linux-kernel - Re: [PATCH] soc: litex: Properly depend on HAS

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Message-ID: <20210127122712.GU2002709@lianli.shorne-pla.net>
Date:   Wed, 27 Jan 2021 21:27:12 +0900
From:   Stafford Horne <shorne@...il.com>
To:     David Gow <davidgow@...gle.com>
Cc:     Pawel Czarnecki <pczarnecki@...ernships.antmicro.com>,
        Mateusz Holenko <mholenko@...micro.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] soc: litex: Properly depend on HAS_IOMEM

On Tue, Jan 26, 2021 at 07:36:04PM -0800, David Gow wrote:
> The LiteX SOC controller driver makes use of IOMEM functions like
> devm_platform_ioremap_resource(), which are only available if
> CONFIG_HAS_IOMEM is defined.
> 
> This causes the driver not to be enable under make ARCH=um allyesconfig,
> even though it won't build.

Is this wording correct?  I suspect it causes to driver TO BE enabled.

> 
> By adding a dependency on HAS_IOMEM, the driver will not be enabled on
> architectures which don't support it.
> 
> Fixes: 22447a99c97e ("drivers/soc/litex: add LiteX SoC Controller driver")
> Signed-off-by: David Gow <davidgow@...gle.com>a

This looks ok to me.  I can queue it for 5.11 fixes, if you can help with the
wording above.

-Stafford

> ---
>  drivers/soc/litex/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/soc/litex/Kconfig b/drivers/soc/litex/Kconfig
> index 7c6b009b6f6c..7a7c38282e11 100644
> --- a/drivers/soc/litex/Kconfig
> +++ b/drivers/soc/litex/Kconfig
> @@ -8,6 +8,7 @@ config LITEX
>  config LITEX_SOC_CONTROLLER
>  	tristate "Enable LiteX SoC Controller driver"
>  	depends on OF || COMPILE_TEST
> +	depends on HAS_IOMEM
>  	select LITEX
>  	help
>  	  This option enables the SoC Controller Driver which verifies
> -- 
> 2.30.0.280.ga3ce27912f-goog
>