r_top            1797 mm/nommu.c     	size_t r_size, r_top;
r_top            1828 mm/nommu.c     		r_top = (region->vm_pgoff << PAGE_SHIFT) + r_size;
r_top            1830 mm/nommu.c     		if (r_top > newsize) {
r_top            1831 mm/nommu.c     			region->vm_top -= r_top - newsize;