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Date: Tue, 8 Mar 2016 10:21:52 +0100
From: Ingo Molnar <mingo@kernel.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: kbuild test robot <fengguang.wu@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        "kbuild-all@01.org" <kbuild-all@01.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@elte.hu>
Subject: Re: kernel/irq/irqdesc.c:206:2: error: array index in initializer
 exceeds array bounds
Message-ID: <20160308092152.GE12413@gmail.com>
References: <201603081643.6mAzMxzS%fengguang.wu@intel.com>
 <CAMuHMdX4C7UAw9KuAqrCaBUTHCZ=F6MeVr4NfLtSPu0GTCoYEA@mail.gmail.com>
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* Geert Uytterhoeven <geert@linux-m68k.org> wrote:

> On Tue, Mar 8, 2016 at 9:38 AM, kbuild test robot
> <fengguang.wu@intel.com> wrote:
> > FYI, the error/warning still remains.
> >
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head:   e2857b8f11a289ed2b61d18d0665e05c1053c446
> > commit: 3795de236d67a05994a1a12759db9d4dd9ffc42c genirq: Distangle kernel/irq/handle.c
> > date:   5 years ago
> > config: m68k-alldefconfig (attached as .config)
> > reproduce:
> >         wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         git checkout 3795de236d67a05994a1a12759db9d4dd9ffc42c
> >         # save the attached .config to linux build tree
> >         make.cross ARCH=m68k
> >
> > All errors (new ones prefixed by >>):
> >
> >    In file included from include/linux/irqnr.h:10:0,
> >                     from include/linux/irq.h:22,
> >                     from kernel/irq/irqdesc.c:10:
> >    arch/m68k/include/asm/irq.h:25:17: error: expected identifier or '(' before numeric constant
> >     #define NR_IRQS 0
> >                     ^
> >    include/linux/irqnr.h:15:19: note: in expansion of macro 'NR_IRQS'
> >     #define nr_irqs   NR_IRQS
> >                       ^
> >    kernel/irq/irqdesc.c:36:5: note: in expansion of macro 'nr_irqs'
> >     int nr_irqs = NR_IRQS;
> >         ^
> >>> kernel/irq/irqdesc.c:206:2: error: array index in initializer exceeds array bounds
> >      [0 ... NR_IRQS-1] = {
> >      ^
> 
> Same comment as before: thou shall not compile kernels for m68k without
> selecting any platform support.

That should be enforced at the Kconfig level.

Thanks,

	Ingo