diff options
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/include/asm/io.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/blackfin/include/asm/io.h b/arch/blackfin/include/asm/io.h index 29e55b9d88bc..234fbac17ec1 100644 --- a/arch/blackfin/include/asm/io.h +++ b/arch/blackfin/include/asm/io.h @@ -124,7 +124,13 @@ static inline unsigned int readl(const volatile void __iomem *addr) #define iowrite16(val, x) writew(val, x) #define iowrite32(val, x) writel(val, x) -#define mmiowb() wmb() +/** + * I/O write barrier + * + * Ensure ordering of I/O space writes. This will make sure that writes + * following the barrier will arrive after all previous writes. + */ +#define mmiowb() do { SSYNC(); wmb(); } while (0) #define IO_SPACE_LIMIT 0xffffffff |