3554   size_t released = 0;  in release_unused_segments()  local
3576           released += size;  in release_unused_segments()
3590   return released;  in release_unused_segments()
3594   size_t released = 0;  in sys_trim()  local
3614               released = extra;  in sys_trim()
3629                 released = old_br - new_br;  in sys_trim()
3636       if (released != 0) {  in sys_trim()
3637         sp->size -= released;  in sys_trim()
3638         m->footprint -= released;  in sys_trim()
3639         init_top(m, m->top, m->topsize - released);  in sys_trim()
3646       released += release_unused_segments(m);  in sys_trim()
3649     if (released == 0)  in sys_trim()
3653   return (released != 0)? 1 : 0;  in sys_trim()