lots_o_noops_around_write
p1 = ALIGN_PTR_UP(&lots_o_noops_around_write, PAGE_SIZE);
dprintf3("&lots_o_noops: %p\n", &lots_o_noops_around_write);
assert(p1 == &lots_o_noops_around_write);
lots_o_noops_around_write(&scratch);
lots_o_noops_around_write(&scratch);
lots_o_noops_around_write(&scratch);
lots_o_noops_around_write(&scratch);