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Date: Wed, 1 Jun 2011 15:16:18 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: =?ISO-8859-1?Q?Am=E9rico?= Wang <xiyou.wangcong@gmail.com>
Cc: linux-cris-kernel@axis.com, LKML <linux-kernel@vger.kernel.org>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Mikael Starvik <starvik@axis.com>,
        Jesper Nilsson <jesper.nilsson@axis.com>
Subject: Re: [Patch] cris: add missing declaration of kgdb_init() and
 breakpoint()
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On Sun, 22 May 2011 22:42:56 +0800
Am__rico Wang <xiyou.wangcong@gmail.com> wrote:

> --- a/arch/cris/arch-v10/kernel/irq.c
> +++ b/arch/cris/arch-v10/kernel/irq.c
> @@ -20,6 +20,9 @@
>  #define crisv10_mask_irq(irq_nr) (*R_VECT_MASK_CLR = 1 << (irq_nr));
>  #define crisv10_unmask_irq(irq_nr) (*R_VECT_MASK_SET = 1 << (irq_nr));
>  
> +extern void kgdb_init(void);
> +extern void breakpoint(void);

They should be declared in a header file, please. 
arch/cris/arch-v32/kernel/irq.c has a private declaration of
kgdb_init(), too.