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Date:   Thu, 30 May 2019 15:49:27 +0000
From:   Jason Gunthorpe <jgg@...lanox.com>
To:     Yuehaibing <yuehaibing@...wei.com>,
        Jérôme Glisse <jglisse@...hat.com>
CC:     "bskeggs@...hat.com" <bskeggs@...hat.com>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "jglisse@...hat.com" <jglisse@...hat.com>,
        "rcampbell@...dia.com" <rcampbell@...dia.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "b.zolnierkie@...sung.com" <b.zolnierkie@...sung.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>
Subject: Re: [PATCH] drm/nouveau: Fix DEVICE_PRIVATE dependencies


On Thu, May 30, 2019 at 11:31:12PM +0800, Yuehaibing wrote:
> Hi all,
> 
> Friendly ping:
> 
> Who can take this?
> 
> On 2019/4/17 22:26, 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>
> >  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
> > +++ 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
> > 

I'm expecting to take a patch like this into the new hmm git tree once
Jerome sends his Final Solution for the kconfig problems.

Maybe it is this patch, Jerome??

Regards,
Jason 

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