[PATCH 1/7] ARM: l2x0: add empty l2x0_of_init

[Barry Song]

2011/9/1 Rob Herring <robherring2 at gmail.com>:
> From: Rob Herring <rob.herring at calxeda.com>
>
> Add empty version of l2x0_of_init for when CONFIG_CACHE_L2X0 is not selected.
>
> Signed-off-by: Rob Herring <rob.herring at calxeda.com>

Acked-by: Barry Song <21cnbao at gmail.com>

it seems most people use
"
#ifdef CONFIG_CACHE_L2X0
...
l2x0 related codes
...
#endif
"
or
"
obj-$(CONFIG_CACHE_L2X0) += xxx-l2x0.o
"

to avoid l2x0 related codes compiled and linked into kernel.

but this patch provides another option. it is not bad too.

> ---
>  arch/arm/include/asm/hardware/cache-l2x0.h |    7 +++++++
>  1 files changed, 7 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/include/asm/hardware/cache-l2x0.h b/arch/arm/include/asm/hardware/cache-l2x0.h
> index 4a6004a..967a808 100644
> --- a/arch/arm/include/asm/hardware/cache-l2x0.h
> +++ b/arch/arm/include/asm/hardware/cache-l2x0.h
> @@ -90,7 +90,14 @@
>
>  #ifndef __ASSEMBLY__
>  extern void __init l2x0_init(void __iomem *base, __u32 aux_val, __u32 aux_mask);
> +#if defined(CONFIG_CACHE_L2X0) && defined(CONFIG_OF)
>  extern int l2x0_of_init(__u32 aux_val, __u32 aux_mask);
> +#else
> +static int l2x0_of_init(__u32 aux_val, __u32 aux_mask)
> +{
> +       return -ENODEV;
> +}
>  #endif
> +#endif /* __ASSEMBLY__ */
>
>  #endif
> --
> 1.7.4.1

-barry