end_ul 835 arch/x86/mm/init.c unsigned long end_ul = (unsigned long)end; end_ul 836 arch/x86/mm/init.c unsigned long len_pages = (end_ul - begin_ul) >> PAGE_SHIFT; end_ul 839 arch/x86/mm/init.c free_init_pages("unused kernel image", begin_ul, end_ul);