[linux-platform-drivers-x86:review-hans 37/38] drivers/platform/x86/firmware_attributes_class.c:16:5: warning: no previous prototype for function 'fw_attributes_class_get'

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

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git review-hans
head:   9972d91cd41540a1890435034b62653c98da4261
commit: 8535b9dea34f00781758999285cea8ab82bb0a2f [37/38] platform/x86: dell-wmi-sysman: Use firmware_attributes_class helper
config: x86_64-randconfig-r032-20210527 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6505c630407c5feec818f0bb1c284f9eeebf2071)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/commit/?id=8535b9dea34f00781758999285cea8ab82bb0a2f
        git remote add linux-platform-drivers-x86 https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git
        git fetch --no-tags linux-platform-drivers-x86 review-hans
        git checkout 8535b9dea34f00781758999285cea8ab82bb0a2f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/platform/x86/firmware_attributes_class.c:16:5: warning: no previous prototype for function 'fw_attributes_class_get' [-Wmissing-prototypes]
   int fw_attributes_class_get(struct class **fw_attr_class)
       ^
   drivers/platform/x86/firmware_attributes_class.c:16:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int fw_attributes_class_get(struct class **fw_attr_class)
   ^
   static 
>> drivers/platform/x86/firmware_attributes_class.c:35:5: warning: no previous prototype for function 'fw_attributes_class_put' [-Wmissing-prototypes]
   int fw_attributes_class_put(void)
       ^
   drivers/platform/x86/firmware_attributes_class.c:35:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int fw_attributes_class_put(void)
   ^
   static 
   2 warnings generated.


vim +/fw_attributes_class_get +16 drivers/platform/x86/firmware_attributes_class.c

6786a9252a615d Mark Pearson 2021-05-26  15  
6786a9252a615d Mark Pearson 2021-05-26 @16  int fw_attributes_class_get(struct class **fw_attr_class)
6786a9252a615d Mark Pearson 2021-05-26  17  {
6786a9252a615d Mark Pearson 2021-05-26  18  	int err;
6786a9252a615d Mark Pearson 2021-05-26  19  
6786a9252a615d Mark Pearson 2021-05-26  20  	mutex_lock(&fw_attr_lock);
6786a9252a615d Mark Pearson 2021-05-26  21  	if (!fw_attr_inuse) { /*first time class is being used*/
6786a9252a615d Mark Pearson 2021-05-26  22  		err = class_register(&firmware_attributes_class);
6786a9252a615d Mark Pearson 2021-05-26  23  		if (err) {
6786a9252a615d Mark Pearson 2021-05-26  24  			mutex_unlock(&fw_attr_lock);
6786a9252a615d Mark Pearson 2021-05-26  25  			return err;
6786a9252a615d Mark Pearson 2021-05-26  26  		}
6786a9252a615d Mark Pearson 2021-05-26  27  	}
6786a9252a615d Mark Pearson 2021-05-26  28  	fw_attr_inuse++;
6786a9252a615d Mark Pearson 2021-05-26  29  	*fw_attr_class = &firmware_attributes_class;
6786a9252a615d Mark Pearson 2021-05-26  30  	mutex_unlock(&fw_attr_lock);
6786a9252a615d Mark Pearson 2021-05-26  31  	return 0;
6786a9252a615d Mark Pearson 2021-05-26  32  }
6786a9252a615d Mark Pearson 2021-05-26  33  EXPORT_SYMBOL_GPL(fw_attributes_class_get);
6786a9252a615d Mark Pearson 2021-05-26  34  
6786a9252a615d Mark Pearson 2021-05-26 @35  int fw_attributes_class_put(void)
6786a9252a615d Mark Pearson 2021-05-26  36  {
6786a9252a615d Mark Pearson 2021-05-26  37  	mutex_lock(&fw_attr_lock);
6786a9252a615d Mark Pearson 2021-05-26  38  	if (!fw_attr_inuse) {
6786a9252a615d Mark Pearson 2021-05-26  39  		mutex_unlock(&fw_attr_lock);
6786a9252a615d Mark Pearson 2021-05-26  40  		return -EINVAL;
6786a9252a615d Mark Pearson 2021-05-26  41  	}
6786a9252a615d Mark Pearson 2021-05-26  42  	fw_attr_inuse--;
6786a9252a615d Mark Pearson 2021-05-26  43  	if (!fw_attr_inuse) /* No more consumers */
6786a9252a615d Mark Pearson 2021-05-26  44  		class_unregister(&firmware_attributes_class);
6786a9252a615d Mark Pearson 2021-05-26  45  	mutex_unlock(&fw_attr_lock);
6786a9252a615d Mark Pearson 2021-05-26  46  	return 0;
6786a9252a615d Mark Pearson 2021-05-26  47  }
6786a9252a615d Mark Pearson 2021-05-26  48  EXPORT_SYMBOL_GPL(fw_attributes_class_put);
6786a9252a615d Mark Pearson 2021-05-26  49  

:::::: The code at line 16 was first introduced by commit
:::::: 6786a9252a615d07fe26c147fb3d554f12e6a449 platform/x86: firmware_attributes_class: Create helper file for handling firmware-attributes class registration events

:::::: TO: Mark Pearson <markpearson@lenovo.com>
:::::: CC: Hans de Goede <hdegoede@redhat.com>

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

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