_PAGE_DIRTY_SHIFT
#define _PAGE_DIRTY (_ULCAST_(1) << _PAGE_DIRTY_SHIFT)
pr_define("_PAGE_DIRTY_SHIFT %d\n", _PAGE_DIRTY_SHIFT);
#define _PAGE_DIRTY (1 << _PAGE_DIRTY_SHIFT)
pr_define("_PAGE_DIRTY_SHIFT %d\n", _PAGE_DIRTY_SHIFT);
#define _PAGE_DIRTY BIT_ULL(_PAGE_DIRTY_SHIFT)