Why exist coding style issue in mm_types.h

Hi, When read the source code of mm_types.h, i encounter _coding style_ code ,such like: http://lxr.free-electrons.com/source/include/linux/mm_types.h#L346 in comments. Why not try to fix it? Because it is trival? Actually, checkpatch.pl reports many errors and warnnings for it. Only can i fix the coding style issue in staging? Sorry for the noisy. -- Best Regards