Re: [PATCH 01/13] a2b: add A2B driver core

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

Hi Alvin,

kernel test robot noticed the following build errors:

[auto build test ERROR on c75962170e49f24399141276ae119e6a879f36dc]

url:    https://github.com/intel-lab-lkp/linux/commits/Alvin-ipraga/a2b-add-A2B-driver-core/20240517-211849
base:   c75962170e49f24399141276ae119e6a879f36dc
patch link:    https://lore.kernel.org/r/20240517-a2b-v1-1-b8647554c67b%40bang-olufsen.dk
patch subject: [PATCH 01/13] a2b: add A2B driver core
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20240518/202405182008.zWMVYQ6g-lkp@intel.com/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240518/202405182008.zWMVYQ6g-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/202405182008.zWMVYQ6g-lkp@intel.com/

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

   drivers/a2b/a2b.c: In function 'a2b_bus_of_add_node':
>> drivers/a2b/a2b.c:463:16: error: implicit declaration of function 'kzalloc' [-Werror=implicit-function-declaration]
     463 |         node = kzalloc(sizeof(*node), GFP_KERNEL);
         |                ^~~~~~~
>> drivers/a2b/a2b.c:463:14: warning: assignment to 'struct a2b_node *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     463 |         node = kzalloc(sizeof(*node), GFP_KERNEL);
         |              ^
   drivers/a2b/a2b.c: In function 'a2b_node_of_add_func':
>> drivers/a2b/a2b.c:1017:14: warning: assignment to 'struct a2b_func *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    1017 |         func = kzalloc(sizeof(*func), GFP_KERNEL);
         |              ^
   drivers/a2b/a2b.c: In function 'a2b_node_release':
>> drivers/a2b/a2b.c:1112:9: error: implicit declaration of function 'kfree' [-Werror=implicit-function-declaration]
    1112 |         kfree(node);
         |         ^~~~~
   cc1: some warnings being treated as errors


vim +/kzalloc +463 drivers/a2b/a2b.c

   444	
   445	static int a2b_bus_of_add_node(struct a2b_bus *bus, struct device_node *np,
   446				       unsigned int addr)
   447	{
   448		struct a2b_node *node;
   449		int ret = 0;
   450	
   451		if (!bus || !np)
   452			return -EINVAL;
   453	
   454		if (addr >= A2B_MAX_NODES)
   455			return -EINVAL;
   456	
   457		if (!of_device_is_available(np))
   458			return -ENODEV;
   459	
   460		if (of_node_test_and_set_flag(np, OF_POPULATED))
   461			return -EBUSY;
   462	
 > 463		node = kzalloc(sizeof(*node), GFP_KERNEL);
   464		if (IS_ERR(node))
   465			return -ENOMEM;
   466	
   467		node->dev.bus = &a2b_bus;
   468		node->dev.type = &a2b_node_type;
   469		node->dev.parent = &bus->dev;
   470		node->dev.of_node = np;
   471		node->dev.fwnode = of_fwnode_handle(np);
   472		dev_set_name(&node->dev, "a2b-%d.%d", bus->id, addr);
   473	
   474		node->bus = bus;
   475		node->addr = addr;
   476	
   477		/*
   478		 * Register the node device. Note that due to asynchronous probing,
   479		 * there is no guarantee that the node driver's probe function has been
   480		 * called just yet. The synchronization point is a2b_register_node(),
   481		 * which should be called unconditionally by node drivers.
   482		 */
   483		ret = device_register(&node->dev);
   484		if (ret)
   485			goto err_put_device;
   486	
   487		return 0;
   488	
   489	err_put_device:
   490		put_device(&node->dev);
   491	
   492		return ret;
   493	}
   494	

-- 
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