linux-kernel - Re: rc4-mmotm1110 - Another build error

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Date:	Tue, 11 Nov 2008 15:54:38 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Valdis.Kletnieks@...edu, linux-kernel@...r.kernel.org
Subject: Re: rc4-mmotm1110 - Another build error

On Mon, 10 Nov 2008 19:43:53 -0800
Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Mon, 10 Nov 2008 22:20:33 -0500 Valdis.Kletnieks@...edu wrote:
> 
> > gcc --version says:
> > gcc (GCC) 4.3.2 20081105 (Red Hat 4.3.2-7)
> > 
> > ka-blam number 2:
> > 
> >   CC      kernel/audit.o
> > In file included from include/net/dst.h:15,
> >                  from include/net/sock.h:57,
> >                  from kernel/audit.c:54:
> > include/net/neighbour.h:114: error: braced-group within expression allowed only inside a function
> > make[1]: *** [kernel/audit.o] Error 1
> > 
> > I'm placing bets on patches/align-avoid-evaluating-its-argument-twice.patch
> > 
> > Yep, revert that patch, and audit.o compiles again.
> > 
> 
> I hadn't got around to testing that one yet.
> 
> So ug.  ALIGN() is used in array sizing and hence has to be a
> compile-time thing.  But ALIGN(foo, bar()) will call bar() twice.
> 
> Now how do we fix that?

How about provoding
  - ALIGN()  - args can be evaluated twice.
 and
  - static inline unsigned long align()

messy ?

Thanks,
-Kame



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