linux-kernel - Re: [PATCH] drm/nouveau: Fix DEVICE

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Date:   Wed, 17 Apr 2019 10:38:41 -0400
From:   Jerome Glisse <jglisse@...hat.com>
To:     Yue Haibing <yuehaibing@...wei.com>
Cc:     bskeggs@...hat.com, airlied@...ux.ie, daniel@...ll.ch,
        jgg@...lanox.com, rcampbell@...dia.com, leonro@...lanox.com,
        akpm@...ux-foundation.org, sfr@...b.auug.org.au,
        linux-kernel@...r.kernel.org, nouveau@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-mm@...ck.org
Subject: Re: [PATCH] drm/nouveau: Fix DEVICE_PRIVATE dependencies

On Wed, Apr 17, 2019 at 10:26:32PM +0800, Yue Haibing wrote:
> From: YueHaibing <yuehaibing@...wei.com>
> 
> During randconfig builds, I occasionally run into an invalid configuration
> 
> WARNING: unmet direct dependencies detected for DEVICE_PRIVATE
>   Depends on [n]: ARCH_HAS_HMM_DEVICE [=n] && ZONE_DEVICE [=n]
>   Selected by [y]:
>   - DRM_NOUVEAU_SVM [=y] && HAS_IOMEM [=y] && ARCH_HAS_HMM [=y] && DRM_NOUVEAU [=y] && STAGING [=y]
> 
> mm/memory.o: In function `do_swap_page':
> memory.c:(.text+0x2754): undefined reference to `device_private_entry_fault'
> 
> commit 5da25090ab04 ("mm/hmm: kconfig split HMM address space mirroring from device memory")
> split CONFIG_DEVICE_PRIVATE dependencies from
> ARCH_HAS_HMM to ARCH_HAS_HMM_DEVICE and ZONE_DEVICE,
> so enable DRM_NOUVEAU_SVM will trigger this warning,
> cause building failed.
> 
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Fixes: 5da25090ab04 ("mm/hmm: kconfig split HMM address space mirroring from device memory")
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>

Reviewed-by: Jérôme Glisse <jglisse@...hat.com>

> ---
>  drivers/gpu/drm/nouveau/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
> index 00cd9ab..99e30c1 100644
> --- a/drivers/gpu/drm/nouveau/Kconfig
> +++ b/drivers/gpu/drm/nouveau/Kconfig
> @@ -74,7 +74,8 @@ config DRM_NOUVEAU_BACKLIGHT
>  
>  config DRM_NOUVEAU_SVM
>  	bool "(EXPERIMENTAL) Enable SVM (Shared Virtual Memory) support"
> -	depends on ARCH_HAS_HMM
> +	depends on ARCH_HAS_HMM_DEVICE
> +	depends on ZONE_DEVICE
>  	depends on DRM_NOUVEAU
>  	depends on STAGING
>  	select HMM_MIRROR
> -- 
> 2.7.4
> 
>