arch/x86/kernel/cpu/mtrr/cleanup.c:943:4: warning: Value stored to 'highest_pfn' is never read In the following kernel version: name: linux-next url:https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git branch: next-20231017 commit: 4d5ab2376ec576af173e5eac3887ed0b51bd8566