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-rw-r--r--arch/alpha/include/asm/barrier.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/barrier.h b/arch/alpha/include/asm/barrier.h
new file mode 100644
index 0000000000..c56bfffc99
--- /dev/null
+++ b/arch/alpha/include/asm/barrier.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __BARRIER_H
+#define __BARRIER_H
+
+#define mb() __asm__ __volatile__("mb": : :"memory")
+#define rmb() __asm__ __volatile__("mb": : :"memory")
+#define wmb() __asm__ __volatile__("wmb": : :"memory")
+
+#define __smp_load_acquire(p) \
+({ \
+ compiletime_assert_atomic_type(*p); \
+ __READ_ONCE(*p); \
+})
+
+#ifdef CONFIG_SMP
+#define __ASM_SMP_MB "\tmb\n"
+#else
+#define __ASM_SMP_MB
+#endif
+
+#include <asm-generic/barrier.h>
+
+#endif /* __BARRIER_H */