To get the offset of the members in PVINFO page, offsetof() looks much
better than the tricky approach in current code.
v7:
- Move "offsetof()" modification into a dedicated patch. (Joonas)
Suggested-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Signed-off-by: Zhi Wang <zhi.a.wang@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_pvinfo.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_pvinfo.h b/drivers/gpu/drm/i915/i915_pvinfo.h
index 68bdf60..7b3cec4 100644
--- a/drivers/gpu/drm/i915/i915_pvinfo.h
+++ b/drivers/gpu/drm/i915/i915_pvinfo.h
@@ -104,7 +104,7 @@ struct vgt_if {
} __packed;
#define vgtif_reg(x) \
- _MMIO((VGT_PVINFO_PAGE + (long)&((struct vgt_if *)NULL)->x))
+ _MMIO((VGT_PVINFO_PAGE + offsetof(struct vgt_if, x)))
/* vGPU display status to be used by the host side */
#define VGT_DRV_DISPLAY_NOT_READY 0
--
1.9.1
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