linux-kernel - Re: [PATCH] gpu: drm: drm_vm: Adding new typedef vm_fault

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Date:   Wed, 16 May 2018 10:09:28 +0530
From:   Souptick Joarder <jrdr.linux@...il.com>
To:     daniel.vetter@...el.com, Gustavo Padovan <gustavo@...ovan.org>,
        Sean Paul <seanpaul@...omium.org>, airlied@...ux.ie
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Matthew Wilcox <willy@...radead.org>
Subject: Re: [PATCH] gpu: drm: drm_vm: Adding new typedef vm_fault_t

On Thu, May 10, 2018 at 7:12 PM, Souptick Joarder <jrdr.linux@...il.com> wrote:
> Use new return type vm_fault_t for fault handler. For
> now, this is just documenting that the function returns
> a VM_FAULT value rather than an errno. Once all instances
> are converted, vm_fault_t will become a distinct type.
>
> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
>
> Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
> Reviewed-by: Matthew Wilcox <mawilcox@...rosoft.com>
> ---
>  drivers/gpu/drm/drm_vm.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
> index 2660543..c330104 100644
> --- a/drivers/gpu/drm/drm_vm.c
> +++ b/drivers/gpu/drm/drm_vm.c
> @@ -100,7 +100,7 @@ static pgprot_t drm_dma_prot(uint32_t map_type, struct vm_area_struct *vma)
>   * map, get the page, increment the use count and return it.
>   */
>  #if IS_ENABLED(CONFIG_AGP)
> -static int drm_vm_fault(struct vm_fault *vmf)
> +static vm_fault_t drm_vm_fault(struct vm_fault *vmf)
>  {
>         struct vm_area_struct *vma = vmf->vma;
>         struct drm_file *priv = vma->vm_file->private_data;
> @@ -173,7 +173,7 @@ static int drm_vm_fault(struct vm_fault *vmf)
>         return VM_FAULT_SIGBUS; /* Disallow mremap */
>  }
>  #else
> -static int drm_vm_fault(struct vm_fault *vmf)
> +static vm_fault_t drm_vm_fault(struct vm_fault *vmf)
>  {
>         return VM_FAULT_SIGBUS;
>  }
> @@ -189,7 +189,7 @@ static int drm_vm_fault(struct vm_fault *vmf)
>   * Get the mapping, find the real physical page to map, get the page, and
>   * return it.
>   */
> -static int drm_vm_shm_fault(struct vm_fault *vmf)
> +static vm_fault_t drm_vm_shm_fault(struct vm_fault *vmf)
>  {
>         struct vm_area_struct *vma = vmf->vma;
>         struct drm_local_map *map = vma->vm_private_data;
> @@ -291,7 +291,7 @@ static void drm_vm_shm_close(struct vm_area_struct *vma)
>   *
>   * Determine the page number from the page offset and get it from drm_device_dma::pagelist.
>   */
> -static int drm_vm_dma_fault(struct vm_fault *vmf)
> +static vm_fault_t drm_vm_dma_fault(struct vm_fault *vmf)
>  {
>         struct vm_area_struct *vma = vmf->vma;
>         struct drm_file *priv = vma->vm_file->private_data;
> @@ -326,7 +326,7 @@ static int drm_vm_dma_fault(struct vm_fault *vmf)
>   *
>   * Determine the map offset from the page offset and get it from drm_sg_mem::pagelist.
>   */
> -static int drm_vm_sg_fault(struct vm_fault *vmf)
> +static vm_fault_t drm_vm_sg_fault(struct vm_fault *vmf)
>  {
>         struct vm_area_struct *vma = vmf->vma;
>         struct drm_local_map *map = vma->vm_private_data;
> --
> 1.9.1
>

Daniel, if no further comment, we would like to get this patch
in queue for 4.18.