Hi Jason, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on drm-intel/for-linux-next] [also build test WARNING on drm-tip/drm-tip drm-exynos/exynos-drm-next next-20210503] [cannot apply to tegra-drm/drm/tegra/for-next drm/drm-next v5.12] [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/Jason-Ekstrand/drm-i915-gem-ioctl-clean-ups-v5/20210504-000132 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: i386-randconfig-s002-20210503 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/6af12f5ca765ecd59075344f3be4c4c0b68ef95e git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jason-Ekstrand/drm-i915-gem-ioctl-clean-ups-v5/20210504-000132 git checkout 6af12f5ca765ecd59075344f3be4c4c0b68ef95e # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) drivers/gpu/drm/i915/gt/intel_reset.c:1329:5: sparse: sparse: context imbalance in 'intel_gt_reset_trylock' - different lock contexts for basic block drivers/gpu/drm/i915/gt/intel_reset.c: note: in included file: >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: sparse: incompatible types in comparison expression (different address spaces): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space [noderef] __rcu * >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space * -- drivers/gpu/drm/i915/gt/intel_execlists_submission.c: note: in included file (through drivers/gpu/drm/i915/selftests/igt_spinner.h, drivers/gpu/drm/i915/gt/selftest_execlists.c): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: sparse: incompatible types in comparison expression (different address spaces): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space [noderef] __rcu * >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space * -- drivers/gpu/drm/i915/gem/i915_gem_object.c: note: in included file: >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: sparse: incompatible types in comparison expression (different address spaces): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space [noderef] __rcu * >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space * >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: sparse: incompatible types in comparison expression (different address spaces): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space [noderef] __rcu * >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space * drivers/gpu/drm/i915/gem/i915_gem_context.h:154:16: sparse: sparse: incompatible types in comparison expression (different address spaces): drivers/gpu/drm/i915/gem/i915_gem_context.h:154:16: sparse: struct i915_address_space [noderef] __rcu * drivers/gpu/drm/i915/gem/i915_gem_context.h:154:16: sparse: struct i915_address_space * -- drivers/gpu/drm/i915/i915_gem_gtt.c: note: in included file (through drivers/gpu/drm/i915/selftests/i915_gem_gtt.c): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: sparse: incompatible types in comparison expression (different address spaces): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space [noderef] __rcu * >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space * >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: sparse: incompatible types in comparison expression (different address spaces): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space [noderef] __rcu * >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space * -- drivers/gpu/drm/i915/i915_vma.c: note: in included file: >> drivers/gpu/drm/i915/selftests/i915_vma.c:42:24: sparse: sparse: incompatible types in comparison expression (different address spaces): >> drivers/gpu/drm/i915/selftests/i915_vma.c:42:24: sparse: struct i915_address_space [noderef] __rcu * >> drivers/gpu/drm/i915/selftests/i915_vma.c:42:24: sparse: struct i915_address_space * drivers/gpu/drm/i915/i915_vma.c: note: in included file (through drivers/gpu/drm/i915/selftests/i915_vma.c): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: sparse: incompatible types in comparison expression (different address spaces): >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space [noderef] __rcu * >> drivers/gpu/drm/i915/gem/i915_gem_context.h:163:14: sparse: struct i915_address_space * vim +163 drivers/gpu/drm/i915/gem/i915_gem_context.h a4e7ccdac38ec8 Chris Wilson 2019-10-04 156 a4e7ccdac38ec8 Chris Wilson 2019-10-04 157 static inline struct i915_address_space * a4e7ccdac38ec8 Chris Wilson 2019-10-04 158 i915_gem_context_get_vm_rcu(struct i915_gem_context *ctx) a4e7ccdac38ec8 Chris Wilson 2019-10-04 159 { a4e7ccdac38ec8 Chris Wilson 2019-10-04 160 struct i915_address_space *vm; a4e7ccdac38ec8 Chris Wilson 2019-10-04 161 a4e7ccdac38ec8 Chris Wilson 2019-10-04 162 rcu_read_lock(); a4e7ccdac38ec8 Chris Wilson 2019-10-04 @163 vm = rcu_dereference(ctx->vm); a4e7ccdac38ec8 Chris Wilson 2019-10-04 164 if (!vm) a4e7ccdac38ec8 Chris Wilson 2019-10-04 165 vm = &ctx->i915->ggtt.vm; a4e7ccdac38ec8 Chris Wilson 2019-10-04 166 vm = i915_vm_get(vm); a4e7ccdac38ec8 Chris Wilson 2019-10-04 167 rcu_read_unlock(); a4e7ccdac38ec8 Chris Wilson 2019-10-04 168 a4e7ccdac38ec8 Chris Wilson 2019-10-04 169 return vm; a4e7ccdac38ec8 Chris Wilson 2019-10-04 170 } a4e7ccdac38ec8 Chris Wilson 2019-10-04 171 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org