linux-kernel - Re: [GIT PULL] XFS update for 2.6.27-rc4

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Message-Id: <20080814160327.bf2a2673.akpm@linux-foundation.org>
Date:	Thu, 14 Aug 2008 16:03:27 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Dave Chinner <david@...morbit.com>
Cc:	geert@...ux-m68k.org, lachlan@....com,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	xfs@....sgi.com, linux-m68k@...r.kernel.org
Subject: Re: [GIT PULL] XFS update for 2.6.27-rc4

On Fri, 15 Aug 2008 08:51:30 +1000
Dave Chinner <david@...morbit.com> wrote:

> > |   CC      arch/m68k/kernel/asm-offsets.s
> > | In file included from linux/include/linux/mm_types.h:12,
> > |                  from linux/include/linux/sched.h:61,
> > |                  from linux/arch/m68k/kernel/asm-offsets.c:12:
> > | linux/include/linux/completion.h: In function 'try_wait_for_completion':
> > | linux/include/linux/completion.h:80: error: dereferencing pointer to incomplete type
> > | linux/include/linux/completion.h: In function 'completion_done':
> > | linux/include/linux/completion.h:99: error: dereferencing pointer to incomplete type
> > | make[3]: *** [arch/m68k/kernel/asm-offsets.s] Error 1
> > | make[2]: *** [prepare0] Error 2
> > | make[1]: *** [sub-make] Error 2
> > 
> > (cfr. http://kisskb.ellerman.id.au/kisskb/buildresult/42080/)
> > 
> > Apparently there was not sufficient time between entering linux-next and
> > Linus' tree to notice this breakage before, while the original patch was already
> > posted on July 11...
> 
> It spent the time between then and now in the -mm tree. Seems
> like nobody is building m68k out of -mm.

I test m68k build regularly, but only allmodconfig.

Our (complexity(config system) * complexity(header files)) is so large
that compilation testing doesn't prove anything useful.  You just have
to check your homework very carefully and don earplugs for the
inevitable explosions.

> I'm out for the next 3 days, but it seems to me that the easiest fix
> is to move that code out of the header (i.e. uninline them) so the
> patch below is only compile tested on x86_64 - I've got to go load a
> trailer and get moving...

I'll give it a whizz on a few architectures, but it looks quite safe
from here.  It looks like the uninlining was desirable from a
size/speed POV anyway.


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