On Tue, 15 May 2018 11:22:05 +0900 Masahiro Yamada 
<[email protected]> 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;
>
> ...
>

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