tree: https://github.com/rhvgoyal/linux virtiofs-dax-5.8 head: b779919ca8c764c6664523cba2f8dc7fdb4b29d8 commit: 2166ed84f03139e5d48f07fc7de570c9188cbff9 [10/20] fuse,virtiofs: Keep a list of free dax memory ranges config: microblaze-randconfig-r012-20200717 (attached as .config) compiler: microblaze-linux-gcc (GCC) 9.3.0 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 git checkout 2166ed84f03139e5d48f07fc7de570c9188cbff9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze 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 >>): fs/fuse/inode.c: In function 'fuse_dax_mem_range_init': 632 | phys_addr_t phys_addr; | ^~~~~~~~~ vim +/phys_addr +632 fs/fuse/inode.c 622 623 #ifdef CONFIG_FS_DAX 624 static int fuse_dax_mem_range_init(struct fuse_conn *fc, 625 struct dax_device *dax_dev) 626 { 627 long nr_pages, nr_ranges; 628 void *kaddr; 629 pfn_t pfn; 630 struct fuse_dax_mapping *range; 631 LIST_HEAD(mem_ranges); 633 int ret = 0, id; 634 size_t dax_size = -1; 635 unsigned long i; 636 637 id = dax_read_lock(); 638 nr_pages = dax_direct_access(dax_dev, 0, PHYS_PFN(dax_size), &kaddr, 639 &pfn); 640 dax_read_unlock(id); 641 if (nr_pages < 0) { 642 pr_debug("dax_direct_access() returned %ld\n", nr_pages); 643 return nr_pages; 644 } 645 646 phys_addr = pfn_t_to_phys(pfn); 647 nr_ranges = nr_pages/FUSE_DAX_MEM_RANGE_PAGES; 648 printk("fuse_dax_mem_range_init(): dax mapped %ld pages. nr_ranges=%ld\n", nr_pages, nr_ranges); 649 650 for (i = 0; i < nr_ranges; i++) { 651 range = kzalloc(sizeof(struct fuse_dax_mapping), GFP_KERNEL); 652 if (!range) { 653 pr_debug("memory allocation for mem_range failed.\n"); 654 ret = -ENOMEM; 655 goto out_err; 656 } 657 /* TODO: This offset only works if virtio-fs driver is not 658 * having some memory hidden at the beginning. This needs 659 * better handling 660 */ 661 range->window_offset = i * FUSE_DAX_MEM_RANGE_SZ; 662 range->length = FUSE_DAX_MEM_RANGE_SZ; 663 list_add_tail(&range->list, &mem_ranges); 664 } 665 666 list_replace_init(&mem_ranges, &fc->free_ranges); 667 fc->nr_free_ranges = nr_ranges; 668 return 0; 669 out_err: 670 /* Free All allocated elements */ 671 fuse_free_dax_mem_ranges(&mem_ranges); 672 return ret; 673 } 674 #else /* !CONFIG_FS_DAX */ 675 static inline int fuse_dax_mem_range_init(struct fuse_conn *fc, 676 struct dax_device *dax_dev) 677 { 678 return 0; 679 } 680 #endif /* CONFIG_FS_DAX */ 681 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org