[PATCH 2/2] arm64: io: Hook up __io_par() for inX() ordering

Will Deacon
2019-02-11T17:45:59Z

Ensure that inX() provides the same ordering guarantees as readX()
by hooking up __io_par() so that it maps directly to __iormb().

Reported-by: Andrew Murray <andrew.murray@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
---
arch/arm64/include/asm/io.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index ee723835c1f4..2985febe63ec 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -121,6 +121,7 @@ static inline u64 __raw_readq(const volatile void __iomem *addr)
: "memory"); \
})

+#define __io_par __iormb
#define __iowmb() wmb()

#define mmiowb() do { } while (0)
--
2.11.0