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Diffstat (limited to 'arch/m68k/include/asm/barrier.h')
-rw-r--r--arch/m68k/include/asm/barrier.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/barrier.h b/arch/m68k/include/asm/barrier.h
new file mode 100644
index 00000000000..445ce22c23c
--- /dev/null
+++ b/arch/m68k/include/asm/barrier.h
@@ -0,0 +1,20 @@
+#ifndef _M68K_BARRIER_H
+#define _M68K_BARRIER_H
+
+/*
+ * Force strict CPU ordering.
+ * Not really required on m68k...
+ */
+#define nop() do { asm volatile ("nop"); barrier(); } while (0)
+#define mb() barrier()
+#define rmb() barrier()
+#define wmb() barrier()
+#define read_barrier_depends() ((void)0)
+#define set_mb(var, value) ({ (var) = (value); wmb(); })
+
+#define smp_mb() barrier()
+#define smp_rmb() barrier()
+#define smp_wmb() barrier()
+#define smp_read_barrier_depends() ((void)0)
+
+#endif /* _M68K_BARRIER_H */