diff options
Diffstat (limited to 'include/linux/io.h')
| -rw-r--r-- | include/linux/io.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/io.h b/include/linux/io.h index 7fd2d2138bf3..069e4075f872 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -67,4 +67,13 @@ int check_signature(const volatile void __iomem *io_addr, const unsigned char *signature, int length); void devm_ioremap_release(struct device *dev, void *res); +/* + * Some systems do not have legacy ISA devices. + * /dev/port is not a valid interface on these systems. + * So for those archs, <asm/io.h> should define the following symbol. + */ +#ifndef arch_has_dev_port +#define arch_has_dev_port() (1) +#endif + #endif /* _LINUX_IO_H */ |