Re: [RHEL5 PATCH 1/2] Fix RAID5 components

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Prarit Bhargava wrote: [Fri Jul 28 2006, 10:24:53AM EDT]
> +config MD_RAID5_IA64
> +	bool "RAID 5 support for IA64"
> +	depends on MD_RAID456 && IA64
> +	default y
> +	---help---
> +	Say "Y" if you plan on using RAID5 in IA64
> +

This looks wrong to me.  If somebody selects CONFIG_RAID456 on ia64
then clearly they're intending to use it on ia64.

One option would be to remove the quoted description ("RAID 5 support
for IA64") then it wouldn't show up in the menu and would be
automatically selected if the conditions were met.  But it's still
adding an arch-specific depend in a generic Kconfig, so I don't think
it's the right answer.

> diff -urNp linux-2.6.17.ia64.orig/arch/ia64/kernel/ia64_ksyms.c linux-2.6.17.ia64/arch/ia64/kernel/ia64_ksyms.c
> --- linux-2.6.17.ia64.orig/arch/ia64/kernel/ia64_ksyms.c	2006-07-27 09:20:01.000000000 -0400
> +++ linux-2.6.17.ia64/arch/ia64/kernel/ia64_ksyms.c	2006-07-27 14:51:42.000000000 -0400
> @@ -67,7 +68,7 @@ EXPORT_SYMBOL(__udivdi3);
>  EXPORT_SYMBOL(__moddi3);
>  EXPORT_SYMBOL(__umoddi3);
>  
> -#if defined(CONFIG_MD_RAID5) || defined(CONFIG_MD_RAID5_MODULE)
> +#ifdef CONFIG_MD_RAID5_IA64
>  extern void xor_ia64_2(void);
>  extern void xor_ia64_3(void);
>  extern void xor_ia64_4(void);
> diff -urNp linux-2.6.17.ia64.orig/arch/ia64/lib/Makefile linux-2.6.17.ia64/arch/ia64/lib/Makefile
> --- linux-2.6.17.ia64.orig/arch/ia64/lib/Makefile	2006-07-27 09:20:01.000000000 -0400
> +++ linux-2.6.17.ia64/arch/ia64/lib/Makefile	2006-07-27 14:51:19.000000000 -0400
> @@ -14,7 +14,7 @@ lib-y := __divsi3.o __udivsi3.o __modsi3
>  lib-$(CONFIG_ITANIUM)	+= copy_page.o copy_user.o memcpy.o
>  lib-$(CONFIG_MCKINLEY)	+= copy_page_mck.o memcpy_mck.o
>  lib-$(CONFIG_PERFMON)	+= carta_random.o
> -lib-$(CONFIG_MD_RAID5)	+= xor.o
> +lib-$(CONFIG_MD_RAID5_IA64)	+= xor.o
>  
>  AFLAGS___divdi3.o	=
>  AFLAGS___udivdi3.o	= -DUNSIGNED

This looks wrong too.  Since this is in arch/ia64, there's should be
no need to have an arch-specific lib-$(CONFIG_MD_RAID5_IA64), the old
invocation should work fine.

Could you explain what is wrong presently so we can find the right
solution?

Thanks,
Aron

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