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Subject[andersson:wip/sm8350-next-20211118 46/51] drivers/gpu/drm/msm/dp/dp_display.c:420:6: warning: no previous prototype for function 'dp_display_oob_hotplug_event'
tree:   https://github.com/andersson/kernel wip/sm8350-next-20211118
head: d4e3c3fe1bf25b7e421edef192756bee5bc1ffac
commit: 6cc13d7c2d774fa5b1c7f024ce7e1c7313af4a2f [46/51] drm/msm/dp: Wire up oob callback
config: hexagon-randconfig-r041-20211207 (https://download.01.org/0day-ci/archive/20211208/202112081851.ZhEZUbXt-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a)
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/andersson/kernel/commit/6cc13d7c2d774fa5b1c7f024ce7e1c7313af4a2f
git remote add andersson https://github.com/andersson/kernel
git fetch --no-tags andersson wip/sm8350-next-20211118
git checkout 6cc13d7c2d774fa5b1c7f024ce7e1c7313af4a2f
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/gpu/drm/msm/

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/gpu/drm/msm/dp/dp_display.c:420:6: warning: no previous prototype for function 'dp_display_oob_hotplug_event' [-Wmissing-prototypes]
void dp_display_oob_hotplug_event(struct msm_dp *dp_display)
^
drivers/gpu/drm/msm/dp/dp_display.c:420:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void dp_display_oob_hotplug_event(struct msm_dp *dp_display)
^
static
1 warning generated.


vim +/dp_display_oob_hotplug_event +420 drivers/gpu/drm/msm/dp/dp_display.c

419
> 420 void dp_display_oob_hotplug_event(struct msm_dp *dp_display)
421 {
422 struct dp_display_private *dp;
423 static bool current_state;
424
425 dp = container_of(dp_display, struct dp_display_private, dp_display);
426
427 printk(KERN_ERR "=================================== %s() hpd_state: %d current_state: %d\n", __func__, dp->hpd_state, current_state);
428
429 if (!current_state) {
430 dp_display_host_init(dp, false);
431 dp_display_process_hpd_high(dp);
432 } else {
433 dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
434 }
435
436 current_state = !current_state;
437

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

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