.o(.text+0x53a2): In function `radeon_mtrr_del':
: undefined reference to `mem_range_attr_set'

I saw a recent thread where Robert Watson committed a change to mp_machdep.c
and machdep.c which fixed a /similar/ error, but this seems unrelated.

I have checked out the RELENG_5 tree from scratch just in case there was
any cruft left from 5.2.1, but still the same error.. 

Has anyone else seen/fixed this?

Cheers

D.

-- 
Brennen der bruecken.