Comment 2 for bug 1709197

It seems to be a compiler failure:

In file included from ./arch/x86/include/asm/cpufeature.h:4:
./arch/x86/include/asm/processor.h:464:30: warning: taking address of packed member 'sp0' of class or structure 'x86_hw_tss' may result in an unaligned pointer value [-Waddress-of-packed-member]
        return this_cpu_read_stable(cpu_tss.x86_tss.sp0);
                                    ^~~~~~~~~~~~~~~~~~~
./arch/x86/include/asm/percpu.h:391:59: note: expanded from macro 'this_cpu_read_stable'
#define this_cpu_read_stable(var) percpu_stable_op("mov", var)
                                                                ^~~
./arch/x86/include/asm/percpu.h:233:16: note: expanded from macro 'percpu_stable_op'
                    : "p" (&(var))); \
                             ^~~
fatal error: error in backend: expected absolute expression
make[2]: *** [/var/lib/dkms/nvidia-375/375.66/build/nvidia-uvm/uvm8_pmm_gpu.o] Error 1
make[2]: *** Waiting for unfinished jobs....