Hi Ramalingam,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm-intel/for-linux-next]
[cannot apply to v5.3 next-20190919]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    
https://github.com/0day-ci/linux/commits/Ramalingam-C/drm-i915-Create-dumb-buffer-from-LMEM/20190920-020825
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-randconfig-f003-201937 (attached as .config)
compiler: gcc-7 (Debian 7.4.0-13) 7.4.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 
:::::: branch date: 4 hours ago
:::::: commit date: 4 hours ago

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <[email protected]>

All errors (new ones prefixed by >>):

   drivers/gpu//drm/i915/i915_gem.c:162:23: error: 'enum intel_region_id' 
declared inside parameter list will not be visible outside of this definition 
or declaration [-Werror]
      u32 *handle_p, enum intel_region_id mem_region)
                          ^~~~~~~~~~~~~~~
   drivers/gpu//drm/i915/i915_gem.c:162:39: error: parameter 5 ('mem_region') 
has incomplete type
      u32 *handle_p, enum intel_region_id mem_region)
                                          ^~~~~~~~~~
   drivers/gpu//drm/i915/i915_gem.c:159:1: error: function declaration isn't a 
prototype [-Werror=strict-prototypes]
    i915_gem_create(struct drm_file *file,
    ^~~~~~~~~~~~~~~
   drivers/gpu//drm/i915/i915_gem.c: In function 'i915_gem_create':
   drivers/gpu//drm/i915/i915_gem.c:174:20: error: 'INTEL_MEMORY_LMEM' 
undeclared (first use in this function); did you mean 'INTEL_GEMINILAKE'?
     if (mem_region == INTEL_MEMORY_LMEM)
                       ^~~~~~~~~~~~~~~~~
                       INTEL_GEMINILAKE
   drivers/gpu//drm/i915/i915_gem.c:174:20: note: each undeclared identifier is 
reported only once for each function it appears in
   drivers/gpu//drm/i915/i915_gem.c:175:9: error: implicit declaration of 
function 'i915_gem_object_create_lmem'; did you mean 
'i915_gem_object_create_shmem'? [-Werror=implicit-function-declaration]
      obj = i915_gem_object_create_lmem(dev_priv, size, 0);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~
            i915_gem_object_create_shmem
>> drivers/gpu//drm/i915/i915_gem.c:175:7: error: assignment makes pointer from 
>> integer without a cast [-Werror=int-conversion]
      obj = i915_gem_object_create_lmem(dev_priv, size, 0);
          ^
   drivers/gpu//drm/i915/i915_gem.c:176:25: error: 'INTEL_MEMORY_STOLEN' 
undeclared (first use in this function); did you mean 'INTEL_MEMORY_LMEM'?
     else if (mem_region == INTEL_MEMORY_STOLEN)
                            ^~~~~~~~~~~~~~~~~~~
                            INTEL_MEMORY_LMEM
   drivers/gpu//drm/i915/i915_gem.c: In function 'i915_gem_dumb_create':
   drivers/gpu//drm/i915/i915_gem.c:199:7: error: variable 'mem_region' has 
initializer but incomplete type
     enum intel_region_id mem_region = INTEL_MEMORY_UKNOWN;
          ^~~~~~~~~~~~~~~
   drivers/gpu//drm/i915/i915_gem.c:199:36: error: 'INTEL_MEMORY_UKNOWN' 
undeclared (first use in this function); did you mean 'INTEL_DRAM_UNKNOWN'?
     enum intel_region_id mem_region = INTEL_MEMORY_UKNOWN;
                                       ^~~~~~~~~~~~~~~~~~~
                                       INTEL_DRAM_UNKNOWN
   drivers/gpu//drm/i915/i915_gem.c:199:23: error: storage size of 'mem_region' 
isn't known
     enum intel_region_id mem_region = INTEL_MEMORY_UKNOWN;
                          ^~~~~~~~~~
   drivers/gpu//drm/i915/i915_gem.c:227:6: error: implicit declaration of 
function 'HAS_LMEM'; did you mean 'HAS_GMCH'? 
[-Werror=implicit-function-declaration]
     if (HAS_LMEM(to_i915(dev)))
         ^~~~~~~~
         HAS_GMCH
   drivers/gpu//drm/i915/i915_gem.c:228:16: error: 'INTEL_MEMORY_LMEM' 
undeclared (first use in this function); did you mean 'INTEL_MEMORY_UKNOWN'?
      mem_region = INTEL_MEMORY_LMEM;
                   ^~~~~~~~~~~~~~~~~
                   INTEL_MEMORY_UKNOWN
>> drivers/gpu//drm/i915/i915_gem.c:199:23: error: unused variable 'mem_region' 
>> [-Werror=unused-variable]
     enum intel_region_id mem_region = INTEL_MEMORY_UKNOWN;
                          ^~~~~~~~~~
   drivers/gpu//drm/i915/i915_gem.c: In function 'i915_gem_create_ioctl':
   drivers/gpu//drm/i915/i915_gem.c:250:39: error: 'INTEL_MEMORY_UKNOWN' 
undeclared (first use in this function); did you mean 'INTEL_DRAM_UNKNOWN'?
              &args->size, &args->handle, INTEL_MEMORY_UKNOWN);
                                          ^~~~~~~~~~~~~~~~~~~
                                          INTEL_DRAM_UNKNOWN
   drivers/gpu//drm/i915/i915_gem.c: In function 'i915_gem_dumb_create':
   drivers/gpu//drm/i915/i915_gem.c:232:1: error: control reaches end of 
non-void function [-Werror=return-type]
    }
    ^
   drivers/gpu//drm/i915/i915_gem.c: In function 'i915_gem_create_ioctl':
   drivers/gpu//drm/i915/i915_gem.c:251:1: error: control reaches end of 
non-void function [-Werror=return-type]
    }
    ^
   cc1: all warnings being treated as errors

