linux-kernel - Re: mmotm 2009-01-28-02-17 uploaded (i386 build errors: cpusets & kexec)

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Message-ID: <20090129120935.GB9221@hmsreliant.think-freely.org>
Date:	Thu, 29 Jan 2009 07:09:35 -0500
From:	Neil Horman <nhorman@...driver.com>
To:	Simon Horman <horms@...ge.net.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	linux-kernel@...r.kernel.org, Miao Xie <miaox@...fujitsu.com>,
	Vivek Goyal <vgoyal@...hat.com>
Subject: Re: mmotm 2009-01-28-02-17 uploaded (i386 build errors: cpusets &
	kexec)

On Thu, Jan 29, 2009 at 11:28:50AM +0900, Simon Horman wrote:
> On Wed, Jan 28, 2009 at 04:30:40PM -0800, Andrew Morton wrote:
> > On Wed, 28 Jan 2009 08:56:31 -0800
> > Randy Dunlap <randy.dunlap@...cle.com> wrote:
> > 
> > > akpm@...ux-foundation.org wrote:
> > > > The mm-of-the-moment snapshot 2009-01-28-02-17 has been uploaded to
> > > > 
> > > >    http://userweb.kernel.org/~akpm/mmotm/
> > > > 
> > > > and will soon be available at
> > > > 
> > > >    git://git.zen-sources.org/zen/mmotm.git
> > > 
> > > 
> > > 10 randconfigs on i386, 1 good build.
> > > 
> > > The other 9 ended with either of these build errors:
> > > 
> 
> [snip]
> 
> > So does that.
> > 
> > --- a/kernel/printk.c~kexec-add-dmesg-log-symbols-to-proc-vmcoreinfo-lists-fix-fix
> > +++ a/kernel/printk.c
> > @@ -137,11 +137,13 @@ static char *log_buf = __log_buf;
> >  static int log_buf_len = __LOG_BUF_LEN;
> >  static unsigned logged_chars; /* Number of chars produced since last read+clear operation */
> >  
> > +#ifdef CONFIG_KEXEC
> >  void log_buf_kexec_setup(void)
> >  {
> >  	VMCOREINFO_SYMBOL(log_buf);
> >  	VMCOREINFO_SYMBOL(log_end);
> >  }
> > +#endif
> >  
> >  static int __init log_buf_len_setup(char *str)
> >  {
> > _
> 
> Weird, I thought I checked that just now. In any case this email
> was already in my inbox. In any case, I can now produce the problem,
> and this patch resolves it.
> 

Sorry, i didn't think to check on conditions when CONFIG_KEXEC wasn't set.  I
assumed we had a stub for all the VMCOREINFO defines.  Why don't we fix it in
that manner?  I mean we have serveral arch specific additions to vmcoreinfo, all
of which apparently must be ifdefd for this to work.  Why not just fix it in
conditional definition?

Neil

> -- 
> Simon Horman
>   VA Linux Systems Japan K.K., Sydney, Australia Satellite Office
>   H: www.vergenet.net/~horms/             W: www.valinux.co.jp/en
> 
> 
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