VIRT_PAGE_BASE     12 sound/soc/codecs/tscs454.h #define VIRT_ADDR(page, address) (VIRT_PAGE_BASE(page) + address)
VIRT_PAGE_BASE     13 sound/soc/codecs/tscs454.h #define ADDR(page, virt_address) (virt_address - VIRT_PAGE_BASE(page))