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SubjectRe: [RFC] Splitting out kernel<=>userspace ABI headers
Erik Andersen wrote:
> I assume you are worried about the stuff under asm that ends up
> being included by nearly every header file in the world. Of
> course asm must use double-underscore types. But the thing is,
> the vast majority of the kernel headers live under
> linux/include/linux/ and do not use double-underscore types, they
> use kernel specific, non-underscored types such as s8, u32, etc.
> My copy of IEEE 1003.1 and my copy of ISO/IEC 9899:1999 both fail
> to prohibit using the shiny new ISO C99 type for the various
> #include <linux/*> header files, which is what I was suggesting.
> The world would be so much nicer a place if user space were free
> to #include linux/* header files rather than keeping a
> per-project private copy of all kernel structs of interest. And
> where these kernel headers would #include stdint.h and define
> their stucts in terms of ISO C99 types. I see nothing at all in
> the standards preventing such a change,

Exportable types need to be double-underscore types, because the header
files in user space that would include them can generally not include

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