ppc64: use common 32bit ioctl code

arch/ppc64/kernel/Makefile

@@ -31,3 +31,5 @@ obj-$(CONFIG_SMP)		+= smp.o
 obj-$(CONFIG_MODULES)		+= module.o ppc_ksyms.o
 obj-$(CONFIG_PPC_RTAS)		+= rtas-proc.o
 obj-$(CONFIG_SCANLOG)		+= scanlog.o
+
+CFLAGS_ioctl32.o += -Ifs/

include/asm-ppc64/uaccess.h

@@ -226,10 +226,22 @@ copy_to_user(void *to, const void *from, unsigned long n)
 	return n;
 }
 
+static inline unsigned long
+copy_in_user(void *to, const void *from, unsigned long n)
+{
+        if (!access_ok(VERIFY_READ, from, n) ||
+	     !access_ok(VERIFY_WRITE, to, n))
+		return n;
+
+	return __copy_tofrom_user(to, from, n);
+}
+
 #define __copy_from_user(to, from, size) \
 	__copy_tofrom_user((to), (from), (size))
 #define __copy_to_user(to, from, size) \
 	__copy_tofrom_user((to), (from), (size))
+#define __copy_in_user(to, from, size) \
+	__copy_tofrom_user((to), (from), (size))
 
 extern unsigned long __clear_user(void *addr, unsigned long size);