# 
https://github.com/0day-ci/linux/commit/3b75523cb0b12a5692ef98d5dbe775070204c3cb
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout 3b75523cb0b12a5692ef98d5dbe775070204c3cb
vim +/mem_region +199 drivers/gpu//drm/i915/i915_gem.c

00731155a73020 Chris Wilson     2014-05-21  157  
ff72145badb834 Dave Airlie      2011-02-07  158  static int
ff72145badb834 Dave Airlie      2011-02-07  159  i915_gem_create(struct 
drm_file *file,
12d79d78287cdc Tvrtko Ursulin   2016-12-01  160                 struct 
drm_i915_private *dev_priv,
e163484afa8d6b Michał Winiarski 2019-03-26  161                 u64 *size_p,
3b75523cb0b12a Ramalingam C     2019-09-19  162                 u32 *handle_p, 
enum intel_region_id mem_region)
673a394b1e3b69 Eric Anholt      2008-07-30  163  {
05394f3975dceb Chris Wilson     2010-11-08  164         struct 
drm_i915_gem_object *obj;
a1a2d1d32250f6 Pekka Paalanen   2009-08-23  165         u32 handle;
e163484afa8d6b Michał Winiarski 2019-03-26  166         u64 size;
e163484afa8d6b Michał Winiarski 2019-03-26  167         int ret;
673a394b1e3b69 Eric Anholt      2008-07-30  168  
e163484afa8d6b Michał Winiarski 2019-03-26  169         size = 
round_up(*size_p, PAGE_SIZE);
8ffc02468145ac Chris Wilson     2011-09-14  170         if (size == 0)
8ffc02468145ac Chris Wilson     2011-09-14  171                 return -EINVAL;
673a394b1e3b69 Eric Anholt      2008-07-30  172  
673a394b1e3b69 Eric Anholt      2008-07-30  173         /* Allocate the new 
object */
3b75523cb0b12a Ramalingam C     2019-09-19 @174         if (mem_region == 
INTEL_MEMORY_LMEM)
3b75523cb0b12a Ramalingam C     2019-09-19 @175                 obj = 
i915_gem_object_create_lmem(dev_priv, size, 0);
3b75523cb0b12a Ramalingam C     2019-09-19  176         else if (mem_region == 
INTEL_MEMORY_STOLEN)
3b75523cb0b12a Ramalingam C     2019-09-19  177                 obj = 
i915_gem_object_create_stolen(dev_priv, size);
3b75523cb0b12a Ramalingam C     2019-09-19  178         else
8475355f7a2645 Chris Wilson     2019-05-28  179                 obj = 
i915_gem_object_create_shmem(dev_priv, size);
fe3db79b0b5019 Chris Wilson     2016-04-25  180         if (IS_ERR(obj))
fe3db79b0b5019 Chris Wilson     2016-04-25  181                 return 
PTR_ERR(obj);
673a394b1e3b69 Eric Anholt      2008-07-30  182  
05394f3975dceb Chris Wilson     2010-11-08  183         ret = 
drm_gem_handle_create(file, &obj->base, &handle);
202f2fef7a1aa6 Chris Wilson     2010-10-14  184         /* drop reference from 
allocate - handle holds it now */
f0cd518206e1a4 Chris Wilson     2016-10-28  185         
i915_gem_object_put(obj);
d861e338765029 Daniel Vetter    2013-07-24  186         if (ret)
d861e338765029 Daniel Vetter    2013-07-24  187                 return ret;
202f2fef7a1aa6 Chris Wilson     2010-10-14  188  
ff72145badb834 Dave Airlie      2011-02-07  189         *handle_p = handle;
99534023490686 Chris Wilson     2019-04-17  190         *size_p = size;
673a394b1e3b69 Eric Anholt      2008-07-30  191         return 0;
673a394b1e3b69 Eric Anholt      2008-07-30  192  }
673a394b1e3b69 Eric Anholt      2008-07-30  193  
ff72145badb834 Dave Airlie      2011-02-07  194  int
ff72145badb834 Dave Airlie      2011-02-07  195  i915_gem_dumb_create(struct 
drm_file *file,
ff72145badb834 Dave Airlie      2011-02-07  196                      struct 
