1 files changed, 24 insertions, 0 deletions
diff --git a/arch/tile/lib/uaccess.c b/arch/tile/lib/uaccess.c
new file mode 100644
index 000000000..030abe3ee
--- /dev/null
+++ b/arch/tile/lib/uaccess.c
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   This program is free software; you can redistribute it and/or
+ *   modify it under the terms of the GNU General Public License
+ *   as published by the Free Software Foundation, version 2.
+ *
+ *   This program is distributed in the hope that it will be useful, but
+ *   WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#include <linux/uaccess.h>
+#include <linux/module.h>
+
+int __range_ok(unsigned long addr, unsigned long size)
+{
+	unsigned long limit = current_thread_info()->addr_limit.seg;
+	return !((addr < limit && size <= limit - addr) ||
+		 is_arch_mappable_range(addr, size));
+}
+EXPORT_SYMBOL(__range_ok);