[kbuild-all] [pm:bleeding-edge 102/108] drivers/gpu/drm/xen/xen_drm_front.c:710:42: warning: shift count >= width of type

tree: https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git bleeding-edge head: 7604cba9f860bcae8fd95c907ffee8ebeab73bef commit: f06e8901662d5c5c80f47d1cef6207688ee42e81 [102/108] ACPI: PRM: implement OperationRegion handler for the PlatformRtMechanism subtype config: x86_64-randconfig-a015-20210608 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d2012d965d60c3258b3a69d024491698f8aec386) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/commi... git remote add pm https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git git fetch --no-tags pm bleeding-edge git checkout f06e8901662d5c5c80f47d1cef6207688ee42e81 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/xen/xen_drm_front.c:16: In file included from include/drm/drm_atomic_helper.h:31: In file included from include/drm/drm_crtc.h:28: In file included from include/linux/i2c.h:13: include/linux/acpi.h:135:33: error: field has incomplete type 'struct acpi_prmt_module_header' struct acpi_prmt_module_header prmt; ^ include/linux/acpi.h:135:9: note: forward declaration of 'struct acpi_prmt_module_header' struct acpi_prmt_module_header prmt; ^ ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^ ~~~ 1 warning and 1 error generated. vim +710 drivers/gpu/drm/xen/xen_drm_front.c c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 702 c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 703 static int xen_drv_probe(struct xenbus_device *xb_dev, c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 704 const struct xenbus_device_id *id) c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 705 { c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 706 struct xen_drm_front_info *front_info; c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 707 struct device *dev = &xb_dev->dev; c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 708 int ret; c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 709 ee7f5225dc3cc7 Rob Herring 2019-10-08 @710 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 711 if (ret < 0) { ee7f5225dc3cc7 Rob Herring 2019-10-08 712 DRM_ERROR("Cannot setup DMA mask, ret %d", ret); c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 713 return ret; c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 714 } c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 715 c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 716 front_info = devm_kzalloc(&xb_dev->dev, c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 717 sizeof(*front_info), GFP_KERNEL); c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 718 if (!front_info) c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 719 return -ENOMEM; c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 720 c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 721 front_info->xb_dev = xb_dev; c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 722 spin_lock_init(&front_info->io_lock); c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 723 INIT_LIST_HEAD(&front_info->dbuf_list); c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 724 dev_set_drvdata(&xb_dev->dev, front_info); c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 725 c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 726 return xenbus_switch_state(xb_dev, XenbusStateInitialising); c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 727 } c575b7eeb89f94 Oleksandr Andrushchenko 2018-04-03 728 :::::: The code at line 710 was first introduced by commit :::::: ee7f5225dc3cc7c19df1603597532ff34571f895 xen: Stop abusing DT of_dma_configure API :::::: TO: Rob Herring <robh(a)kernel.org&gt; :::::: CC: Boris Ostrovsky <boris.ostrovsky(a)oracle.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org