linux-kernel - Re: [PATCH v2] gpu: drm: virtio: code cleanup

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Date:   Mon, 30 Jul 2018 10:16:45 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     airlied@...ux.ie, Gerd Hoffmann <kraxel@...hat.com>
Cc:     dri-devel@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org,
        SUMAN TRIPATHI <svptas.linux@...il.com>,
        Ajit Linux <ajitn.linux@...il.com>,
        Brajeswar Ghosh <brajeswar.linux@...il.com>,
        Sabyasachi Gupta <sabyasachi.linux@...il.com>,
        Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH v2] gpu: drm: virtio: code cleanup

On Tue, Jul 24, 2018 at 11:33 AM, Souptick Joarder <jrdr.linux@...il.com> wrote:
> On Tue, Jul 17, 2018 at 5:04 PM, Souptick Joarder <jrdr.linux@...il.com> wrote:
>> On Tue, Jul 3, 2018 at 9:03 PM, Souptick Joarder <jrdr.linux@...il.com> wrote:
>>> The fault handler code is commented since v4.2.
>>> If there is no plan to enable the fault handler
>>> code in future, we can remove this dead code.
>>>
>>> Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
>>> ---
>>> v2: corrected subject line
>>>
>>
>> Any further comment on this patch ?
>
> If no further comment, can we get this patch in queue for 4.19 ?
>

Gerd, can we get this patch in queue for 4.19 ?

>>
>>>  drivers/gpu/drm/virtio/virtgpu_ttm.c | 36 +-----------------------------------
>>>  1 file changed, 1 insertion(+), 35 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/virtio/virtgpu_ttm.c b/drivers/gpu/drm/virtio/virtgpu_ttm.c
>>> index 11f8ae5..b6f021c 100644
>>> --- a/drivers/gpu/drm/virtio/virtgpu_ttm.c
>>> +++ b/drivers/gpu/drm/virtio/virtgpu_ttm.c
>>> @@ -106,29 +106,6 @@ static void virtio_gpu_ttm_global_fini(struct virtio_gpu_device *vgdev)
>>>         }
>>>  }
>>>
>>> -#if 0
>>> -/*
>>> - * Hmm, seems to not do anything useful.  Leftover debug hack?
>>> - * Something like printing pagefaults to kernel log?
>>> - */
>>> -static struct vm_operations_struct virtio_gpu_ttm_vm_ops;
>>> -static const struct vm_operations_struct *ttm_vm_ops;
>>> -
>>> -static int virtio_gpu_ttm_fault(struct vm_fault *vmf)
>>> -{
>>> -       struct ttm_buffer_object *bo;
>>> -       struct virtio_gpu_device *vgdev;
>>> -       int r;
>>> -
>>> -       bo = (struct ttm_buffer_object *)vmf->vma->vm_private_data;
>>> -       if (bo == NULL)
>>> -               return VM_FAULT_NOPAGE;
>>> -       vgdev = virtio_gpu_get_vgdev(bo->bdev);
>>> -       r = ttm_vm_ops->fault(vmf);
>>> -       return r;
>>> -}
>>> -#endif
>>> -
>>>  int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma)
>>>  {
>>>         struct drm_file *file_priv;
>>> @@ -143,19 +120,8 @@ int virtio_gpu_mmap(struct file *filp, struct vm_area_struct *vma)
>>>                 return -EINVAL;
>>>         }
>>>         r = ttm_bo_mmap(filp, vma, &vgdev->mman.bdev);
>>> -#if 0
>>> -       if (unlikely(r != 0))
>>> -               return r;
>>> -       if (unlikely(ttm_vm_ops == NULL)) {
>>> -               ttm_vm_ops = vma->vm_ops;
>>> -               virtio_gpu_ttm_vm_ops = *ttm_vm_ops;
>>> -               virtio_gpu_ttm_vm_ops.fault = &virtio_gpu_ttm_fault;
>>> -       }
>>> -       vma->vm_ops = &virtio_gpu_ttm_vm_ops;
>>> -       return 0;
>>> -#else
>>> +
>>>         return r;
>>> -#endif
>>>  }
>>>
>>>  static int virtio_gpu_invalidate_caches(struct ttm_bo_device *bdev,
>>> --
>>> 1.9.1
>>>