linux-kernel - Re: [PATCH 2/2] nouveau: fix dependencies for DEVICE

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Date:   Fri, 8 May 2020 11:05:26 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Arnd Bergmann <arnd@...db.de>, Ben Skeggs <bskeggs@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>
Cc:     Felix Kuehling <Felix.Kuehling@....com>,
        Christoph Hellwig <hch@....de>,
        John Hubbard <jhubbard@...dia.com>,
        Jason Gunthorpe <jgg@...lanox.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Dan Williams <dan.j.williams@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        dri-devel@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] nouveau: fix dependencies for DEVICE_PRIVATE

On 5/8/20 7:40 AM, Arnd Bergmann wrote:
> CONFIG_DEVICE_PRIVATE cannot be selected in configurations
> without ZONE_DEVICE:
> 
> WARNING: unmet direct dependencies detected for DEVICE_PRIVATE
>   Depends on [n]: ZONE_DEVICE [=n]
>   Selected by [y]:
>   - DRM_NOUVEAU_SVM [=y] && HAS_IOMEM [=y] && DRM_NOUVEAU [=y] && MMU [=y] && STAGING [=y]
> kernel/resource.c:1653:28: error: use of undeclared identifier 'PA_SECTION_SHIFT'
>         size = ALIGN(size, 1UL << PA_SECTION_SHIFT);
>                                   ^
> kernel/resource.c:1654:48: error: use of undeclared identifier 'MAX_PHYSMEM_BITS'
> 
> Add a dependency for Nouveau to avoid broken randconfig builds.
> 
> Fixes: d2c63df2242e ("mm/hmm: make CONFIG_DEVICE_PRIVATE into a select")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested

Thanks.

> ---
>  drivers/gpu/drm/nouveau/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
> index af5793f3e7c2..996ec5475908 100644
> --- a/drivers/gpu/drm/nouveau/Kconfig
> +++ b/drivers/gpu/drm/nouveau/Kconfig
> @@ -87,6 +87,7 @@ config DRM_NOUVEAU_BACKLIGHT
>  config DRM_NOUVEAU_SVM
>  	bool "(EXPERIMENTAL) Enable SVM (Shared Virtual Memory) support"
>  	depends on DRM_NOUVEAU
> +	depends on ZONE_DEVICE
>  	depends on MMU
>  	depends on STAGING
>  	select DEVICE_PRIVATE
> 


-- 
~Randy