Re: [PATCH] mtd: rawnand: atmel: Add dependency on GENERIC_ALLOCATOR

[Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxx>]

Hello,

On Sat, 11 Aug 2018 12:40:22 +0200, Boris Brezillon wrote:
> The driver uses genalloc functions. Add a dependency on
> GENERIC_ALLOCATOR to prevent build errors when selected through
> COMPILE_TEST.
> 
> Fixes: 88a40e7dca00 ("mtd: rawnand: atmel: Allow selection of this driver when COMPILE_TEST=y")
> Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>
> ---
>  drivers/mtd/nand/raw/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
> index b6738ece16f1..0c3cc3e8e144 100644
> --- a/drivers/mtd/nand/raw/Kconfig
> +++ b/drivers/mtd/nand/raw/Kconfig
> @@ -278,7 +278,7 @@ config MTD_NAND_CS553X
>  config MTD_NAND_ATMEL
>  	tristate "Support for NAND Flash / SmartMedia on AT91"
>  	depends on ARCH_AT91 || COMPILE_TEST
> -	depends on HAS_IOMEM
> +	depends on HAS_IOMEM && GENERIC_ALLOCATOR

I think this kind of dependency should use a "select".

$ git grep "select.*GENERIC_ALLOCATOR" | wc -l
28
$ git grep "depends.*GENERIC_ALLOCATOR" | wc -l
1

It makes sense as it is a kind of "library" of functions, there's no
reason for the user to be aware of this dependency. HAS_IOMEM is
different, because it's a property of the architecture/platform.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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