Hi Chris,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-tip/drm-tip]
[cannot apply to drm-intel/for-linux-next v5.10 next-20201214]
[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]

url:    
https://github.com/0day-ci/linux/commits/Chris-Wilson/drm-i915-Use-cmpxchg64-for-32b-compatilibity/20201214-181222
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: i386-randconfig-s002-20201214 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-184-g1b896707-dirty
        # 
https://github.com/0day-ci/linux/commit/44f806e9c54f1723714820d49dda7beddc38aa1e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review 
Chris-Wilson/drm-i915-Use-cmpxchg64-for-32b-compatilibity/20201214-181222
        git checkout 44f806e9c54f1723714820d49dda7beddc38aa1e
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>


"sparse warnings: (new ones prefixed by >>)"
>> drivers/gpu/drm/i915/gt/intel_execlists_submission.c:1401:37: sparse: 
>> sparse: incorrect type in initializer (different address spaces) @@     
>> expected struct intel_timeline *tl @@     got struct intel_timeline 
>> [noderef] __rcu * @@
   drivers/gpu/drm/i915/gt/intel_execlists_submission.c:1401:37: sparse:     
expected struct intel_timeline *tl
   drivers/gpu/drm/i915/gt/intel_execlists_submission.c:1401:37: sparse:     
got struct intel_timeline [noderef] __rcu *

vim +1401 drivers/gpu/drm/i915/gt/intel_execlists_submission.c

  1396  
  1397  static void
  1398  resubmit_virtual_request(struct i915_request *rq, struct virtual_engine 
*ve)
  1399  {
  1400          struct intel_engine_cs *engine = rq->engine;
> 1401          struct intel_timeline *tl = READ_ONCE(rq->timeline);
  1402          struct i915_request *pos = rq;
  1403  
  1404          spin_lock_irq(&engine->active.lock);
  1405  
  1406          /* Rewind back to the start of this virtual engine queue */
  1407          list_for_each_entry_continue_reverse(rq, &tl->requests, link) {
  1408                  if (i915_request_completed(rq))
  1409                          break;
  1410  
  1411                  pos = rq;
  1412          }
  1413  
  1414          /* Resubmit the queue in execution order */
  1415          spin_lock(&ve->base.active.lock);
  1416          list_for_each_entry_from(pos, &tl->requests, link) {
  1417                  if (pos->engine != engine)
  1418                          break;
  1419  
  1420                  __resubmit_virtual_request(pos, engine, ve);
  1421          }
  1422          spin_unlock(&ve->base.active.lock);
  1423  
  1424          spin_unlock_irq(&engine->active.lock);
  1425  }
  1426  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

Attachment: .config.gz
Description: application/gzip

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