[chrome-os:chromeos-6.1 7/334] drivers/usb/gadget/function/f_accessory.c:1078:5: warning: no previous prototype for 'acc_ctrlrequest_composite'

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

tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-6.1
head:   357c6e4b48a407ae0a90fb4a1b61f63e1111fbbe
commit: 1a7e5d4a3fc8666fcb5d9eb055f5c7d979f08584 [7/334] FROMGIT: ANDROID: usb: f_accessory: Check buffer size when initialised via composite
config: arc-randconfig-r043-20230330 (https://download.01.org/0day-ci/archive/20230330/202303301317.ZunFrAWJ-lkp@intel.com/config)
compiler: arc-elf-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
        git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel
        git fetch --no-tags chrome-os chromeos-6.1
        git checkout 1a7e5d4a3fc8666fcb5d9eb055f5c7d979f08584
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash drivers/usb/gadget/function/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303301317.ZunFrAWJ-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/usb/gadget/function/f_accessory.c:965:5: warning: no previous prototype for 'acc_ctrlrequest' [-Wmissing-prototypes]
     965 | int acc_ctrlrequest(struct usb_composite_dev *cdev,
         |     ^~~~~~~~~~~~~~~
>> drivers/usb/gadget/function/f_accessory.c:1078:5: warning: no previous prototype for 'acc_ctrlrequest_composite' [-Wmissing-prototypes]
    1078 | int acc_ctrlrequest_composite(struct usb_composite_dev *cdev,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/usb/gadget/function/f_accessory.c:1419:6: warning: no previous prototype for 'acc_disconnect' [-Wmissing-prototypes]
    1419 | void acc_disconnect(void)
         |      ^~~~~~~~~~~~~~
   drivers/usb/gadget/function/f_accessory.c:1524:5: warning: no previous prototype for 'acc_ctrlrequest_configfs' [-Wmissing-prototypes]
    1524 | int acc_ctrlrequest_configfs(struct usb_function *f,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/acc_ctrlrequest_composite +1078 drivers/usb/gadget/function/f_accessory.c

  1077	
> 1078	int acc_ctrlrequest_composite(struct usb_composite_dev *cdev,
  1079				      const struct usb_ctrlrequest *ctrl)
  1080	{
  1081		u16 w_length = le16_to_cpu(ctrl->wLength);
  1082	
  1083		if (w_length > USB_COMP_EP0_BUFSIZ) {
  1084			if (ctrl->bRequestType & USB_DIR_IN) {
  1085				/* Cast away the const, we are going to overwrite on purpose. */
  1086				__le16 *temp = (__le16 *)&ctrl->wLength;
  1087	
  1088				*temp = cpu_to_le16(USB_COMP_EP0_BUFSIZ);
  1089				w_length = USB_COMP_EP0_BUFSIZ;
  1090			} else {
  1091				return -EINVAL;
  1092			}
  1093		}
  1094		return acc_ctrlrequest(cdev, ctrl);
  1095	}
  1096	EXPORT_SYMBOL_GPL(acc_ctrlrequest_composite);
  1097	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests