linux-kernel - Re: [BUILD_FAILURE] 2.6.24-git18 build fails section type conflict psmouse-base

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Date:	Fri, 08 Feb 2008 19:53:10 +0530
From:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
To:	Adrian Bunk <bunk@...nel.org>
CC:	rusty@...tcorp.com.au, LKML <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org, Andy Whitcroft <apw@...dowen.org>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>
Subject: Re: [BUILD_FAILURE] 2.6.24-git18 build fails section type conflict
 psmouse-base

Adrian Bunk wrote:
> On Fri, Feb 08, 2008 at 06:20:52PM +0530, Kamalesh Babulal wrote:
>> Adrian Bunk wrote:
>>> On Fri, Feb 08, 2008 at 04:02:59PM +0530, Kamalesh Babulal wrote:
>>>> Hi,
>>>>
>>>> The 2.6.24-git18 kernel build fails on the power machine with following message
>>>>
>>>> drivers/input/mouse/psmouse-base.c:44: error: __param_proto causes a section type conflict
>>>> drivers/input/mouse/psmouse-base.c:44: error: __param_proto causes a section type conflict
>>>> make[3]: *** [drivers/input/mouse/psmouse-base.o] Error 1
>>>> make[2]: *** [drivers/input/mouse] Error 2
>>>> make[1]: *** [drivers/input] Error 2
>>>> make: *** [drivers] Error 2
>>>>
>>>> this failure was reported earlier http://lkml.org/lkml/2007/9/22/64
>>> You need the patch from [1] manually applied (due to changed context) 
>>> and with " || defined(__powerpc__)" added for getting it compiling.
>>>
>>> @Rusty:
>>> Can you look at this issue? It's a modules problem on 3 architectures.
>>>
>>> cu
>>> Adrian
>>>
>>> [1] http://lkml.org/lkml/2007/12/27/29
>>>
>> I tried manually applying the patch and added ||defined(__powerpc__), the above
>> build failure was resolved but it started failing at another place, 
>>
>>   CC      kernel/printk.o
>> kernel/printk.c:568: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘static’
>> make[1]: *** [kernel/printk.o] Error 1
>> make: *** [kernel] Error 2
> 
> Below is what worked for me (based on Ivan's patch).
> 
> The comment is wrong now, the #if's should refer to kconfig variables, 
> and I don't know whether this patch is really the best solution.
> 
> cu
> Adrian
> 
> 
> 1fffe660ace75bd875fc23f7b2121d7341f08464 diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
> index 8126e55..d17ce12 100644
> --- a/include/linux/moduleparam.h
> +++ b/include/linux/moduleparam.h
> @@ -62,6 +62,15 @@ struct kparam_array
>  	void *elem;
>  };
> 
> +/* On alpha and ia64 relocations to global data cannot go into read-only
> +   sections, so 'const' makes no sense and even causes compile failures
> +   with some compilers. */
> +#if defined(__alpha__) || defined(__ia64__) || defined(__powerpc__)
> +#define __moduleparam_const
> +#else
> +#define __moduleparam_const const
> +#endif
> +
>  /* This is the fundamental function for registering boot/module
>     parameters.  perm sets the visibility in sysfs: 000 means it's
>     not there, read bits mean it's readable, write bits mean it's
> @@ -71,7 +80,7 @@ struct kparam_array
>  	static int __param_perm_check_##name __attribute__((unused)) =	\
>  	BUILD_BUG_ON_ZERO((perm) < 0 || (perm) > 0777 || ((perm) & 2));	\
>  	static const char __param_str_##name[] = prefix #name;		\
> -	static struct kernel_param const __param_##name			\
> +	static struct kernel_param __moduleparam_const __param_##name			\
>  	__used								\
>      __attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \
>  	= { __param_str_##name, perm, set, get, { arg } }
> --
Hi Adrian,

Thanks the patch resolves the problem, I had a typo when applied the manually :-(.

-- 
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
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