drm_device *dev,
ff72145badb834 Dave Airlie      2011-02-07  197                      struct 
drm_mode_create_dumb *args)
ff72145badb834 Dave Airlie      2011-02-07  198  {
3b75523cb0b12a Ramalingam C     2019-09-19 @199         enum intel_region_id 
mem_region = INTEL_MEMORY_UKNOWN;
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  200         int cpp = 
DIV_ROUND_UP(args->bpp, 8);
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  201         u32 format;
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  202  
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  203         switch (cpp) {
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  204         case 1:
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  205                 format = 
DRM_FORMAT_C8;
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  206                 break;
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  207         case 2:
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  208                 format = 
DRM_FORMAT_RGB565;
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  209                 break;
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  210         case 4:
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  211                 format = 
DRM_FORMAT_XRGB8888;
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  212                 break;
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  213         default:
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  214                 return -EINVAL;
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  215         }
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  216  
ff72145badb834 Dave Airlie      2011-02-07  217         /* have to work out 
size/pitch and return them */
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  218         args->pitch = 
ALIGN(args->width * cpp, 64);
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  219  
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  220         /* align stride to page 
size so that we can remap */
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  221         if (args->pitch > 
intel_plane_fb_max_stride(to_i915(dev), format,
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  222                                 
                    DRM_FORMAT_MOD_LINEAR))
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  223                 args->pitch = 
ALIGN(args->pitch, 4096);
aa5ca8b7421cdb Ville Syrjälä    2019-05-09  224  
ff72145badb834 Dave Airlie      2011-02-07  225         args->size = 
args->pitch * args->height;
3b75523cb0b12a Ramalingam C     2019-09-19  226  
3b75523cb0b12a Ramalingam C     2019-09-19 @227         if 
(HAS_LMEM(to_i915(dev)))
3b75523cb0b12a Ramalingam C     2019-09-19  228                 mem_region = 
INTEL_MEMORY_LMEM;
3b75523cb0b12a Ramalingam C     2019-09-19  229  
12d79d78287cdc Tvrtko Ursulin   2016-12-01  230         return 
i915_gem_create(file, to_i915(dev),
3b75523cb0b12a Ramalingam C     2019-09-19  231                                
&args->size, &args->handle, mem_region);
ff72145badb834 Dave Airlie      2011-02-07  232  }
ff72145badb834 Dave Airlie      2011-02-07  233  

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