HPAGE_SHIFT        24 arch/x86/include/asm/page_types.h #define HPAGE_SIZE		(_AC(1,UL) << HPAGE_SHIFT)
HPAGE_SHIFT        26 arch/x86/include/asm/page_types.h #define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
HPAGE_SHIFT       425 include/linux/hugetlb.h 	return HPAGE_SHIFT != 0;