Hi Ranjan, First bad commit (maybe != root cause): tree: https://github.com/intel/linux-intel-lts.git 5.10/preempt-rt head: 2aa7b06beff50959f21350fba872ba5b71380f11 commit: a31b0999302eab96320ef33799d98da09b917a37 [11/15] Merge tag 'lts-v5.10.78-yocto-211124T221321Z' into test-rt config: i386-randconfig-s002-20211214 (https://download.01.org/0day-ci/archive/20211216/202112161100.2frQUouB-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/intel/linux-intel-lts/commit/a31b0999302eab96320ef3379... git remote add intel-lts https://github.com/intel/linux-intel-lts.git git fetch --no-tags intel-lts 5.10/preempt-rt git checkout a31b0999302eab96320ef33799d98da09b917a37 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/gpu/drm/i915/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) -- drivers/gpu/drm/i915/gem/i915_gem_context.c: note: in included file (through drivers/gpu/drm/i915/gt/intel_gt_requests.h, drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c): /usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:406:9: sparse: sparse: preprocessor token offsetof redefined drivers/gpu/drm/i915/gem/i915_gem_context.c: note: in included file (through include/uapi/linux/posix_types.h, include/uapi/linux/types.h, include/linux/types.h, ...): include/linux/stddef.h:17:9: sparse: this was the original definition drivers/gpu/drm/i915/gem/i915_gem_context.c:1411:26: sparse: expected struct i915_gem_engines *e drivers/gpu/drm/i915/gem/i915_gem_context.c:1411:26: sparse: got struct i915_gem_engines [noderef] __rcu *engines drivers/gpu/drm/i915/gem/i915_gem_context.c:1626:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct i915_address_space *vm @@ got struct i915_address_space [noderef] __rcu *vm @@ drivers/gpu/drm/i915/gem/i915_gem_context.c:1626:34: sparse: expected struct i915_address_space *vm drivers/gpu/drm/i915/gem/i915_gem_context.c:1626:34: sparse: got struct i915_address_space [noderef] __rcu *vm drivers/gpu/drm/i915/gem/i915_gem_context.c: note: in included file: drivers/gpu/drm/i915/gem/selftests/mock_context.c:43:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct i915_address_space [noderef] __rcu *vm @@ got struct i915_address_space * @@ drivers/gpu/drm/i915/gem/selftests/mock_context.c:43:25: sparse: expected struct i915_address_space [noderef] __rcu *vm drivers/gpu/drm/i915/gem/selftests/mock_context.c:43:25: sparse: got struct i915_address_space * drivers/gpu/drm/i915/gem/selftests/mock_context.c:60:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct i915_address_space *vm @@ got struct i915_address_space [noderef] __rcu *vm @@ drivers/gpu/drm/i915/gem/selftests/mock_context.c:60:34: sparse: expected struct i915_address_space *vm drivers/gpu/drm/i915/gem/selftests/mock_context.c:60:34: sparse: got struct i915_address_space [noderef] __rcu *vm -- drivers/gpu/drm/i915/gt/iov/intel_iov.c: note: in included file: drivers/gpu/drm/i915/gt/iov/./selftests/iov_live_selftest_ggtt.c:541:13: sparse: expected void *gsm drivers/gpu/drm/i915/gt/iov/./selftests/iov_live_selftest_ggtt.c:541:13: sparse: got void [noderef] __iomem * drivers/gpu/drm/i915/gt/iov/./selftests/iov_live_selftest_ggtt.c:591:13: sparse: expected unsigned long long [noderef] [usertype] __iomem *gsm drivers/gpu/drm/i915/gt/iov/./selftests/iov_live_selftest_ggtt.c:591:13: sparse: got void * vim +608 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 548 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 549 static int 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 550 eb_add_vma(struct i915_execbuffer *eb, 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 551 unsigned int *current_batch, 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 552 unsigned int i, 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 553 struct i915_vma *vma) 2889caa9232109a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-16 554 { 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 555 struct drm_i915_private *i915 = eb->i915; c7c6e46f913bb3a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-08-16 556 struct drm_i915_gem_exec_object2 *entry = &eb->exec[i]; 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 557 struct eb_vma *ev = &eb->vma[i]; 2889caa9232109a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-16 558 93159e12353c2a4 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-23 559 ev->vma = vma; 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 560 ev->exec = entry; 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 561 ev->flags = entry->flags; 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 562 4d470f7359c4bf2 drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-29 563 if (eb->lut_size > 0) { 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 564 ev->handle = entry->handle; 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 565 hlist_add_head(&ev->node, 2889caa9232109a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-16 566 &eb->buckets[hash_32(entry->handle, 2889caa9232109a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-16 567 eb->lut_size)]); 4ff4b44cbb70c26 drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-16 568 } 59bfa1248e22d65 drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2016-08-04 569 2889caa9232109a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-16 570 if (entry->relocation_count) 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 571 list_add_tail(&ev->reloc_link, &eb->relocs); 2889caa9232109a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-16 572 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 573 /* 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 574 * SNA is doing fancy tricks with compressing batch buffers, which leads 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 575 * to negative relocation deltas. Usually that works out ok since the 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 576 * relocate address is still positive, except when the batch is placed 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 577 * very low in the GTT. Ensure this doesn't happen. 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 578 * 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 579 * Note that actual hangs have only been observed on gen7, but for 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 580 * paranoia do it everywhere. 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 581 */ 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 582 if (is_batch_buffer(eb, i)) { 827db9d8bb4a013 drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-21 583 if (entry->relocation_count && 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 584 !(ev->flags & EXEC_OBJECT_PINNED)) 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 585 ev->flags |= __EXEC_OBJECT_NEEDS_BIAS; 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 586 if (eb->reloc_cache.has_fence) 7d6236bb13352c2 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Chris Wilson 2020-03-03 587 ev->flags |= EXEC_OBJECT_NEEDS_FENCE; 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 588 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 589 eb->batches[*current_batch] = ev; 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 590 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 591 if (unlikely(ev->flags & EXEC_OBJECT_WRITE)) { 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 592 drm_dbg(&i915->drm, 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 593 "Attempting to use self-modifying batch buffer\n"); 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 594 return -EINVAL; 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 595 } 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 596 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 597 if (range_overflows_t(u64, 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 598 eb->batch_start_offset, 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 599 eb->args->batch_len, 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 600 ev->vma->size)) { 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 601 drm_dbg(&i915->drm, "Attempting to use out-of-bounds batch\n"); 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 602 return -EINVAL; 746c8f143afad7a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2018-06-10 603 } 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 604 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 605 if (eb->args->batch_len == 0) 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 606 eb->batch_len[*current_batch] = ev->vma->size - 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 607 eb->batch_start_offset; 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 @608 if (unlikely(eb->batch_len == 0)) { /* impossible! */ 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 609 drm_dbg(&i915->drm, "Invalid batch length\n"); 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 610 return -EINVAL; 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 611 } 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 612 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 613 ++*current_batch; 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 614 } 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 615 95eed6488ef2ab6 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c Matthew Brost 2021-08-20 616 return 0; 2889caa9232109a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-16 617 } 2889caa9232109a drivers/gpu/drm/i915/i915_gem_execbuffer.c Chris Wilson 2017-06-16 618 :::::: The code at line 608 was first introduced by commit :::::: 95eed6488ef2ab6d7947630f596a1764cbfa31bc drm/i915: Multi-BB execbuf :::::: TO: Matthew Brost <matthew.brost(a)intel.com&gt; :::::: CC: nanli2x <nanx.li(a)intel.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org