[tobetter:odroid-5.16.y 8/39] drivers/pwm/pwm-gpio.c:60:22: warning: no previous prototype for 'gpio_pwm_timer'

From: kernel test robot
Date: Wed Jan 12 2022 - 09:23:11 EST


tree: https://github.com/tobetter/linux odroid-5.16.y
head: cb59f7f629212302d4136a919ef9822aa9c84aac
commit: 9dd6bb4ad958df52219ba8a54e11fad21c546a03 [8/39] ODROID-COMMON: pwm: gpio: Add a generic gpio based PWM driver
config: arc-allyesconfig (https://download.01.org/0day-ci/archive/20220112/202201122200.YLzDW2yK-lkp@xxxxxxxxx/config)
compiler: arceb-elf-gcc (GCC) 11.2.0
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/tobetter/linux/commit/9dd6bb4ad958df52219ba8a54e11fad21c546a03
git remote add tobetter https://github.com/tobetter/linux
git fetch --no-tags tobetter odroid-5.16.y
git checkout 9dd6bb4ad958df52219ba8a54e11fad21c546a03
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arc SHELL=/bin/bash drivers/pwm/

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

All warnings (new ones prefixed by >>):

>> drivers/pwm/pwm-gpio.c:60:22: warning: no previous prototype for 'gpio_pwm_timer' [-Wmissing-prototypes]
60 | enum hrtimer_restart gpio_pwm_timer(struct hrtimer *timer)
| ^~~~~~~~~~~~~~


vim +/gpio_pwm_timer +60 drivers/pwm/pwm-gpio.c

59
> 60 enum hrtimer_restart gpio_pwm_timer(struct hrtimer *timer)
61 {
62 struct gpio_pwm_data *gpio_data = container_of(timer,
63 struct gpio_pwm_data,
64 timer);
65 if (!gpio_data->run) {
66 gpio_pwm_off(gpio_data);
67 gpio_data->pin_on = false;
68 return HRTIMER_NORESTART;
69 }
70
71 if (!gpio_data->pin_on) {
72 hrtimer_forward_now(&gpio_data->timer,
73 ns_to_ktime(gpio_data->on_time));
74 gpio_pwm_on(gpio_data);
75 gpio_data->pin_on = true;
76 } else {
77 hrtimer_forward_now(&gpio_data->timer,
78 ns_to_ktime(gpio_data->off_time));
79 gpio_pwm_off(gpio_data);
80 gpio_data->pin_on = false;
81 }
82
83 return HRTIMER_RESTART;
84 }
85

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