[Xen-devel] [PATCH v2 06/32] s390: reuse asm-generic/barrier.h

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

On s390 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/s390/include/asm/barrier.h | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/arch/s390/include/asm/barrier.h b/arch/s390/include/asm/barrier.h
index 7ffd0b1..c358c31 100644
--- a/arch/s390/include/asm/barrier.h
+++ b/arch/s390/include/asm/barrier.h
@@ -30,14 +30,6 @@
 #define smp_rmb()                      rmb()
 #define smp_wmb()                      wmb()
 
-#define read_barrier_depends()         do { } while (0)
-#define smp_read_barrier_depends()     do { } while (0)
-
-#define smp_mb__before_atomic()                smp_mb()
-#define smp_mb__after_atomic()         smp_mb()
-
-#define smp_store_mb(var, value)       do { WRITE_ONCE(var, value); smp_mb(); 
} while (0)
-
 #define smp_store_release(p, v)                                                
\
 do {                                                                   \
        compiletime_assert_atomic_type(*p);                             \
@@ -53,4 +45,6 @@ do {                                                          
        \
        ___p1;                                                          \
 })
 
+#include <asm-generic/barrier.h>
+
 #endif /* __ASM_BARRIER_H */
-- 
MST


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