[brauner:debugfs_namespaces 1/3] kernel/nsproxy.c:279:9: warning: assignment to 'struct dentry *' from 'int' makes pointer from integer without a cast

[brauner:debugfs_namespaces 1/3] kernel/nsproxy.c:279:9: warning: assignment to 'struct dentry *' from 'int' makes pointer from integer without a cast

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git debugfs_namespaces
head:   ad23ea92bb6b71c09f3cb9361d3e48e86f6f1d78
commit: f06faf7ef86c30c19dee31796e85f473e4faadf6 [1/3] nsproxy: add debugfs entry
config: nds32-defconfig (attached as .config)
compiler: nds32le-linux-gcc (GCC) 8.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout f06faf7ef86c30c19dee31796e85f473e4faadf6
        # save the attached .config to linux build tree
        GCC_VERSION=8.1.0 make.cross ARCH=nds32 

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

All warnings (new ones prefixed by >>):

   kernel/nsproxy.c: In function 'init_ns_debugfs':
   kernel/nsproxy.c:279:11: error: implicit declaration of function 'debugfs_create_dir'; did you mean 'kernfs_create_dir'? [-Werror=implicit-function-declaration]
     ns_dir = debugfs_create_dir("ns", NULL);
              ^~~~~~~~~~~~~~~~~~
              kernfs_create_dir
>> kernel/nsproxy.c:279:9: warning: assignment to 'struct dentry *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     ns_dir = debugfs_create_dir("ns", NULL);
            ^
   cc1: some warnings being treated as errors

vim +279 kernel/nsproxy.c

   274	
   275	static int __init init_ns_debugfs(void)
   276	{
   277		struct dentry *ns_dir;
   278	
 > 279		ns_dir = debugfs_create_dir("ns", NULL);

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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