Re: [PATCH] mm: hugetlb: eliminate memory-less nodes handling

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

Hi Muchun,

I love your patch! Yet something to improve:

[auto build test ERROR on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Muchun-Song/mm-hugetlb-eliminate-memory-less-nodes-handling/20220901-163132
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
config: loongarch-buildonly-randconfig-r004-20220901 (https://download.01.org/0day-ci/archive/20220902/202209021255.1ChhyCsl-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/8e3d203cb06be81565d117b3f6d5e279a833174c
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Muchun-Song/mm-hugetlb-eliminate-memory-less-nodes-handling/20220901-163132
        git checkout 8e3d203cb06be81565d117b3f6d5e279a833174c
        # save the config file
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 ARCH=loongarch 

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/base/node.c: In function 'register_node':
>> drivers/base/node.c:614:17: error: implicit declaration of function 'hugetlb_register_node'; did you mean 'unregister_node'? [-Werror=implicit-function-declaration]
     614 |                 hugetlb_register_node(node);
         |                 ^~~~~~~~~~~~~~~~~~~~~
         |                 unregister_node
   drivers/base/node.c: In function 'unregister_node':
>> drivers/base/node.c:630:9: error: implicit declaration of function 'hugetlb_unregister_node'; did you mean 'unregister_node'? [-Werror=implicit-function-declaration]
     630 |         hugetlb_unregister_node(node);
         |         ^~~~~~~~~~~~~~~~~~~~~~~
         |         unregister_node
   cc1: some warnings being treated as errors


vim +614 drivers/base/node.c

   594	
   595	/*
   596	 * register_node - Setup a sysfs device for a node.
   597	 * @num - Node number to use when creating the device.
   598	 *
   599	 * Initialize and register the node device.
   600	 */
   601	static int register_node(struct node *node, int num)
   602	{
   603		int error;
   604	
   605		node->dev.id = num;
   606		node->dev.bus = &node_subsys;
   607		node->dev.release = node_device_release;
   608		node->dev.groups = node_dev_groups;
   609		error = device_register(&node->dev);
   610	
   611		if (error) {
   612			put_device(&node->dev);
   613		} else {
 > 614			hugetlb_register_node(node);
   615			compaction_register_node(node);
   616		}
   617	
   618		return error;
   619	}
   620	
   621	/**
   622	 * unregister_node - unregister a node device
   623	 * @node: node going away
   624	 *
   625	 * Unregisters a node device @node.  All the devices on the node must be
   626	 * unregistered before calling this function.
   627	 */
   628	void unregister_node(struct node *node)
   629	{
 > 630		hugetlb_unregister_node(node);
   631		compaction_unregister_node(node);
   632		node_remove_accesses(node);
   633		node_remove_caches(node);
   634		device_unregister(&node->dev);
   635	}
   636	

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