From: Borislav Petkov <[email protected]>

gcc complains on 32-bit like this:

  drivers/gpu/drm/i915/intel_display.c: In function ‘intel_plane_obj_offset’:
  drivers/gpu/drm/i915/intel_display.c:2954:11: warning: cast to pointer from \
          integer of different size [-Wint-to-pointer-cast]
    offset = (unsigned char *)vma->node.start;
             ^

because vma->node.start is u64 but a pointer on 32-bit is 4 bytes.

Do the calculations with an unsigned long directly and save us the
casts.

Cc: Daniel Vetter <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: David Airlie <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Borislav Petkov <[email protected]>
---
 drivers/gpu/drm/i915/intel_display.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 62211abe4922..640cb7c9b7f3 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2941,7 +2941,7 @@ unsigned long intel_plane_obj_offset(struct intel_plane 
*intel_plane,
 {
        const struct i915_ggtt_view *view = &i915_ggtt_view_normal;
        struct i915_vma *vma;
-       unsigned char *offset;
+       unsigned long offset;
 
        if (intel_rotation_90_or_270(intel_plane->base.state->rotation))
                view = &i915_ggtt_view_rotated;
@@ -2951,14 +2951,14 @@ unsigned long intel_plane_obj_offset(struct intel_plane 
*intel_plane,
                view->type))
                return -1;
 
-       offset = (unsigned char *)vma->node.start;
+       offset = vma->node.start;
 
        if (plane == 1) {
                offset += vma->ggtt_view.rotation_info.uv_start_page *
                          PAGE_SIZE;
        }
 
-       return (unsigned long)offset;
+       return offset;
 }
 
 static void skl_detach_scaler(struct intel_crtc *intel_crtc, int id)
-- 
2.3.5

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