page_to_phys      138 arch/x86/include/asm/io.h #define page_to_phys(page)    ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)
page_to_phys       90 include/asm-generic/page.h #define page_to_phys(page)      ((dma_addr_t)page_to_pfn(page) << PAGE_SHIFT)