struct mm_region* region = valloc(sizeof(struct mm_region));
*region = (struct mm_region){ .attr = attr,
.start = start,
struct mm_region* region = valloc(sizeof(struct mm_region));
*region = (struct mm_region){ .attr = attr,
.start = start,
llist_for_each(pos, n, lead, head)
{
llist_for_each(pos, n, lead, head)
{