sparc: reuse asm-generic/barrier.h

On sparc 64 bit dma_rmb, dma_wmb, smp_store_mb, smp_mb, smp_rmb,
smp_wmb, read_barrier_depends and smp_read_barrier_depends match the
asm-generic variants exactly. Drop the local definitions and pull in
asm-generic/barrier.h instead.

nop uses __asm__ __volatile but is otherwise identical to
the generic version, drop that as well.

This is in preparation to refactoring this code area.

Note: nop() was in processor.h and not in barrier.h as on other
architectures. Nothing seems to depend on it being there though.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

3 files changed, 2 insertions, 23 deletions

diff --git a/arch/sparc/include/asm/barrier_32.h b/arch/sparc/include/asm/barrier_32.h
index ae69eda288f4..8059130a6cee 100644
--- a/arch/sparc/include/asm/barrier_32.h
+++ b/arch/sparc/include/asm/barrier_32.h
@@ -1,7 +1,6 @@
 #ifndef __SPARC_BARRIER_H
 #define __SPARC_BARRIER_H
 
-#include <asm/processor.h> /* for nop() */
 #include <asm-generic/barrier.h>
 
 #endif /* !(__SPARC_BARRIER_H) */
diff --git a/arch/sparc/include/asm/barrier_64.h b/arch/sparc/include/asm/barrier_64.h
index 14a928601657..26c3f7247f2d 100644
--- a/arch/sparc/include/asm/barrier_64.h
+++ b/arch/sparc/include/asm/barrier_64.h
@@ -37,25 +37,6 @@ do {	__asm__ __volatile__("ba,pt	%%xcc, 1f\n\t" \
 #define rmb()   __asm__ __volatile__("":::"memory")
 #define wmb()   __asm__ __volatile__("":::"memory")
 
-#define dma_rmb()       rmb()
-#define dma_wmb()       wmb()
-
-#define smp_store_mb(__var, __value) \
-        do { WRITE_ONCE(__var, __value); membar_safe("#StoreLoad"); } while(0)
-
-#ifdef CONFIG_SMP
-#define smp_mb()        mb()
-#define smp_rmb()       rmb()
-#define smp_wmb()       wmb()
-#else
-#define smp_mb()        __asm__ __volatile__("":::"memory")
-#define smp_rmb()       __asm__ __volatile__("":::"memory")
-#define smp_wmb()       __asm__ __volatile__("":::"memory")
-#endif
-
-#define read_barrier_depends()          do { } while (0)
-#define smp_read_barrier_depends()      do { } while (0)
-
 #define smp_store_release(p, v)                                         \
 do {                                                                    \
         compiletime_assert_atomic_type(*p);                             \
@@ -74,4 +55,6 @@ do {									\
 #define smp_mb__before_atomic() barrier()
 #define smp_mb__after_atomic()  barrier()
 
+#include <asm-generic/barrier.h>
+
 #endif /* !(__SPARC64_BARRIER_H) */
diff --git a/arch/sparc/include/asm/processor.h b/arch/sparc/include/asm/processor.h
index 2fe99e66e760..9da9646bf6c6 100644
--- a/arch/sparc/include/asm/processor.h
+++ b/arch/sparc/include/asm/processor.h
@@ -5,7 +5,4 @@
 #else
 #include <asm/processor_32.h>
 #endif
-
-#define nop()           __asm__ __volatile__ ("nop")
-
 #endif