Hi Abdiel, 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 next-20191210] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Abdiel-Janulgue/drm-i915-Add-lmem-fault-handler/20191212-031235 base: git://anongit.freedesktop.org/drm-intel for-linux-next If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> smatch warnings: drivers/gpu/drm/i915/gem/i915_gem_lmem.c:40 vm_fault_lmem() error: uninitialized symbol 'vmf_ret'. # https://github.com/0day-ci/linux/commit/527bcb2414222221b5b3cea4909756095ae07d6a git remote add linux-review https://github.com/0day-ci/linux git remote update linux-review git checkout 527bcb2414222221b5b3cea4909756095ae07d6a vim +/vmf_ret +40 drivers/gpu/drm/i915/gem/i915_gem_lmem.c 527bcb24142222 Abdiel Janulgue 2019-12-11 12 vm_fault_t vm_fault_lmem(struct vm_fault *vmf) 527bcb24142222 Abdiel Janulgue 2019-12-11 13 { 527bcb24142222 Abdiel Janulgue 2019-12-11 14 struct vm_area_struct *area = vmf->vma; 527bcb24142222 Abdiel Janulgue 2019-12-11 15 struct i915_mmap_offset *priv = area->vm_private_data; 527bcb24142222 Abdiel Janulgue 2019-12-11 16 struct drm_i915_gem_object *obj = priv->obj; 527bcb24142222 Abdiel Janulgue 2019-12-11 17 unsigned long size = area->vm_end - area->vm_start; 527bcb24142222 Abdiel Janulgue 2019-12-11 18 bool write = area->vm_flags & VM_WRITE; 527bcb24142222 Abdiel Janulgue 2019-12-11 19 vm_fault_t vmf_ret; ^^^^^^^^^^^^^^^^^^^ 527bcb24142222 Abdiel Janulgue 2019-12-11 20 int i, ret; 527bcb24142222 Abdiel Janulgue 2019-12-11 21 527bcb24142222 Abdiel Janulgue 2019-12-11 22 /* Sanity check that we allow writing into this object */ 527bcb24142222 Abdiel Janulgue 2019-12-11 23 if (i915_gem_object_is_readonly(obj) && write) 527bcb24142222 Abdiel Janulgue 2019-12-11 24 return VM_FAULT_SIGBUS; 527bcb24142222 Abdiel Janulgue 2019-12-11 25 527bcb24142222 Abdiel Janulgue 2019-12-11 26 ret = i915_gem_object_pin_pages(obj); 527bcb24142222 Abdiel Janulgue 2019-12-11 27 if (ret) 527bcb24142222 Abdiel Janulgue 2019-12-11 28 return i915_error_to_vmf_fault(ret); 527bcb24142222 Abdiel Janulgue 2019-12-11 29 527bcb24142222 Abdiel Janulgue 2019-12-11 30 for (i = 0; i < size >> PAGE_SHIFT; i++) { Can size be less than a page? 527bcb24142222 Abdiel Janulgue 2019-12-11 31 vmf_ret = vmf_insert_pfn(area, 527bcb24142222 Abdiel Janulgue 2019-12-11 32 (unsigned long)area->vm_start + i * PAGE_SIZE, 527bcb24142222 Abdiel Janulgue 2019-12-11 33 i915_gem_object_lmem_io_pfn(obj, i)); 527bcb24142222 Abdiel Janulgue 2019-12-11 34 if (vmf_ret != VM_FAULT_NOPAGE) 527bcb24142222 Abdiel Janulgue 2019-12-11 35 break; 527bcb24142222 Abdiel Janulgue 2019-12-11 36 } 527bcb24142222 Abdiel Janulgue 2019-12-11 37 527bcb24142222 Abdiel Janulgue 2019-12-11 38 i915_gem_object_unpin_pages(obj); 527bcb24142222 Abdiel Janulgue 2019-12-11 39 527bcb24142222 Abdiel Janulgue 2019-12-11 @40 return vmf_ret; 527bcb24142222 Abdiel Janulgue 2019-12-11 41 } --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Intel Corporation _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
