tlb_virt_to_page
page_to_phys(tlb_virt_to_page((unsigned long)kaddr)) + offset_in_page((unsigned long)kaddr);\
struct page *tlb_virt_to_page(unsigned long kaddr);
dmw_virt_to_page((unsigned long)kaddr) : tlb_virt_to_page((unsigned long)kaddr);\
EXPORT_SYMBOL(tlb_virt_to_page);