i915_reg_read_ioctl 2847 drivers/gpu/drm/i915/i915_drv.c 	DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_RENDER_ALLOW),
i915_reg_read_ioctl 2431 drivers/gpu/drm/i915/i915_drv.h int i915_reg_read_ioctl(struct drm_device *dev, void *data,