HelenOS sources

DMA_POLICY_4GiB   130 uspace/drv/bus/usb/xhci/endpoint.c 		flags &= ~DMA_POLICY_4GiB;
DMA_POLICY_4GiB    93 uspace/lib/usb/src/dma_buffer.c 	const bool need_4gib = !!(policy & DMA_POLICY_4GiB);
DMA_POLICY_4GiB   209 uspace/lib/usb/src/dma_buffer.c 		flags &= ~DMA_POLICY_4GiB;