From: Chris Wilson Date: Sat, 9 Aug 2014 18:18:43 +0000 (+0100) Subject: drm/i915: Agnostic INTEL_INFO X-Git-Tag: v3.18-rc1~44^2~73^2~72 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=dbbe91279511d6a18a521b953a3c139e4787e660;p=platform%2Fkernel%2Flinux-exynos.git drm/i915: Agnostic INTEL_INFO Adapt the macro so that we can pass either the struct drm_device or the struct drm_i915_private pointers and get the answer we want. Over time, my plan is to convert all users over to using drm_i915_private and so trimming down the pointer dance. Having spent a few hours chasing that goal and achieved over 8k of object code saving, it appears to be a worthwhile target. This interim macro allows us to slowly convert over. Signed-off-by: Chris Wilson [danvet: Drop the (struct drm_device *) cast per the m-l discussion. Also explain the seemingly unecessary first cast.] Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 1867e26..1763fbf 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1596,6 +1596,9 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) if (!drm_core_check_feature(dev, DRIVER_MODESET) && !dev->agp) return -EINVAL; + /* For the ugly agnostic INTEL_INFO macro */ + BUILD_BUG_ON(sizeof(*dev_priv) == sizeof(*dev)); + dev_priv = kzalloc(sizeof(*dev_priv), GFP_KERNEL); if (dev_priv == NULL) return -ENOMEM; diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 8a55f07..6959c1b 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1981,7 +1981,10 @@ struct drm_i915_cmd_table { int count; }; -#define INTEL_INFO(p) (&to_i915(p)->info) +/* Note that the (struct drm_i915_private *) cast is just to shut up gcc. */ +#define __I915__(p) ((sizeof(*(p)) == sizeof(struct drm_i915_private)) ? \ + (struct drm_i915_private *)(p) : to_i915(p)) +#define INTEL_INFO(p) (&__I915__(p)->info) #define INTEL_DEVID(p) (INTEL_INFO(p)->device_id) #define IS_I830(dev) (INTEL_DEVID(dev) == 0x3577)