linux-kernel - Re: error: 'cpus_in_crash' defined but not used

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Message-ID: <1327447120.19850.46.camel@pasglop>
Date:	Wed, 25 Jan 2012 10:18:40 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Christian Kujau <lists@...dbynature.de>
Cc:	LKML <linux-kernel@...r.kernel.org>, linuxppc-dev@...ts.ozlabs.org
Subject: Re: error: 'cpus_in_crash' defined but not used

On Fri, 2012-01-20 at 16:45 -0800, Christian Kujau wrote:
> > On Tue, 17 Jan 2012 at 20:13, Christian Kujau wrote:
> > > 
> > > compiling today's git (mainline, a25a2b8) on powerpc32 gives:
> > > 
> > >   CC      arch/powerpc/kernel/crash.o
> > > cc1: warnings being treated as errors
> > > /usr/local/src/linux-2.6-git/arch/powerpc/kernel/crash.c:49: error: 
> > > ‘cpus_in_crash’ defined but not used
> > > make[2]: *** [arch/powerpc/kernel/crash.o] Error 1
> > > make[1]: *** [arch/powerpc/kernel] Error 2
> > > make: *** [sub-make] Error 2
> 
> This still happens in 3.3.0-rc1 and is fixed by the patch below.
> 
> .config is here: http://nerdbynature.de/bits/3.2.0/
> 
> Thoughts?

Applying now, thanks.

Cheers,
Ben.

> Thanks,
> Christian.
> 
> > I could not find cpus_in_crash anywhere in the sourcetree, except for 
> > arch/powerpc/kernel/crash.c. Moving the definition into the CONFIG_SMP 
> > ifdef helps on my UP system, of course - not sure about other machines 
> > though:
> > 
> > diff --git a/arch/powerpc/kernel/crash.c b/arch/powerpc/kernel/crash.c
> > index 28be345..abef751 100644
> > --- a/arch/powerpc/kernel/crash.c
> > +++ b/arch/powerpc/kernel/crash.c
> > @@ -46,7 +46,6 @@
> >  
> >  /* This keeps a track of which one is the crashing cpu. */
> >  int crashing_cpu = -1;
> > -static atomic_t cpus_in_crash;
> >  static int time_to_dump;
> >  
> >  #define CRASH_HANDLER_MAX 3
> > @@ -66,6 +65,7 @@ static int handle_fault(struct pt_regs *regs)
> >  
> >  #ifdef CONFIG_SMP
> >  
> > +static atomic_t cpus_in_crash;
> >  void crash_ipi_callback(struct pt_regs *regs)
> >  {
> >  	static cpumask_t cpus_state_saved = CPU_MASK_NONE;
> > 
> > 
> > Christian.
> > -- 
> > BOFH excuse #272:
> > 
> > Netscape has crashed
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@...r.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at  http://www.tux.org/lkml/
> > 
> 


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