Sorry I didn't notice earlier - my 3.18/4.1 build scripts were broken.
arch/mips/kernel/setup.c: In function 'arch_mem_init':
arch/mips/kernel/setup.c:689:2: error: implicit declaration of function
'reserve_bootmem_region'
Offending commit is 1dd0964204277108e ("MIPS: Reserve nosave data for
hibernation").
It fixes a bug which does not exist in 3.18 / 4.1, in turn causing all mips
builds in 3.18
and 4.1 to fail.
Guenter
