oldbrk            190 mm/mmap.c      	unsigned long newbrk, oldbrk, origbrk;
oldbrk            230 mm/mmap.c      	oldbrk = PAGE_ALIGN(mm->brk);
oldbrk            231 mm/mmap.c      	if (oldbrk == newbrk) {
oldbrk            249 mm/mmap.c      		ret = __do_munmap(mm, newbrk, oldbrk-newbrk, &uf, true);
oldbrk            260 mm/mmap.c      	next = find_vma(mm, oldbrk);
oldbrk            265 mm/mmap.c      	if (do_brk_flags(oldbrk, newbrk-oldbrk, 0, &uf) < 0)
oldbrk            270 mm/mmap.c      	populate = newbrk > oldbrk && (mm->def_flags & VM_LOCKED) != 0;
oldbrk            277 mm/mmap.c      		mm_populate(oldbrk, newbrk - oldbrk);