HelenOS sources
dma_policy_create 133 uspace/drv/bus/usb/xhci/endpoint.c ep->transfer_buffer_policy = dma_policy_create(flags, 1 << 16);
dma_policy_create 136 uspace/drv/bus/usb/xhci/endpoint.c ep->required_transfer_buffer_policy = dma_policy_create(flags, PAGE_SIZE);
dma_policy_create 80 uspace/lib/usb/include/usb/dma_buffer.h extern dma_policy_t dma_policy_create(unsigned, size_t);
dma_policy_create 112 uspace/lib/usb/src/dma_buffer.c db->policy = dma_policy_create(policy, 0);
dma_policy_create 204 uspace/lib/usb/src/dma_buffer.c db->policy = dma_policy_create(0, PAGE_SIZE);
dma_policy_create 210 uspace/lib/usb/src/dma_buffer.c db->policy = dma_policy_create(flags, PAGE_SIZE);
HelenOS homepage, sources at GitHub