VFF_RING_WRAP     172 drivers/dma/mediatek/mtk-uart-apdma.c 		wpt = (wpt & VFF_RING_WRAP) ^ VFF_RING_WRAP;
VFF_RING_WRAP     243 drivers/dma/mediatek/mtk-uart-apdma.c 	if ((rg ^ wg) & VFF_RING_WRAP)