tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: f30a24ed97b401416118756fa35fbe5d28f999e3 commit: c9deaee814e738981ed06a444ccbe50b4ff1526a [3430/3897] device-dax: set mapping prior to vmf_insert_pfn{,_pmd,pud}() config: x86_64-randconfig-a013-20211123 (https://download.01.org/0day-ci/archive/20211126/202111262232.JAaX7CBA-lkp@xxxxxxxxx/config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c45def8a75061203461ab0060c75c864df1c) 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=c9deaee814e738981ed06a444ccbe50b4ff1526a 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 c9deaee814e738981ed06a444ccbe50b4ff1526a # save the config file to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/dax/device.c:226:16: warning: variable 'fault_size' set but not used [-Wunused-but-set-variable] unsigned long fault_size; ^ drivers/dax/device.c:396:5: warning: no previous prototype for function 'dev_dax_probe' [-Wmissing-prototypes] int dev_dax_probe(struct dev_dax *dev_dax) ^ drivers/dax/device.c:396:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int dev_dax_probe(struct dev_dax *dev_dax) ^ static 2 warnings generated. vim +/fault_size +226 drivers/dax/device.c 9557feee39b75ce drivers/dax/dax.c Dave Jiang 2017-02-24 221 226ab561075f6f8 drivers/dax/device.c Dan Williams 2018-07-13 222 static vm_fault_t dev_dax_huge_fault(struct vm_fault *vmf, c791ace1e747371 drivers/dax/dax.c Dave Jiang 2017-02-24 223 enum page_entry_size pe_size) dee410792419aaa drivers/dax/dax.c Dan Williams 2016-05-14 224 { f42003917b4569a drivers/dax/dax.c Dave Jiang 2017-02-22 225 struct file *filp = vmf->vma->vm_file; 2232c6382a453db drivers/dax/device.c Dan Williams 2018-07-13 @226 unsigned long fault_size; 36bdac1e674debd drivers/dax/device.c Souptick Joarder 2018-09-04 227 vm_fault_t rc = VM_FAULT_SIGBUS; 36bdac1e674debd drivers/dax/device.c Souptick Joarder 2018-09-04 228 int id; 2232c6382a453db drivers/dax/device.c Dan Williams 2018-07-13 229 pfn_t pfn; 5f0694b300b9fb8 drivers/dax/dax.c Dan Williams 2017-01-30 230 struct dev_dax *dev_dax = filp->private_data; dee410792419aaa drivers/dax/dax.c Dan Williams 2016-05-14 231 6daaca522ab464d drivers/dax/device.c Dan Williams 2018-03-05 232 dev_dbg(&dev_dax->dev, "%s: %s (%#lx - %#lx) size = %d\n", current->comm, 6daaca522ab464d drivers/dax/device.c Dan Williams 2018-03-05 233 (vmf->flags & FAULT_FLAG_WRITE) ? "write" : "read", 762026203c0b87b drivers/dax/dax.c Oliver O'Halloran 2017-04-12 234 vmf->vma->vm_start, vmf->vma->vm_end, pe_size); dee410792419aaa drivers/dax/dax.c Dan Williams 2016-05-14 235 7b6be8444e0f0dd drivers/dax/device.c Dan Williams 2017-04-11 236 id = dax_read_lock(); c791ace1e747371 drivers/dax/dax.c Dave Jiang 2017-02-24 237 switch (pe_size) { c791ace1e747371 drivers/dax/dax.c Dave Jiang 2017-02-24 238 case PE_SIZE_PTE: 2232c6382a453db drivers/dax/device.c Dan Williams 2018-07-13 239 fault_size = PAGE_SIZE; 2232c6382a453db drivers/dax/device.c Dan Williams 2018-07-13 240 rc = __dev_dax_pte_fault(dev_dax, vmf, &pfn); a2d581675d485eb drivers/dax/dax.c Dave Jiang 2017-02-24 241 break; c791ace1e747371 drivers/dax/dax.c Dave Jiang 2017-02-24 242 case PE_SIZE_PMD: 2232c6382a453db drivers/dax/device.c Dan Williams 2018-07-13 243 fault_size = PMD_SIZE; 2232c6382a453db drivers/dax/device.c Dan Williams 2018-07-13 244 rc = __dev_dax_pmd_fault(dev_dax, vmf, &pfn); 9557feee39b75ce drivers/dax/dax.c Dave Jiang 2017-02-24 245 break; c791ace1e747371 drivers/dax/dax.c Dave Jiang 2017-02-24 246 case PE_SIZE_PUD: 2232c6382a453db drivers/dax/device.c Dan Williams 2018-07-13 247 fault_size = PUD_SIZE; 2232c6382a453db drivers/dax/device.c Dan Williams 2018-07-13 248 rc = __dev_dax_pud_fault(dev_dax, vmf, &pfn); a2d581675d485eb drivers/dax/dax.c Dave Jiang 2017-02-24 249 break; a2d581675d485eb drivers/dax/dax.c Dave Jiang 2017-02-24 250 default: 54eafcc9e339aff drivers/dax/dax.c Pushkar Jambhlekar 2017-04-11 251 rc = VM_FAULT_SIGBUS; a2d581675d485eb drivers/dax/dax.c Dave Jiang 2017-02-24 252 } 2232c6382a453db drivers/dax/device.c Dan Williams 2018-07-13 253 7b6be8444e0f0dd drivers/dax/device.c Dan Williams 2017-04-11 254 dax_read_unlock(id); dee410792419aaa drivers/dax/dax.c Dan Williams 2016-05-14 255 dee410792419aaa drivers/dax/dax.c Dan Williams 2016-05-14 256 return rc; dee410792419aaa drivers/dax/dax.c Dan Williams 2016-05-14 257 } dee410792419aaa drivers/dax/dax.c Dan Williams 2016-05-14 258 :::::: The code at line 226 was first introduced by commit :::::: 2232c6382a453db73d2e723df1b52030066e135e device-dax: Enable page_mapping() :::::: TO: Dan Williams <dan.j.williams@xxxxxxxxx> :::::: CC: Dave Jiang <dave.jiang@xxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
