[Xen-devel] [PATCH v2 09/32] arm64: reuse asm-generic/barrier.h

["Michael S. Tsirkin" <mst@xxxxxxxxxx>]

On arm64 nop, read_barrier_depends, smp_read_barrier_depends
smp_store_mb(), smp_mb__before_atomic and smp_mb__after_atomic match the
asm-generic variants exactly. Drop the local definitions and pull in
asm-generic/barrier.h instead.

This is in preparation to refactoring this code area.

Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 arch/arm64/include/asm/barrier.h | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h
index 9622eb4..91a43f4 100644
--- a/arch/arm64/include/asm/barrier.h
+++ b/arch/arm64/include/asm/barrier.h
@@ -91,14 +91,7 @@ do {                                                         
        \
        __u.__val;                                                      \
 })
 
-#define read_barrier_depends()         do { } while(0)
-#define smp_read_barrier_depends()     do { } while(0)
-
-#define smp_store_mb(var, value)       do { WRITE_ONCE(var, value); smp_mb(); 
} while (0)
-#define nop()          asm volatile("nop");
-
-#define smp_mb__before_atomic()        smp_mb()
-#define smp_mb__after_atomic() smp_mb()
+#include <asm-generic/barrier.h>
 
 #endif /* __ASSEMBLY__ */
 
-- 
MST


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