linux-kernel - Re: [PATCH v2] of/address: sparc: Declare of_address_to_resource() as an extern function for sparc again

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Date:	Mon, 05 Nov 2012 10:12:10 -0600
From:	Rob Herring <rob.herring@...xeda.com>
To:	Andreas Larsson <andreas@...sler.com>
CC:	davem@...emloft.net, sam@...nborg.org, sparclinux@...r.kernel.org,
	software@...sler.com, Grant Likely <grant.likely@...retlab.ca>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] of/address: sparc: Declare of_address_to_resource()
 as an extern function for sparc again

On 11/05/2012 04:53 AM, Andreas Larsson wrote:
> This bug-fix makes sure that of_address_to_resource is defined extern for sparc
> so that the sparc-specific implementation of of_address_to_resource() is once
> again used when including include/linux/of_address.h in a sparc context. A
> number of drivers in mainline relies on this function working for sparc.
> 
> The bug was introduced in a850a7554442f08d3e910c6eeb4ee216868dda1e, "of/address:
> add empty static inlines for !CONFIG_OF". Contrary to that commit title, the
> static inlines are added for !CONFIG_OF_ADRESS, and CONFIG_OF_ADRESS is never

s/ADRESS/ADDRESS/

> defined for sparc. This is good behavior for the other functions in
> include/linux/of_address.h, as the extern functions defined in
> drivers/of/address.c only gets linked when OF_ADDRESS is configured. However,
> for of_address_to_resource is that there exists a sparc-specific implementation
> in arch/sparc/arch/sparc/kernel/of_device_common.c
> 
> Signed-off-by: Andreas Larsson <andreas@...sler.com>

Otherwise,

Acked-by: Rob Herring <rob.herring@...xeda.com>

> ---
>  arch/sparc/include/asm/prom.h |    5 +++++
>  include/linux/of_address.h    |    2 ++
>  2 files changed, 7 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/sparc/include/asm/prom.h b/arch/sparc/include/asm/prom.h
> index c287651..f930031 100644
> --- a/arch/sparc/include/asm/prom.h
> +++ b/arch/sparc/include/asm/prom.h
> @@ -63,5 +63,10 @@ extern char *of_console_options;
>  extern void irq_trans_init(struct device_node *dp);
>  extern char *build_path_component(struct device_node *dp);
>  
> +/* SPARC has a local implementation */
> +extern int of_address_to_resource(struct device_node *dev, int index,
> +				  struct resource *r);
> +#define of_address_to_resource of_address_to_resource
> +
>  #endif /* __KERNEL__ */
>  #endif /* _SPARC_PROM_H */
> diff --git a/include/linux/of_address.h b/include/linux/of_address.h
> index a1984dd..e20e3af 100644
> --- a/include/linux/of_address.h
> +++ b/include/linux/of_address.h
> @@ -28,11 +28,13 @@ static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
>  #endif
>  
>  #else /* CONFIG_OF_ADDRESS */
> +#ifndef of_address_to_resource
>  static inline int of_address_to_resource(struct device_node *dev, int index,
>  					 struct resource *r)
>  {
>  	return -EINVAL;
>  }
> +#endif
>  static inline struct device_node *of_find_matching_node_by_address(
>  					struct device_node *from,
>  					const struct of_device_id *matches,
> 
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