linux-kernel - Re: [Patch] string: do not export memweight() to userspace

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Date:	Mon, 6 Aug 2012 21:40:47 +0900
From:	Akinobu Mita <akinobu.mita@...il.com>
To:	Cong Wang <amwang@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	WANG Cong <xiyou.wangcong@...il.com>,
	Joern Engel <joern@...fs.org>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>
Subject: Re: [Patch] string: do not export memweight() to userspace

2012/8/6 Cong Wang <amwang@...hat.com>:
> From: WANG Cong <xiyou.wangcong@...il.com>
>
> This patch fixes the following warning:
>
> usr/include/linux/string.h:8: userspace cannot reference function or variable defined in the kernel

Thanks for finding this problem.
Looks good to me.

> Cc: Akinobu Mita <akinobu.mita@...il.com>
> Signed-off-by: WANG Cong <xiyou.wangcong@...il.com>
>
> ---
> diff --git a/include/linux/string.h b/include/linux/string.h
> index ffe0442..b917881 100644
> --- a/include/linux/string.h
> +++ b/include/linux/string.h
> @@ -144,8 +144,8 @@ static inline bool strstarts(const char *str, const char *prefix)
>  {
>         return strncmp(str, prefix, strlen(prefix)) == 0;
>  }
> -#endif
>
>  extern size_t memweight(const void *ptr, size_t bytes);
>
> +#endif /* __KERNEL__ */
>  #endif /* _LINUX_STRING_H_ */
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