Re: [PATCH v2 17/28] drm/panthor: Add arbitration scheduler

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

Hi Karunika,

kernel test robot noticed the following build errors:

[auto build test ERROR on drm-misc/drm-misc-next]
[also build test ERROR on drm/drm-next drm-tip/drm-tip]
[cannot apply to linux-review/Karunika-Choo/drm-panthor-Ignore-EOPNOTSUPP-for-shader-present-nvmem-lookup/20260922-214455 daeinki-drm-exynos/exynos-drm-next drm-i915/for-linux-next drm-i915/for-linux-next-fixes linus/master v7.4-rc2 next-20261109]
[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/Karunika-Choo/drm-panthor-Ignore-EOPNOTSUPP-for-shader-present-nvmem-lookup/20261110-153822
base:   https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link:    https://lore.kernel.org/r/20261110153907.3241978-18-karunika.choo%40arm.com
patch subject: [PATCH v2 17/28] drm/panthor: Add arbitration scheduler
config: um-randconfig-1001-20261111 (https://download.01.org/0day-ci/archive/20261111/202611110840.2W7v6LAR-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261111/202611110840.2W7v6LAR-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/202611110840.2W7v6LAR-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:223:3: error: call to undeclared function 'hrtimer_start'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     223 |                 hrtimer_start(&sched->stop_timer.timer,
         |                 ^
>> drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:224:38: error: use of undeclared identifier 'HRTIMER_MODE_REL'
     224 |                               ms_to_ktime(yield_timeout), HRTIMER_MODE_REL);
         |                                                           ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:249:4: error: call to undeclared function 'hrtimer_start'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     249 |                         hrtimer_start(&sched->grant_timer.timer,
         |                         ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:251:11: error: use of undeclared identifier 'HRTIMER_MODE_REL'
     251 |                                       HRTIMER_MODE_REL);
         |                                       ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:291:3: error: call to undeclared function 'hrtimer_start'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     291 |                 hrtimer_start(&sched->close_timer.timer,
         |                 ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:292:38: error: use of undeclared identifier 'HRTIMER_MODE_REL'
     292 |                               ms_to_ktime(yield_timeout), HRTIMER_MODE_REL);
         |                                                           ^
>> drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:458:6: error: call to undeclared function 'hrtimer_is_queued'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     458 |         if (hrtimer_is_queued(timer))
         |             ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:483:6: error: call to undeclared function 'hrtimer_is_queued'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     483 |         if (hrtimer_is_queued(timer))
         |             ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:504:6: error: call to undeclared function 'hrtimer_is_queued'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     504 |         if (hrtimer_is_queued(timer))
         |             ^
>> drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:621:2: error: call to undeclared function 'hrtimer_cancel'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     621 |         hrtimer_cancel(&sched->grant_timer.timer);
         |         ^
>> drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:666:2: error: call to undeclared function 'hrtimer_setup'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     666 |         hrtimer_setup(&sched->grant_timer.timer,
         |         ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:668:26: error: use of undeclared identifier 'HRTIMER_MODE_REL'
     668 |                       CLOCK_MONOTONIC, HRTIMER_MODE_REL);
         |                                        ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:671:26: error: use of undeclared identifier 'HRTIMER_MODE_REL'
     671 |                       CLOCK_MONOTONIC, HRTIMER_MODE_REL);
         |                                        ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:674:26: error: use of undeclared identifier 'HRTIMER_MODE_REL'
     674 |                       CLOCK_MONOTONIC, HRTIMER_MODE_REL);
         |                                        ^
   drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c:807:2: error: call to undeclared function 'hrtimer_cancel'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     807 |         hrtimer_cancel(&sched->grant_timer.timer);
         |         ^
   15 errors generated.


vim +/hrtimer_start +223 drivers/gpu/drm/panthor/arbitration/panthor_arbitration_sched.c

   207	
   208	static void arb_sched_stop_locked(struct panthor_arbitration_sched *sched)
   209	{
   210		int ret;
   211	
   212		lockdep_assert_held(&sched->lock);
   213	
   214		ret = __arb_sched_stop_locked(sched);
   215		if (!ret) {
   216			if (sched->phase != ARB_SCHED_PHASE_STOPPING) {
   217				dev_warn(sched->dev, "%s: Stop ACKED when not yielding",
   218					 sched->name);
   219				return;
   220			}
   221	
   222			sched->stop_timer.epoch = sched->epoch;
 > 223			hrtimer_start(&sched->stop_timer.timer,
 > 224				      ms_to_ktime(yield_timeout), HRTIMER_MODE_REL);
   225		}
   226	}
   227	

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