Re: Recent changes to sysctl.h breaks glibc

[Linus Torvalds]

On Mon, 19 May 2003, Sam Ravnborg wrote:
> 
> Within include/linux grep told me that "#ifdef __KERNEL__" was present
> in 219 places. So a lot of header files are kept in a shape that allows
> them to be included from user-land.

No. They're definitely _not_ "kept in shape".

A number of headers have historical baggage, mainly to support the 
old libc5 habits, and because removing the ifdef's is something that 
nobody has felt was worth the pain.

I think the only header file that should be considered truly exported is 
something like "asm/posix_types.h". For the others, we'll add __KERNEL__ 
protection on demand if the glibc guys can give good arguments that it 
helps them do the "copy-and-cleanup" phase.

		Linus