[PATCH] uacce: Add uacce_ctrl misc device

[kernel test robot]

Hi Zhou,

I love your patch! Perhaps something to improve:

[auto build test WARNING on char-misc/char-misc-testing]
[also build test WARNING on soc/for-next linux/master linus/master v5.11-rc4 next-20210120]
[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]

url:    https://github.com/0day-ci/linux/commits/Zhou-Wang/uacce-Add-uacce_ctrl-misc-device/20210121-172139
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git f6f1f8e6e3eea25f539105d48166e91f0ab46dd1
config: nios2-randconfig-r023-20210121 (attached as .config)
compiler: nios2-linux-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/4dc40d891a7e60ed79e6b9460a38a142d3d1a965
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Zhou-Wang/uacce-Add-uacce_ctrl-misc-device/20210121-172139
        git checkout 4dc40d891a7e60ed79e6b9460a38a142d3d1a965
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nios2 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp at intel.com>

All warnings (new ones prefixed by >>):

>> drivers/misc/uacce/uacce.c:511:5: warning: no previous prototype for 'uacce_ctrl_open' [-Wmissing-prototypes]
     511 | int uacce_ctrl_open(struct inode *inode, struct file *file)
         |     ^~~~~~~~~~~~~~~
>> drivers/misc/uacce/uacce.c:525:5: warning: no previous prototype for 'uacce_ctrl_release' [-Wmissing-prototypes]
     525 | int uacce_ctrl_release(struct inode *inode, struct file *file)
         |     ^~~~~~~~~~~~~~~~~~
   drivers/misc/uacce/uacce.c: In function 'uacce_ctrl_unl_ioctl':
   drivers/misc/uacce/uacce.c:626:6: warning: unused variable 'ret' [-Wunused-variable]
     626 |  int ret;
         |      ^~~


vim +/uacce_ctrl_open +511 drivers/misc/uacce/uacce.c

   510	
 > 511	int uacce_ctrl_open(struct inode *inode, struct file *file)
   512	{
   513		struct uacce_pin_container *p;
   514	
   515		p = kzalloc(sizeof(*p), GFP_KERNEL);
   516		if (!p)
   517			return -ENOMEM;
   518		file->private_data = p;
   519	
   520		xa_init(&p->array);
   521	
   522		return 0;
   523	}
   524	
 > 525	int uacce_ctrl_release(struct inode *inode, struct file *file)
   526	{
   527		struct uacce_pin_container *priv = file->private_data;
   528		struct pin_pages *p;
   529		unsigned long idx;
   530	
   531		xa_for_each(&priv->array, idx, p) {
   532			unpin_user_pages(p->pages, p->nr_pages);
   533			xa_erase(&priv->array, p->first);
   534			vfree(p->pages);
   535			kfree(p);
   536		}
   537	
   538		xa_destroy(&priv->array);
   539		kfree(priv);
   540	
   541		return 0;
   542	}
   543	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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