Re: [PATCH] block: pmem: Add dependency on HAS_IOMEM

[Ross Zwisler <ross.zwisler@linux.intel.com>]

On Mon, 2015-05-04 at 20:58 +0200, Richard Weinberger wrote:
> Not all architectures have io memory.
> 
> Fixes:
> drivers/block/pmem.c: In function ‘pmem_alloc’:
> drivers/block/pmem.c:146:2: error: implicit declaration of function ‘ioremap_nocache’ [-Werror=implicit-function-declaration]
>   pmem->virt_addr = ioremap_nocache(pmem->phys_addr, pmem->size);
>   ^
> drivers/block/pmem.c:146:18: warning: assignment makes pointer from integer without a cast [enabled by default]
>   pmem->virt_addr = ioremap_nocache(pmem->phys_addr, pmem->size);
>                   ^
> drivers/block/pmem.c:182:2: error: implicit declaration of function ‘iounmap’ [-Werror=implicit-function-declaration]
>   iounmap(pmem->virt_addr);
>   ^
> 
> Signed-off-by: Richard Weinberger <richard@nod.at>
> ---
>  drivers/block/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
> index eb1fed5..3ccef9e 100644
> --- a/drivers/block/Kconfig
> +++ b/drivers/block/Kconfig
> @@ -406,6 +406,7 @@ config BLK_DEV_RAM_DAX
>  
>  config BLK_DEV_PMEM
>  	tristate "Persistent memory block device support"
> +	depends on HAS_IOMEM
>  	help
>  	  Saying Y here will allow you to use a contiguous range of reserved
>  	  memory as one or more persistent block devices.

Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>