On m32r, use the new cmpxchg_local as primitive for the local_cmpxchg
operation.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: takata@linux-m32r.org
CC: linux-m32r@ml.linux-m32r.org
---
include/asm-m32r/local.h | 362 ++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 361 insertions(+), 1 deletion(-)
Index: linux-2.6-lttng/include/asm-m32r/local.h
===================================================================
--- linux-2.6-lttng.orig/include/asm-m32r/local.h 2007-07-20 17:29:08.000000000 -0400
+++ linux-2.6-lttng/include/asm-m32r/local.h 2007-07-20 17:43:28.000000000 -0400
@@ -1,6 +1,366 @@
#ifndef __M32R_LOCAL_H
#define __M32R_LOCAL_H
-#include <asm-generic/local.h>
+/*
+ * linux/include/asm-m32r/local.h
+ *
+ * M32R version:
+ * Copyright (C) 2001, 2002 Hitoshi Yamamoto
+ * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
+ * Copyright (C) 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ */
+
+#include <linux/percpu.h>
+#include <asm/assembler.h>
+#include <asm/system.h>
+#include <asm/local.h>
+
+/*
+ * Atomic operations that C can't guarantee us. Useful for
+ * resource counting etc..
+ */
+
+/*
+ * Make sure gcc doesn't try to be clever and move things around
+ * on us. We need to use _exactly_ the address the user gave us,
+ * not some alias that contains the same information.
+ */
+typedef struct { volatile int counter; } local_t;
+
+#define LOCAL_INIT(i) { (i) }
+
+/**
+ * local_read - read local variable
+ * @l: pointer of type local_t
+ *
+ * Atomically reads the value of @l.
+ */
+#define local_read(l) ((l)->counter)
+
+/**
+ * local_set - set local variable
+ * @l: pointer of type local_t
+ * @i: required value
+ *
+ * Atomically sets the value of @l to @i.
+ */
+#define local_set(l,i) (((l)->counter) = (i))
+
+/**
+ * local_add_return - add long to local variable and return it
+ * @i: long value to add
+ * @l: pointer of type local_t
+ *
+ * ...
