When building OpenRISC PCI which has no ioport_map we get the following build error. lib/pci_iomap.c: In function 'pci_iomap_range': CC drivers/i2c/i2c-core-base.o ./include/asm-generic/pci_iomap.h:29:41: error: implicit declaration of function 'ioport_map'; did you mean 'ioremap'? [-Werror=implicit-function-declaration] 29 | #define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr)) | ^~~~~~~~~~ lib/pci_iomap.c:44:24: note: in expansion of macro '__pci_ioport_map' 44 | return __pci_ioport_map(dev, start, len); | ^~~~~~~~~~~~~~~~ This patch adds a NULL definition of __pci_ioport_map for architetures which do not support ioport_map. Suggested-by: Arnd Bergmann <arnd@xxxxxxxx> Signed-off-by: Stafford Horne <shorne@xxxxxxxxx> --- include/asm-generic/pci_iomap.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/asm-generic/pci_iomap.h b/include/asm-generic/pci_iomap.h index 5a2f9bf53384..8fbb0a55545d 100644 --- a/include/asm-generic/pci_iomap.h +++ b/include/asm-generic/pci_iomap.h @@ -25,6 +25,8 @@ extern void pci_iounmap(struct pci_dev *dev, void __iomem *); #ifdef CONFIG_NO_GENERIC_PCI_IOPORT_MAP extern void __iomem *__pci_ioport_map(struct pci_dev *dev, unsigned long port, unsigned int nr); +#elif !defined(CONFIG_HAS_IOPORT_MAP) +#define __pci_ioport_map(dev, port, nr) NULL #else #define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr)) #endif -- 2.36.1