Re: [mingo@elte.hu: [git pull] headers_check fixes]

[H. Peter Anvin]

Linus Torvalds wrote:
> > >
> > This is probably true.  I think we should add this as one more of the
> > preprocessing rules which we really should just do, as well as automatic
> > mangling of integer types.
>
> Btw, the really scary thing is that I bet there are programs out there 
> that "know" about kernel internals, and do things like
>
> 	#define CONFIG_SMP 1
> 	#define __KERNEL__ 1
> 	#include <asm/atomic.h>
>
> in order to get the atomic helpers from the kernel, and using CONFIG_xyz 
> markers to force the exact version they want.
>
> And we will inevitably always end up breaking stuff like that. Nothing we 
> can do about it - in the end, users can do infinitely odd things and know 
> about our internals, and whatever changes we do will occasionally break 
> some of the more incestuous code.

Yes, that's just PEBKAC.

	-hpa

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