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Subjectdrivers/pwm/pwm-gpio.c:60:22: warning: no previous prototype for 'gpio_pwm_timer'
tree:   https://github.com/tobetter/linux odroid-5.19.y
head: 0569e1291a824471ea27c9e90132881c0232a3a0
commit: e76d6cf1a5ecd46156c2dc716f5acfba766156f6 ODROID-COMMON: pwm: gpio: Add a generic gpio based PWM driver
date: 8 days ago
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220719/202207192231.Py9az5ky-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/tobetter/linux/commit/e76d6cf1a5ecd46156c2dc716f5acfba766156f6
git remote add tobetter https://github.com/tobetter/linux
git fetch --no-tags tobetter odroid-5.19.y
git checkout e76d6cf1a5ecd46156c2dc716f5acfba766156f6
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/pwm/

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

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
https://01.org/lkp

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