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From:   Daniel Vetter <daniel@ffwll.ch>
Date:   Mon, 18 Jun 2018 18:00:11 +0200
Message-ID: <CAKMK7uGPSJs2CN-RtKS51sHd5doTXYJrpJcLuhPfJF8g4zCQ+g@mail.gmail.com>
Subject: Re: [PATCH] gpu: drm: vgem: Change return type to vm_fault_t
To:     Souptick Joarder <jrdr.linux@gmail.com>
Cc:     Sean Paul <seanpaul@chromium.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Matthew Wilcox <willy@infradead.org>,
        dri-devel <dri-devel@lists.freedesktop.org>
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On Mon, Jun 18, 2018 at 1:26 PM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
> On Thu, May 24, 2018 at 6:27 PM, Daniel Vetter <daniel@ffwll.ch> wrote:
>> On Wed, May 23, 2018 at 03:05:35PM +0530, Souptick Joarder wrote:
>>> On Mon, May 14, 2018 at 9:56 PM, Daniel Vetter <daniel@ffwll.ch> wrote:
>>> > On Thu, May 10, 2018 at 02:51:38PM -0400, Sean Paul wrote:
>>> >> On Thu, May 10, 2018 at 07:58:11PM +0530, Souptick Joarder wrote:
>>> >> > Hi Sean,
>>> >> >
>>> >> > On Mon, Apr 16, 2018 at 8:32 PM, Souptick Joarder <jrdr.linux@gmail.com> wrote:
>>> >> > > Use new return type vm_fault_t for fault handler.
>>> >> > >
>>> >> > > Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
>>> >> > > Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
>>> >> > > ---
>>> >> > >  drivers/gpu/drm/vgem/vgem_drv.c | 5 ++---
>>> >> > >  1 file changed, 2 insertions(+), 3 deletions(-)
>>> >> > >
>>> >> > > diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
>>> >> > > index 2524ff1..c64a859 100644
>>> >> > > --- a/drivers/gpu/drm/vgem/vgem_drv.c
>>> >> > > +++ b/drivers/gpu/drm/vgem/vgem_drv.c
>>> >> > > @@ -61,13 +61,13 @@ static void vgem_gem_free_object(struct drm_gem_object *obj)
>>> >> > >         kfree(vgem_obj);
>>> >> > >  }
>>> >> > >
>>> >> > > -static int vgem_gem_fault(struct vm_fault *vmf)
>>> >> > > +static vm_fault_t vgem_gem_fault(struct vm_fault *vmf)
>>> >> > >  {
>>> >> > >         struct vm_area_struct *vma = vmf->vma;
>>> >> > >         struct drm_vgem_gem_object *obj = vma->vm_private_data;
>>> >> > >         /* We don't use vmf->pgoff since that has the fake offset */
>>> >> > >         unsigned long vaddr = vmf->address;
>>> >> > > -       int ret;
>>> >> > > +       vm_fault_t ret = VM_FAULT_SIGBUS;
>>> >> > >         loff_t num_pages;
>>> >> > >         pgoff_t page_offset;
>>> >> > >         page_offset = (vaddr - vma->vm_start) >> PAGE_SHIFT;
>>> >> > > @@ -77,7 +77,6 @@ static int vgem_gem_fault(struct vm_fault *vmf)
>>> >> > >         if (page_offset > num_pages)
>>> >> > >                 return VM_FAULT_SIGBUS;
>>> >> > >
>>> >> > > -       ret = -ENOENT;
>>> >> > >         mutex_lock(&obj->pages_lock);
>>> >> > >         if (obj->pages) {
>>> >> > >                 get_page(obj->pages[page_offset]);
>>> >> > > --
>>> >> > > 1.9.1
>>> >> > >
>>> >> >
>>> >> > Any further comment on this patch ?
>>> >>
>>> >> Patch looks good to me. My build test fails, though, since vm_fault_t doesn't
>>> >> exist in drm-misc-next yet.
>>> >
>>> > vm_fault_t is already in upstream, just needs Maarten to do a backmerge.
>>> > Which I think he's done by now ... Otherwise nag him more :-)
>>> > -Daniel
>>> >
>>> >>
>>> >> So, for now,
>>> >>
>>> >> Reviewed-by: Sean Paul <seanpaul@chromium.org>
>>> >>
>>> >>
>>> >> --
>>> >> Sean Paul, Software Engineer, Google / Chromium OS
>>> >> _______________________________________________
>>> >> dri-devel mailing list
>>> >> dri-devel@lists.freedesktop.org
>>> >> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>>> >
>>> > --
>>> > Daniel Vetter
>>> > Software Engineer, Intel Corporation
>>> > http://blog.ffwll.ch
>>>
>>> Daniel/ Sean, is this patch already merged for 4.18 ?
>>
>> Nope, fell through the cracks. Thanks for the reminder, queued for 4.18
>> now.
>> -Daniel
>>
>
> Daniel, This patch is not available in 4.18-rc-1 :-)

I mixed up my book-keeping, it was queued for 4.19. Should show up in
linux-next any day (well as soon as drm-misc maintainers get their
book-keeping updated).
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch