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From: Arnd Bergmann <arnd@arndb.de>
To: Ingo Molnar <mingo@elte.hu>
Subject: Re: [PATCH] kbuild: drop check for CONFIG_ in headers_check
Date: Sat, 31 Jan 2009 02:06:40 +0100
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Cc: Sam Ravnborg <sam@ravnborg.org>,
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On Saturday 31 January 2009, Ingo Molnar wrote:
> hm, that looks quite ugly and unnatural. Could the usr/* exporting scripts 
> convert these types automatically to the __kernel_* versions?

It's possible, but there are some minor complications, e.g. linux/coda.h has
its own magic code that would likely break in the process, so it needs
to be skipped. Some other files conditionally include <sys/types.h> or
<stdint.h> in user space and would break in a similar way.

For the __kernel_ types, we have 87 instances in the tree, and 53 more that
would have to change. For the int types, there are over 4000 instances
of the correct __u32 style and about 800 that use the u_int32_t or
uint32_t style, most of them in netfilter and linux/pfkeyv2.h.

I'd probably leave at least the drm, netfilter and mtd headers alone,
as they are known to be working and consistently use the stdint.h types.

	Arnd <><