metag: reuse asm-generic/barrier.h

On metag dma_rmb, dma_wmb, smp_store_mb, read_barrier_depends,
smp_read_barrier_depends, smp_store_release and smp_load_acquire  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@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

diff --git a/arch/metag/include/asm/barrier.h b/arch/metag/include/asm/barrier.h
index 172b7e5efc53f99145f18eccc90d3beb72d0a435..b5b778bb0b33a09bba089b3169e724c0d7125d27 100644 (file)
--- a/arch/metag/include/asm/barrier.h
+++ b/arch/metag/include/asm/barrier.h
@@ -44,9 +44,6 @@ static inline void wr_fence(void)
 #define rmb()          barrier()
 #define wmb()          mb()
 
-#define dma_rmb()      rmb()
-#define dma_wmb()      wmb()
-
 #ifndef CONFIG_SMP
 #define fence()                do { } while (0)
 #define smp_mb()        barrier()
@@ -81,27 +78,9 @@ static inline void fence(void)
 #endif
 #endif
 
-#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 smp_store_release(p, v)                                                \
-do {                                                                   \
-       compiletime_assert_atomic_type(*p);                             \
-       smp_mb();                                                       \
-       WRITE_ONCE(*p, v);                                              \
-} while (0)
-
-#define smp_load_acquire(p)                                            \
-({                                                                     \
-       typeof(*p) ___p1 = READ_ONCE(*p);                               \
-       compiletime_assert_atomic_type(*p);                             \
-       smp_mb();                                                       \
-       ___p1;                                                          \
-})
-
 #define smp_mb__before_atomic()        barrier()
 #define smp_mb__after_atomic() barrier()
 
+#include <asm-generic/barrier.h>
+
 #endif /* _ASM_METAG_BARRIER_H */