Use ARRAY_SIZE macro, rather than explicitly coding some variant of it yourself.
Found with: find -type f -name "*.c" -o -name "*.h" | xargs perl -p -i -e 's/\bsizeof\s*\(\s*(\w+)\s*\)\s*\ /\s*sizeof\s*\(\s*\1\s*\[\s*0\s*\]\s*\) /ARRAY_SIZE(\1)/g' and manual check/verification. Run against version v4.13-rc7 Let me know when you as a maintainer are not interested in these kind of patches. I can exclude you by path; e.g. all findings in "drivers/scsi" will never be reported again by this semi-automatic program runs.