xen_get_swiotlb_free_pages  211 drivers/xen/swiotlb-xen.c 			xen_io_tlb_start = (void *)xen_get_swiotlb_free_pages(order);
xen_get_swiotlb_free_pages  111 include/xen/arm/page.h unsigned long xen_get_swiotlb_free_pages(unsigned int order);