From: kernel test robot <lkp@intel.com>
To: Tianyu Lan <Tianyu.Lan@microsoft.com>
Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org,
linux-kernel@vger.kernel.org, Wei Liu <wei.liu@kernel.org>,
Long Li <longli@microsoft.com>,
Michael Kelley <mikelley@microsoft.com>
Subject: [hyperv:hyperv-next 4/5] drivers/hv/vmbus_drv.c:2082:29: warning: shift count >= width of type
Date: Sat, 18 Dec 2021 18:20:43 +0800 [thread overview]
Message-ID: <202112181827.o3X7GmHz-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git hyperv-next
head: 19fd7ca00201c0525452dcf5a490e4b01674ef4c
commit: 6327882f7b4a476ea902de4bee5657f1028d6859 [4/5] scsi: storvsc: Add Isolation VM support for storvsc driver
config: x86_64-randconfig-a013-20211216 (https://download.01.org/0day-ci/archive/20211218/202112181827.o3X7GmHz-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4c9e31a4814592bbda7153833e46728dc7b21100)
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/hyperv/linux.git/commit/?id=6327882f7b4a476ea902de4bee5657f1028d6859
git remote add hyperv https://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git
git fetch --no-tags hyperv hyperv-next
git checkout 6327882f7b4a476ea902de4bee5657f1028d6859
# 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
next reply other threads:[~2021-12-18 10:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-18 10:20 kernel test robot [this message]
2021-12-19 12:29 ` [hyperv:hyperv-next 4/5] drivers/hv/vmbus_drv.c:2082:29: warning: shift count >= width of type Wei Liu
2021-12-20 16:53 ` Nathan Chancellor
2021-12-20 17:44 ` Wei Liu
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