tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 3a00d3dfd4b68b208ecd5405e676d06c8ad6bb63 commit: 7ad229c3dd07d91e827d59d3c2fc1ac7918e8634 [2810/2998] device-dax: make align a per-device property config: i386-randconfig-s002-20200825 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-191-g10164920-dirty git checkout 7ad229c3dd07d91e827d59d3c2fc1ac7918e8634 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 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: In function '__dev_dax_pmd_fault': >> drivers/dax/device.c:111:21: warning: variable 'dax_region' set but not used [-Wunused-but-set-variable] 111 | struct dax_region *dax_region; | ^~~~~~~~~~ drivers/dax/device.c: At top level: drivers/dax/device.c:395:5: warning: no previous prototype for 'dev_dax_probe' [-Wmissing-prototypes] 395 | int dev_dax_probe(struct dev_dax *dev_dax) | ^~~~~~~~~~~~~ # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=7ad229c3dd07d91e827d59d3c2fc1ac7918e8634 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 7ad229c3dd07d91e827d59d3c2fc1ac7918e8634 vim +/dax_region +111 drivers/dax/device.c dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 105 226ab561075f6f drivers/dax/device.c Dan Williams 2018-07-13 106 static vm_fault_t __dev_dax_pmd_fault(struct dev_dax *dev_dax, 2232c6382a453d drivers/dax/device.c Dan Williams 2018-07-13 107 struct vm_fault *vmf, pfn_t *pfn) dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 108 { d8a849e1bc1237 drivers/dax/dax.c Dave Jiang 2017-02-22 109 unsigned long pmd_addr = vmf->address & PMD_MASK; 5f0694b300b9fb drivers/dax/dax.c Dan Williams 2017-01-30 110 struct device *dev = &dev_dax->dev; dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 @111 struct dax_region *dax_region; dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 112 phys_addr_t phys; dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 113 pgoff_t pgoff; 0134ed4fb9e786 drivers/dax/dax.c Dave Jiang 2017-03-10 114 unsigned int fault_size = PMD_SIZE; dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 115 5f0694b300b9fb drivers/dax/dax.c Dan Williams 2017-01-30 116 if (check_vma(dev_dax, vmf->vma, __func__)) dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 117 return VM_FAULT_SIGBUS; dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 118 5f0694b300b9fb drivers/dax/dax.c Dan Williams 2017-01-30 119 dax_region = dev_dax->region; 7ad229c3dd07d9 drivers/dax/device.c Joao Martins 2020-08-25 120 if (dev_dax->align > PMD_SIZE) { 6daaca522ab464 drivers/dax/device.c Dan Williams 2018-03-05 121 dev_dbg(dev, "alignment (%#x) > fault size (%#x)\n", 7ad229c3dd07d9 drivers/dax/device.c Joao Martins 2020-08-25 122 dev_dax->align, fault_size); dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 123 return VM_FAULT_SIGBUS; dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 124 } dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 125 7ad229c3dd07d9 drivers/dax/device.c Joao Martins 2020-08-25 126 if (fault_size < dev_dax->align) 0134ed4fb9e786 drivers/dax/dax.c Dave Jiang 2017-03-10 127 return VM_FAULT_SIGBUS; 7ad229c3dd07d9 drivers/dax/device.c Joao Martins 2020-08-25 128 else if (fault_size > dev_dax->align) 0134ed4fb9e786 drivers/dax/dax.c Dave Jiang 2017-03-10 129 return VM_FAULT_FALLBACK; 0134ed4fb9e786 drivers/dax/dax.c Dave Jiang 2017-03-10 130 0134ed4fb9e786 drivers/dax/dax.c Dave Jiang 2017-03-10 131 /* if we are outside of the VMA */ 0134ed4fb9e786 drivers/dax/dax.c Dave Jiang 2017-03-10 132 if (pmd_addr < vmf->vma->vm_start || 0134ed4fb9e786 drivers/dax/dax.c Dave Jiang 2017-03-10 133 (pmd_addr + PMD_SIZE) > vmf->vma->vm_end) 0134ed4fb9e786 drivers/dax/dax.c Dave Jiang 2017-03-10 134 return VM_FAULT_SIGBUS; 0134ed4fb9e786 drivers/dax/dax.c Dave Jiang 2017-03-10 135 f42003917b4569 drivers/dax/dax.c Dave Jiang 2017-02-22 136 pgoff = linear_page_index(vmf->vma, pmd_addr); 736163671bcb16 drivers/dax/device.c Dan Williams 2017-05-04 137 phys = dax_pgoff_to_phys(dev_dax, pgoff, PMD_SIZE); dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 138 if (phys == -1) { 6daaca522ab464 drivers/dax/device.c Dan Williams 2018-03-05 139 dev_dbg(dev, "pgoff_to_phys(%#lx) failed\n", pgoff); dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 140 return VM_FAULT_SIGBUS; dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 141 } dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 142 79541c848bbd09 drivers/dax/device.c Dan Williams 2020-08-25 143 *pfn = phys_to_pfn_t(phys, PFN_DEV|PFN_MAP); dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 144 fce86ff5802bac drivers/dax/device.c Dan Williams 2019-05-13 145 return vmf_insert_pfn_pmd(vmf, *pfn, vmf->flags & FAULT_FLAG_WRITE); dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 146 } dee410792419aa drivers/dax/dax.c Dan Williams 2016-05-14 147 :::::: The code at line 111 was first introduced by commit :::::: dee410792419aaa8bc3e3b35d2ccb6515835916d /dev/dax, core: file operations and dax-mmap :::::: TO: Dan Williams <dan.j.williams@xxxxxxxxx> :::::: CC: Dan Williams <dan.j.williams@xxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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