Messages in this thread | | | From | Kyle Moffett <> | Subject | Re: [RFC] Splitting kernel headers and deprecating __KERNEL__ | Date | Fri, 26 Nov 2004 22:07:18 -0500 |
| |
On Nov 25, 2004, at 10:13, David Howells wrote: > We've been discussing splitting the kernel headers into userspace API > headers > and kernel internal headers and deprecating the __KERNEL__ macro. This > will > permit a cleaner interface between the kernel and userspace; and one > that's > easier to keep up to date.
Yay!!! Finally!!!
> NEW DIRECTORY DIRECTORY SHADOWED > ============= ================== > include/user/ include/linux/ > include/user-*/ include/asm-*/
How about include/abi for the platform-independent headers and include/arch-* for the platform-specific headers? Then include/arch would be symlinked to the correct arch-* directory.
> Note that this doesn't take account of the other directories under > include/, but I don't think they're relevant.
Perhaps such directories should either be broken out into abi/foo<->linux/foo pieces, or put into their own top-level directories.
> (2) Take each file from the shadowed directory. If it has any > userspace > relevant stuff, then: [...snip...]
Something like this would warn about incorrect uses of the linux/ headers, yet still allow for a period of backwards compatibility. Once such period has passed, then linux/* would not even be installed, only abi/* and arch/*
include/linux/foo.h: #ifndef _LINUX_FOO_H #define _LINUX_FOO_H 1
#ifndef __KERNEL__ # warning "Directly including <kernel/foo.h> is deprecated!!!" # warning "Please change your program to include <abi/foo.h> instead!!!" #endif
#include <abi/foo.h>
#ifdef __KERNEL__ /* Old __KERNEL__ contents of include/linux/foo.h */ #endif
#endif /* not _LINUX_FOO_H */
include/abi/foo.h: #ifndef _ABI_FOO_H #define_ABI_FOO_H 1
#include <abi/bar.h> #include <arch/baz.h>
/* Old non-__KERNEL__ contents of include/linux/foo.h */
#endif /* not _ABI_FOO_H */
Cheers, Kyle Moffett
-----BEGIN GEEK CODE BLOCK----- Version: 3.12 GCM/CS/IT/U d- s++: a17 C++++>$ UB/L/X/*++++(+)>$ P+++(++++)>$ L++++(+++) E W++(+) N+++(++) o? K? w--- O? M++ V? PS+() PE+(-) Y+ PGP+++ t+(+++) 5 X R? tv-(--) b++++(++) DI+ D+ G e->++++$ h!*()>++$ r !y?(-) ------END GEEK CODE BLOCK------
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |