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Index: postgresql-9.4-9.4~beta2/src/include/storage/barrier.h
===================================================================
--- postgresql-9.4-9.4~beta2.orig/src/include/storage/barrier.h
+++ postgresql-9.4-9.4~beta2/src/include/storage/barrier.h
@@ -117,7 +117,7 @@ extern slock_t dummy_spinlock;
* read barrier to cover that case. We might need to add that later.
*/
#define pg_memory_barrier() __asm__ __volatile__ ("mb" : : : "memory")
-#define pg_read_barrier() __asm__ __volatile__ ("rmb" : : : "memory")
+#define pg_read_barrier() __asm__ __volatile__ ("mb" : : : "memory")
#define pg_write_barrier() __asm__ __volatile__ ("wmb" : : : "memory")
#elif defined(__hppa) || defined(__hppa__) /* HP PA-RISC */
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