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Date: Mon, 9 Jan 2017 09:20:26 +0100
From: Sascha Hauer <s.hauer@pengutronix.de>
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Subject: Re: [PATCH] arm: decalare div0 as weak function
To: DU HUANPENG <opentkernel@163.com>
Cc: barebox@lists.infradead.org, Du Huanpeng <u74147@gmail.com>

Hi,

On Sat, Jan 07, 2017 at 10:45:26PM +0800, DU HUANPENG wrote:
> From: Du Huanpeng <u74147@gmail.com>
> 
> Signed-off-by: Du Huanpeng <u74147@gmail.com>
> ---
>  arch/arm/lib/div0.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/lib/div0.c b/arch/arm/lib/div0.c
> index 852cb72..d4f3b6c 100644
> --- a/arch/arm/lib/div0.c
> +++ b/arch/arm/lib/div0.c
> @@ -17,11 +17,11 @@
>   *
>   */
>  #include <common.h>
> +#include <linux/compiler.h>
>  
>  extern void __div0(void);
>  
> -/* Replacement (=dummy) for GNU/Linux division-by zero handler */
> -void __div0 (void)
> +__weak void __div0 (void)

Could you explain why and in which situations you need this?

Sascha

>  {
>  	panic("division by zero\n");
>  }
> -- 
> 2.7.4
> 
> 
> 
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