[linux-next:master 8563/8895] drivers/hv/vmbus_drv.c:2082:29: warning: shift count >= width of type

[linux-next:master 8563/8895] drivers/hv/vmbus_drv.c:2082:29: warning: shift count >= width of type

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   2850c2311ef4bf30ae8dd8927f0f66b026ff08fb
commit: 743b237c3a7b0f5b44aa704aae8a1058877b6322 [8563/8895] scsi: storvsc: Add Isolation VM support for storvsc driver
config: x86_64-randconfig-r015-20211220 (https://download.01.org/0day-ci/archive/20211222/202112220302.x6d84578-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 6c2bf01270a8a52b7986d5c49eaa7ad1c7083ec5)
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=743b237c3a7b0f5b44aa704aae8a1058877b6322
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 743b237c3a7b0f5b44aa704aae8a1058877b6322
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/hv/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/hv/vmbus_drv.c:2082:29: warning: shift count >= width of type [-Wshift-count-overflow]
   static u64 vmbus_dma_mask = 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 generated.


vim +2082 drivers/hv/vmbus_drv.c

  2081	
> 2082	static u64 vmbus_dma_mask = DMA_BIT_MASK(64);
  2083	/*
  2084	 * vmbus_device_register - Register the child device
  2085	 */
  2086	int vmbus_device_register(struct hv_device *child_device_obj)
  2087	{
  2088		struct kobject *kobj = &child_device_obj->device.kobj;
  2089		int ret;
  2090	
  2091		dev_set_name(&child_device_obj->device, "%pUl",
  2092			     &child_device_obj->channel->offermsg.offer.if_instance);
  2093	
  2094		child_device_obj->device.bus = &hv_bus;
  2095		child_device_obj->device.parent = &hv_acpi_dev->dev;
  2096		child_device_obj->device.release = vmbus_device_release;
  2097	
  2098		/*
  2099		 * Register with the LDM. This will kick off the driver/device
  2100		 * binding...which will eventually call vmbus_match() and vmbus_probe()
  2101		 */
  2102		ret = device_register(&child_device_obj->device);
  2103		if (ret) {
  2104			pr_err("Unable to register child device\n");
  2105			return ret;
  2106		}
  2107	
  2108		child_device_obj->channels_kset = kset_create_and_add("channels",
  2109								      NULL, kobj);
  2110		if (!child_device_obj->channels_kset) {
  2111			ret = -ENOMEM;
  2112			goto err_dev_unregister;
  2113		}
  2114	
  2115		ret = vmbus_add_channel_kobj(child_device_obj,
  2116					     child_device_obj->channel);
  2117		if (ret) {
  2118			pr_err("Unable to register primary channeln");
  2119			goto err_kset_unregister;
  2120		}
  2121		hv_debug_add_dev_dir(child_device_obj);
  2122	
  2123		child_device_obj->device.dma_mask = &vmbus_dma_mask;
  2124		child_device_obj->device.dma_parms = &child_device_obj->dma_parms;
  2125		return 0;
  2126	
  2127	err_kset_unregister:
  2128		kset_unregister(child_device_obj->channels_kset);
  2129	
  2130	err_dev_unregister:
  2131		device_unregister(&child_device_obj->device);
  2132		return ret;
  2133	}
  2134	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org