[PATCH] asm-generic: Support NO_IOPORT_MAP in pci_iomap.h

Stafford Horne
2022-07-22T21:23:02Z

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@arndb.de>
Signed-off-by: Stafford Horne <shorne@gmail.com>
---
The Kconfig I am using to test this is here:
https://github.com/stffrdhrn/linux/commits/or1k-virt-4

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