global_dirty_limits
void global_dirty_limits(unsigned long *pbackground, unsigned long *pdirty);
global_dirty_limits(&background_thresh, &dirty_thresh);
global_dirty_limits(&background_thresh, &dirty_thresh);
global_dirty_limits(&background_thresh, &dirty_thresh);
global_dirty_limits(&background_thresh, &dirty_thresh);
global_dirty_limits(&background_thresh, &dirty_thresh);
global_dirty_limits(v + NR_DIRTY_BG_THRESHOLD,