void tlb_invalidate(pde_t *pgdir, void *va) { // Flush the entry only if we're modifying the current address space. // For now, there is only one address space, so always invalidate. invlpg(va); } 遇到这样一段code...然后invlpg是个什么东东 这是个C的嵌入汇编 内嵌汇编语法如下: __asm