[Linuxarm] [PATCH RFC 2/4] asm-generic/io.h: Add IO_SPACE_BASE

Add a fallback default for IO_SPACE_BASE (at 0) for when an architecture does not define a value.

Signed-off-by: John Garry john.garry@huawei.com --- include/asm-generic/io.h | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h index 9ea83d80eb6f..4d74a0c696ca 100644 --- a/include/asm-generic/io.h +++ b/include/asm-generic/io.h @@ -448,6 +448,10 @@ static inline void writesq(volatile void __iomem *addr, const void *buffer, #define IO_SPACE_LIMIT 0xffff #endif

+#ifndef IO_SPACE_BASE +#define IO_SPACE_BASE 0x0 +#endif + /* * {in,out}{b,w,l}() access little endian I/O. {in,out}{b,w,l}_p() can be * implemented on hardware that needs an additional delay for I/O accesses to