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Re: [patch] put ptrdiff_t in the kernel and create sys/stddef.h

On Dec 4, 2013, at 1:33 PM, Alan Barrett <> wrote:

> On Wed, 04 Dec 2013, David Holland wrote:
>> (*) A complete scheme for doing it right removes all the _BSD_FOO_T_
>> drivel and ifdefs scattered in userland headers in favor of:
>>  - a single header file that defines all the needed types prefixed
>>    with __, which can be included anywhere;
>>  - in userland, include-guarded header files akin to sys/null.h
>>    that define single or common groups of the names without the
>>    __ prefixes, e.g. <types/size_t.h>;
>>  - including these header files in the proper places, such as in
>>    standard userland header files like stddef.h;
>>  - in the kernel, a single header file that defines all the types
>>    without the __, that is or is exposed to sys/types.h but does
>>    not affect userland.
> Yes, that's one way of doing it right.
> Until such time as somebody does it right, please follow the pattern of 
> what's done already.

which is what my suggested patch does.

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