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>

1 files changed, 0 insertions, 2 deletions

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;
 }