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Date: Mon, 14 Sep 2009 16:58:55 +0800
From: Li Zefan <lizf@cn.fujitsu.com>
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Subject: Re: [PATCH 2/3] ftrace: Add compile-time check on F_printk()
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> +static void __used ____ftrace_check_##name(void)		\

oops, I should use "__maybe_unused"..

> +{								\
> +	struct ____ftrace_##name *__entry = NULL;		\
> +								\
> +	/* force cmpile-time check on F_printk() */		\
> +	printk(print);						\
> +}