SLABS_PER_PAGE    208 drivers/xen/swiotlb-xen.c #define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))
SLABS_PER_PAGE     55 kernel/dma/swiotlb.c #define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))