PGA_REFERENCED
attrs |= (PGA_REFERENCED|PGA_MODIFIED);
attrs |= PGA_REFERENCED;
if ((attrs & PGA_REFERENCED) == 0)
if (md->pvh_listx & PGA_REFERENCED) {
md->pvh_listx &= ~PGA_REFERENCED;
md->pvh_listx |= (PGA_REFERENCED|PGA_MODIFIED);
md->pvh_listx |= PGA_REFERENCED;
#define PGA_ATTRS (PGA_MODIFIED | PGA_REFERENCED)
(((pg)->mdpage.pvh_listx & PGA_REFERENCED) != 0)