On Wed, Apr 30, 2014 at 06:54:33PM +0900, AKASHI Takahiro wrote:

> +/*
> + * arch/arm64/kernel/entry-ftrace.S
> + *
> + * Copyright (C) 2013 Linaro Limited
> + * Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <linux/linkage.h>
> +#include <asm/ftrace.h>
> +#include <asm/insn.h>

asm/insn.h contains a bunch of C stuff which won't build without
__ASSEMBLY__ guards unless I'm missing something (I'm working with a
non-mainline tree so I might be).