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

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Date:	Fri, 17 Oct 2008 13:20:32 +0100
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Américo Wang <xiyou.wangcong@...il.com>,
	linux-kernel@...r.kernel.org, jdike@...toit.com, stable@...nel.org
Subject: Re: [Patch] uml: fix one compile error

On Thu, Oct 16, 2008 at 04:15:57PM -0700, Andrew Morton wrote:
>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?

I haven't tried a stable version, but I will. :)


-- 
"Sometimes the only way to stay sane is to go a little crazy."

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