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-rw-r--r--arch/tile/lib/uaccess.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/tile/lib/uaccess.c b/arch/tile/lib/uaccess.c
new file mode 100644
index 000000000000..f8d398c9ee7f
--- /dev/null
+++ b/arch/tile/lib/uaccess.c
@@ -0,0 +1,32 @@
+/*
+ * 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);
+
+#ifdef CONFIG_DEBUG_COPY_FROM_USER
+void copy_from_user_overflow(void)
+{
+ WARN(1, "Buffer overflow detected!\n");
+}
+EXPORT_SYMBOL(copy_from_user_overflow);
+#endif