这段代码可以，佩服作者

#define PCI_HOSE_OP(rw, size, type) \
int pci_hose_##rw##_config_##size(struct pci_controller *hose, \
pci_dev_t dev, \
int offset, type value) \
{ \
return hose->rw##_##size(hose, dev, offset, value); \
}

PCI_HOSE_OP(read, byte, u8 *)
PCI_HOSE_OP(read, word, u16 *)
PCI_HOSE_OP(read, dword, u32 *)
PCI_HOSE_OP(write, byte, u8)
PCI_HOSE_OP(write, word, u16)
PCI_HOSE_OP(write, dword, u32)

这段代码可以，佩服作者

原文：http://www.cnblogs.com/yangv/p/6066568.html