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Date: Tue, 15 May 2018 15:59:25 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>, Alexey Dobriyan
 <adobriyan@gmail.com>, Lihao Liang <lianglihao@huawei.com>,
 linux-kernel@vger.kernel.org, Philippe Ombredanne <pombredanne@nexb.com>,
 Pekka Enberg <penberg@kernel.org>, Greg Kroah-Hartman
 <gregkh@linuxfoundation.org>
Subject: Re: [PATCH 3/3] types: use fixed width types without
 double-underscore prefix
Message-Id: <20180515155925.9c16962e2b416e5f507c07b1@linux-foundation.org>
In-Reply-To: <1526350925-14922-3-git-send-email-yamada.masahiro@socionext.com>
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	<1526350925-14922-3-git-send-email-yamada.masahiro@socionext.com>
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On Tue, 15 May 2018 11:22:05 +0900 Masahiro Yamada <yamada.masahiro@socionext.com> wrote:

> This header file is not exported.  It is safe to reference types
> without double-underscore prefix.
> 

It may be safe to do this, but why is it desirable?

> index be15897..9834e90 100644
> --- a/include/linux/types.h
> +++ b/include/linux/types.h
> @@ -10,14 +10,14 @@
>  #define DECLARE_BITMAP(name,bits) \
>  	unsigned long name[BITS_TO_LONGS(bits)]
>  
> -typedef __u32 __kernel_dev_t;
> +typedef u32 __kernel_dev_t;
>
> ...
>