dirty fix to merging

1 files changed, 48 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/barrier.h b/arch/blackfin/include/asm/barrier.h
new file mode 100644
index 00000000..ebb18950
--- /dev/null
+++ b/arch/blackfin/include/asm/barrier.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2004-2009 Analog Devices Inc.
+ *               Tony Kou (tonyko@lineo.ca)
+ *
+ * Licensed under the GPL-2 or later
+ */
+
+#ifndef _BLACKFIN_BARRIER_H
+#define _BLACKFIN_BARRIER_H
+
+#include <asm/cache.h>
+
+#define nop()  __asm__ __volatile__ ("nop;\n\t" : : )
+
+/*
+ * Force strict CPU ordering.
+ */
+#ifdef CONFIG_SMP
+
+#ifdef __ARCH_SYNC_CORE_DCACHE
+/* Force Core data cache coherence */
+# define mb()	do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0)
+# define rmb()	do { barrier(); smp_check_barrier(); } while (0)
+# define wmb()	do { barrier(); smp_mark_barrier(); } while (0)
+# define read_barrier_depends()	do { barrier(); smp_check_barrier(); } while (0)
+#else
+# define mb()	barrier()
+# define rmb()	barrier()
+# define wmb()	barrier()
+# define read_barrier_depends()	do { } while (0)
+#endif
+
+#else /* !CONFIG_SMP */
+
+#define mb()	barrier()
+#define rmb()	barrier()
+#define wmb()	barrier()
+#define read_barrier_depends()	do { } while (0)
+
+#endif /* !CONFIG_SMP */
+
+#define smp_mb()  mb()
+#define smp_rmb() rmb()
+#define smp_wmb() wmb()
+#define set_mb(var, value) do { var = value; mb(); } while (0)
+#define smp_read_barrier_depends()	read_barrier_depends()
+
+#endif /* _BLACKFIN_BARRIER_H */