linux-kernel - Re: [Patch] uml: fix one compile error

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Message-Id: <20081016161557.af935f49.akpm@linux-foundation.org>
Date:	Thu, 16 Oct 2008 16:15:57 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Américo Wang <xiyou.wangcong@...il.com>
Cc:	linux-kernel@...r.kernel.org, jdike@...toit.com, stable@...nel.org
Subject: Re: [Patch] uml: fix one compile error

On Thu, 16 Oct 2008 16:26:26 +0100
Am__rico Wang <xiyou.wangcong@...il.com> wrote:

> 
> This patch fixed the following compile error:
> 
>   CC      arch/um/sys-i386/signal.o
>   /home/wangcong/Projects/linux-2.6/arch/um/sys-i386/signal.c: In
> function 'copy_sc_from_user':
> /home/wangcong/Projects/linux-2.6/arch/um/sys-i386/signal.c:182:
> warning: dereferencing 'void *' pointer
> /home/wangcong/Projects/linux-2.6/arch/um/sys-i386/signal.c:182:
> error: request for member '_fxsr_env' in something not a structure or
> union
> 
> 
> Signed-off-by: WANG Cong <wangcong@...ux.org>
> Cc: jdike@...toit.com
> 
> ---
> diff --git a/arch/um/sys-i386/signal.c b/arch/um/sys-i386/signal.c
> index fd0c25a..1296473 100644
> --- a/arch/um/sys-i386/signal.c
> +++ b/arch/um/sys-i386/signal.c
> @@ -179,7 +179,8 @@ static int copy_sc_from_user(struct pt_regs *regs,
>  	if (have_fpx_regs) {
>  		struct user_fxsr_struct fpx;
>  
> -		err = copy_from_user(&fpx, &sc.fpstate->_fxsr_env[0],
> +		err = copy_from_user(&fpx,
> +			&((struct _fpstate __user *)sc.fpstate)->_fxsr_env[0],
>  				     sizeof(struct user_fxsr_struct));
>  		if (err)
>  			return 1;

Which kernel versions are affected by this error? 2.6.27?

Thanks.
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