drm: drop setting vm_file to filp

Talking to Al Viro on irc, we can see no possible reason for doing
this, the upper mmap code does it. The code has been there since
first import into drm tree I can find.

Al tracked down this as a requirement pre 2.3.51 hasn't been needed since.

Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>

4 files changed, 0 insertions, 5 deletions

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index f8625e290728..3ebe3c8f58b5 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -700,7 +700,6 @@ int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
          */
         drm_gem_object_reference(obj);
 
-        vma->vm_file = filp;    /* Needed for drm_vm_open() */
         drm_vm_open_locked(vma);
 
 out_unlock:
diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index 8c03eaf41448..55cd61567812 100644
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -519,7 +519,6 @@ static int drm_mmap_dma(struct file *filp, struct vm_area_struct *vma)
         vma->vm_flags |= VM_RESERVED;   /* Don't swap */
         vma->vm_flags |= VM_DONTEXPAND;
 
-        vma->vm_file = filp;    /* Needed for drm_vm_open() */
         drm_vm_open_locked(vma);
         return 0;
 }
@@ -671,7 +670,6 @@ int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma)
         vma->vm_flags |= VM_RESERVED;   /* Don't swap */
         vma->vm_flags |= VM_DONTEXPAND;
 
-        vma->vm_file = filp;    /* Needed for drm_vm_open() */
         drm_vm_open_locked(vma);
         return 0;
 }
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 025abb3e3b67..65452512f5b4 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -208,7 +208,6 @@ static int exynos_drm_gem_mmap_buffer(struct file *filp,
 
         /* in case of direct mapping, always having non-cachable attribute */
         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-        vma->vm_file = filp;
 
         vm_size = vma->vm_end - vma->vm_start;
         /*
diff --git a/drivers/gpu/drm/i810/i810_dma.c b/drivers/gpu/drm/i810/i810_dma.c
index 64a989ed5b8f..2c8a60c3b98e 100644
--- a/drivers/gpu/drm/i810/i810_dma.c
+++ b/drivers/gpu/drm/i810/i810_dma.c
@@ -99,7 +99,6 @@ static int i810_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
         buf_priv = buf->dev_private;
 
         vma->vm_flags |= (VM_IO | VM_DONTCOPY);
-        vma->vm_file = filp;
 
         buf_priv->currently_mapped = I810_BUF_MAPPED;