Hi Praveen,

[auto build test ERROR on drm-intel/for-linux-next]
[also build test ERROR on v4.11-rc2 next-20170310]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Praveen-Paneri/drm-i915-Enable-FBC-for-non-X-tiled-FBs/20170318-084727
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: x86_64-randconfig-x003-201711 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All error/warnings (new ones prefixed by >>):

   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from include/linux/async.h:15,
                    from drivers/gpu/drm/i915/intel_drv.h:28,
                    from drivers/gpu/drm/i915/intel_fbc.c:41:
   drivers/gpu/drm/i915/intel_fbc.c: In function 'gen7_fbc_activate':
>> drivers/gpu/drm/i915/intel_fbc.c:305:33: error: 'cache' undeclared (first use in this function)
         i915_gem_object_get_tiling(cache->vma->obj) != I915_TILING_X) {
                                    ^
   include/linux/compiler.h:160:30: note: in definition of macro '__trace_if'
     if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
                                 ^~~~
>> drivers/gpu/drm/i915/intel_fbc.c:304:2: note: in expansion of macro 'if'
     if (INTEL_GEN(dev_priv) >= 9 &&
     ^~
   drivers/gpu/drm/i915/intel_fbc.c:305:33: note: each undeclared identifier is reported only once for each function it appears in
         i915_gem_object_get_tiling(cache->vma->obj) != I915_TILING_X) {
                                    ^
   include/linux/compiler.h:160:30: note: in definition of macro '__trace_if'
     if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
                                 ^~~~
>> drivers/gpu/drm/i915/intel_fbc.c:304:2: note: in expansion of macro 'if'
     if (INTEL_GEN(dev_priv) >= 9 &&
     ^~

vim +/cache +305 drivers/gpu/drm/i915/intel_fbc.c

   298	static void gen7_fbc_activate(struct drm_i915_private *dev_priv)
   299	{
   300		struct intel_fbc_reg_params *params = &dev_priv->fbc.params;
   301		u32 dpfc_ctl;
   302		int threshold = dev_priv->fbc.threshold;
   303	
 > 304		if (INTEL_GEN(dev_priv) >= 9 &&
 > 305		    i915_gem_object_get_tiling(cache->vma->obj) != I915_TILING_X) {
   306			struct intel_fbc_state_cache *cache = &dev_priv->fbc.state_cache;
   307			int cfb_stride = DIV_ROUND_UP(cache->plane.src_w,
   308						      (32 * threshold)) * 8;

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