Re: [PATCH v2 04/10] mm/cma: Allow dynamically creating CMA areas

[kernel test robot <lkp@intel.com>]

Hi Thierry,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]
[also build test ERROR on next-20260122]
[cannot apply to drm-misc/drm-misc-next robh/for-next linus/master v6.19-rc6]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Thierry-Reding/dt-bindings-reserved-memory-Document-Tegra-VPR/20260123-001244
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20260122161009.3865888-5-thierry.reding%40kernel.org
patch subject: [PATCH v2 04/10] mm/cma: Allow dynamically creating CMA areas
config: openrisc-randconfig-r072-20260123 (https://download.01.org/0day-ci/archive/20260123/202601231052.RfGOFd3g-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 15.2.0
smatch version: v0.5.0-8994-gd50c5a4c
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260123/202601231052.RfGOFd3g-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601231052.RfGOFd3g-lkp@intel.com/

All errors (new ones prefixed by >>):

   mm/cma_sysfs.c: In function 'cma_sysfs_init':
>> mm/cma_sysfs.c:119:25: error: 'cma_area_count' undeclared (first use in this function); did you mean 'cma_early_area_count'?
     119 |         for (i = 0; i < cma_area_count; i++) {
         |                         ^~~~~~~~~~~~~~
         |                         cma_early_area_count
   mm/cma_sysfs.c:119:25: note: each undeclared identifier is reported only once for each function it appears in
>> mm/cma_sysfs.c:126:24: error: 'cma_areas' undeclared (first use in this function); did you mean 'cma_attrs'?
     126 |                 cma = &cma_areas[i];
         |                        ^~~~~~~~~
         |                        cma_attrs


vim +119 mm/cma_sysfs.c

43ca106fa8ec7d Minchan Kim 2021-05-04  107  
43ca106fa8ec7d Minchan Kim 2021-05-04  108  static int __init cma_sysfs_init(void)
43ca106fa8ec7d Minchan Kim 2021-05-04  109  {
43ca106fa8ec7d Minchan Kim 2021-05-04  110  	struct kobject *cma_kobj_root;
43ca106fa8ec7d Minchan Kim 2021-05-04  111  	struct cma_kobject *cma_kobj;
43ca106fa8ec7d Minchan Kim 2021-05-04  112  	struct cma *cma;
43ca106fa8ec7d Minchan Kim 2021-05-04  113  	int i, err;
43ca106fa8ec7d Minchan Kim 2021-05-04  114  
43ca106fa8ec7d Minchan Kim 2021-05-04  115  	cma_kobj_root = kobject_create_and_add("cma", mm_kobj);
43ca106fa8ec7d Minchan Kim 2021-05-04  116  	if (!cma_kobj_root)
43ca106fa8ec7d Minchan Kim 2021-05-04  117  		return -ENOMEM;
43ca106fa8ec7d Minchan Kim 2021-05-04  118  
43ca106fa8ec7d Minchan Kim 2021-05-04 @119  	for (i = 0; i < cma_area_count; i++) {
43ca106fa8ec7d Minchan Kim 2021-05-04  120  		cma_kobj = kzalloc(sizeof(*cma_kobj), GFP_KERNEL);
43ca106fa8ec7d Minchan Kim 2021-05-04  121  		if (!cma_kobj) {
43ca106fa8ec7d Minchan Kim 2021-05-04  122  			err = -ENOMEM;
43ca106fa8ec7d Minchan Kim 2021-05-04  123  			goto out;
43ca106fa8ec7d Minchan Kim 2021-05-04  124  		}
43ca106fa8ec7d Minchan Kim 2021-05-04  125  
43ca106fa8ec7d Minchan Kim 2021-05-04 @126  		cma = &cma_areas[i];

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