Hi Chris, [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on v4.10-rc8 next-20170216] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Chris-Wilson/drm-i915-Defer-declaration-of-missed-interrupt-until-the-waiter-is-asleep/20170217-013743 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: x86_64-randconfig-x008-201707 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): drivers/gpu/drm/i915/intel_breadcrumbs.c: In function 'intel_breadcrumbs_hangcheck': >> drivers/gpu/drm/i915/intel_breadcrumbs.c:47:28: error: implicit declaration of function 'wait_timeout' [-Werror=implicit-function-declaration] mod_timer(&b->hangcheck, wait_timeout()); ^~~~~~~~~~~~ drivers/gpu/drm/i915/intel_breadcrumbs.c: At top level: >> drivers/gpu/drm/i915/intel_breadcrumbs.c:67:22: error: conflicting types for 'wait_timeout' static unsigned long wait_timeout(void) ^~~~~~~~~~~~ drivers/gpu/drm/i915/intel_breadcrumbs.c:47:28: note: previous implicit declaration of 'wait_timeout' was here mod_timer(&b->hangcheck, wait_timeout()); ^~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/wait_timeout +47 drivers/gpu/drm/i915/intel_breadcrumbs.c 41 42 /* If the waiter was currently running, assume it hasn't had a chance 43 * to process the pending interupt (e.g, low priority task on a loaded 44 * system) and wait until it sleeps before declaring a missed interrupt. 45 */ 46 if (!intel_engine_wakeup(engine)) { > 47 mod_timer(&b->hangcheck, wait_timeout()); 48 return; 49 } 50 51 DRM_DEBUG("Hangcheck timer elapsed... %s idle\n", engine->name); 52 set_bit(engine->id, &engine->i915->gpu_error.missed_irq_rings); 53 mod_timer(&engine->breadcrumbs.fake_irq, jiffies + 1); 54 55 /* Ensure that even if the GPU hangs, we get woken up. 56 * 57 * However, note that if no one is waiting, we never notice 58 * a gpu hang. Eventually, we will have to wait for a resource 59 * held by the GPU and so trigger a hangcheck. In the most 60 * pathological case, this will be upon memory starvation! To 61 * prevent this, we also queue the hangcheck from the retire 62 * worker. 63 */ 64 i915_queue_hangcheck(engine->i915); 65 } 66 > 67 static unsigned long wait_timeout(void) 68 { 69 return round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES); 70 } --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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