Re: [PATCH] usb: roles: try to get/put all relevant modules

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

Hi Xu,

kernel test robot noticed the following build warnings:

[auto build test WARNING on usb/usb-testing]
[also build test WARNING on usb/usb-next usb/usb-linus hid/for-next westeri-thunderbolt/next linus/master v6.7 next-20240112]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Xu-Yang/usb-roles-try-to-get-put-all-relevant-modules/20240112-155735
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
patch link:    https://lore.kernel.org/r/20240112080108.1147450-1-xu.yang_2%40nxp.com
patch subject: [PATCH] usb: roles: try to get/put all relevant modules
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20240115/202401150608.0Ok2pmGw-lkp@intel.com/config)
compiler: clang version 18.0.0git (https://github.com/llvm/llvm-project 9bde5becb44ea071f5e1fa1f5d4071dc8788b18c)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240115/202401150608.0Ok2pmGw-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/202401150608.0Ok2pmGw-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/usb/roles/class.c:37:6: warning: no previous prototype for function 'usb_role_switch_get_modules' [-Wmissing-prototypes]
      37 | void usb_role_switch_get_modules(struct device *dev)
         |      ^
   drivers/usb/roles/class.c:37:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      37 | void usb_role_switch_get_modules(struct device *dev)
         | ^
         | static 
>> drivers/usb/roles/class.c:46:6: warning: no previous prototype for function 'usb_role_switch_put_modules' [-Wmissing-prototypes]
      46 | void usb_role_switch_put_modules(struct device *dev)
         |      ^
   drivers/usb/roles/class.c:46:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
      46 | void usb_role_switch_put_modules(struct device *dev)
         | ^
         | static 
   2 warnings generated.


vim +/usb_role_switch_get_modules +37 drivers/usb/roles/class.c

    36	
  > 37	void usb_role_switch_get_modules(struct device *dev)
    38	{
    39		while (dev) {
    40			if (dev->driver)
    41				WARN_ON(!try_module_get(dev->driver->owner));
    42			dev = dev->parent;
    43		}
    44	}
    45	
  > 46	void usb_role_switch_put_modules(struct device *dev)
    47	{
    48		while (dev) {
    49			if (dev->driver)
    50				module_put(dev->driver->owner);
    51			dev = dev->parent;
    52		}
    53	}
    54	

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