On Thu, Sep 2, 2021 at 4:27 AM Chunyan Zhang <zhang.lyra@xxxxxxxxx> wrote:
>
> From: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>
>
> If CONFIG_OF is selected, but CONFIG_OF_ADDRESS is not, when compiling
> files (sunch as timer_of.c) in which the function of_iomap() is invoked,
> compiler would report 'undefined reference to of_iomap', the same case
> is for of_address_to_resource().
What arch and config are you building?
> This patch also makes sure that of_iomap() and of_address_to_resource()
> are declared for sparc so that sparc can have its specific
> implementations in arch/sparc/kernel/of_device_common.c, even if
> including include/linux/of_address.h in it.
>
> Signed-off-by: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>
> ---
> include/linux/of_address.h | 33 +++++++++++++++++----------------
> 1 file changed, 17 insertions(+), 16 deletions(-)
>
> diff --git a/include/linux/of_address.h b/include/linux/of_address.h
> index 45598dbec269..02a719d58466 100644
> --- a/include/linux/of_address.h
> +++ b/include/linux/of_address.h
> @@ -80,6 +80,23 @@ static inline u64 of_translate_address(struct device_node *np,
> return OF_BAD_ADDR;
> }
>
> +#ifdef CONFIG_SPARC
> +extern int of_address_to_resource(struct device_node *dev, int index,
> + struct resource *r);
> +void __iomem *of_iomap(struct device_node *device, int index);
This is now in the !CONFIG_OF_ADDRESS section. So for
CONFIG_OF_ADDRESS, we'd never have a function declaration.
This change does not look right at all to me.
> +#else
> +static inline int of_address_to_resource(struct device_node *dev, int index,
> + struct resource *r)
> +{
> + return -EINVAL;
> +}
> +
> +static inline void __iomem *of_iomap(struct device_node *device, int index)
> +{
> + return NULL;
> +}
> +#endif
> +
> static inline const __be32 *__of_get_address(struct device_node *dev, int index, int bar_no,
> u64 *size, unsigned int *flags)
> {
> @@ -124,22 +141,6 @@ static inline bool of_dma_is_coherent(struct device_node *np)
> }
> #endif /* CONFIG_OF_ADDRESS */
>
> -#ifdef CONFIG_OF
> -extern int of_address_to_resource(struct device_node *dev, int index,
> - struct resource *r);
> -void __iomem *of_iomap(struct device_node *node, int index);
> -#else
> -static inline int of_address_to_resource(struct device_node *dev, int index,
> - struct resource *r)
> -{
> - return -EINVAL;
> -}
> -
> -static inline void __iomem *of_iomap(struct device_node *device, int index)
> -{
> - return NULL;
> -}
> -#endif
> #define of_range_parser_init of_pci_range_parser_init
>
> static inline const __be32 *of_get_address(struct device_node *dev, int index,
> --
> 2.25.1
>
