1 files changed, 41 insertions, 0 deletions

diff --git a/arch/powerpc/lib/usercopy.c b/arch/powerpc/lib/usercopy.c
new file mode 100644
index 000000000000..5eea6f3c1e03
--- /dev/null
+++ b/arch/powerpc/lib/usercopy.c
@@ -0,0 +1,41 @@
+/*
+ * Functions which are too large to be inlined.
+ *
+ * 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; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/module.h>
+#include <asm/uaccess.h>
+
+unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+        if (likely(access_ok(VERIFY_READ, from, n)))
+                n = __copy_from_user(to, from, n);
+        else
+                memset(to, 0, n);
+        return n;
+}
+
+unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+        if (likely(access_ok(VERIFY_WRITE, to, n)))
+                n = __copy_to_user(to, from, n);
+        return n;
+}
+
+unsigned long copy_in_user(void __user *to, const void __user *from,
+                           unsigned long n)
+{
+        might_sleep();
+        if (likely(access_ok(VERIFY_READ, from, n) &&
+            access_ok(VERIFY_WRITE, to, n)))
+                n =__copy_tofrom_user(to, from, n);
+        return n;
+}
+
+EXPORT_SYMBOL(copy_from_user);
+EXPORT_SYMBOL(copy_to_user);
+EXPORT_SYMBOL(copy_in_user);
+