[PATCH 11/34] metag: reuse asm-generic/barrier.h

Michael S. Tsirkin
2015-12-30T13:25:13Z

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>
---

This is straightforward, but unfortunately untested: I don't have a metag compiler.
I would appreciate an ack from someone with a metag compiler.

arch/metag/include/asm/barrier.h | 25 ++-----------------------
1 file changed, 2 insertions(+), 23 deletions(-)

diff --git a/arch/metag/include/asm/barrier.h b/arch/metag/include/asm/barrier.h
index 172b7e5..b5b778b 100644
--- 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 */
--
MST