taglinefilesource code
from_dir807mm/memory.cpgd_t * from_dir, * to_dir;
from_dir812mm/memory.cfrom_dir = pgd_offset(from_area->vm_task,from_address);
from_dir814mm/memory.cif (pgd_none(*from_dir))
from_dir816mm/memory.cif (pgd_bad(*from_dir)) {
from_dir817mm/memory.cprintk("try_to_share: bad page directory %08lx\n", pgd_val(*from_dir));
from_dir818mm/memory.cpgd_clear(from_dir);
from_dir821mm/memory.cfrom_middle = pmd_offset(from_dir, from_address);