Re: [PATCH 1/2] asm-generic: current: Don't include thread-info.h if building asm

[Richard Weinberger]

----- Ursprüngliche Mail -----
> Von: "davidgow" <davidgow@xxxxxxxxxx>
> asm/current.h is included by some assembly files (either directly, or
> indirectly). This works on some architectures (such as x86), as their
> implementation of current.h is careful to not include any C, but the
> asm-generic version includes linux/thread-info.h unconditionally, which
> leads to errors when either C code or non-asm-compatible preprocessor
> directives are included.
> 
> Just wrap the contents behind an #ifndef __ASSEMBLY__ to avoid any C
> code making its way in.
> 
> Signed-off-by: David Gow <davidgow@xxxxxxxxxx>
> ---
> 
> This is requrired for patch #2 here, as UML uses this asm-generic
> header, but works with x86 assembly files which are expecting the x86
> current.h, which is assembly-friendly.
> 
> ---
> include/asm-generic/current.h | 2 ++
> 1 file changed, 2 insertions(+)
> 
> diff --git a/include/asm-generic/current.h b/include/asm-generic/current.h
> index 3a2e224b9fa0..9c2aeecbd05a 100644
> --- a/include/asm-generic/current.h
> +++ b/include/asm-generic/current.h
> @@ -2,9 +2,11 @@
> #ifndef __ASM_GENERIC_CURRENT_H
> #define __ASM_GENERIC_CURRENT_H
> 
> +#ifndef __ASSEMBLY__
> #include <linux/thread_info.h>
> 
> #define get_current() (current_thread_info()->task)
> #define current get_current()
> +#endif
> 
> #endif /* __ASM_GENERIC_CURRENT_H */

I'm fine with the UML side of this change but the generic part needs Arnd's ACK.

Thanks,
//richard