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-rw-r--r--arch/arm64/include/asm/io.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index ff50dd731852..fd172c41df90 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -110,6 +110,7 @@ static inline u64 __raw_readq(const volatile void __iomem *addr)
#define __io_par(v) __iormb(v)
#define __iowmb() dma_wmb()
+#define __iomb() dma_mb()
/*
* Relaxed I/O memory access primitives. These follow the Device memory