Hi Dan, FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant. tree: https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git libnvdimm-pending head: e27a0356de15f16934325784c6b1d89cf0f13458 commit: 155ac6b670cf6385f6dd14910560d569560af889 [16/22] devdax: Move address_space helpers to the DAX core config: x86_64-randconfig-a015 (https://download.01.org/0day-ci/archive/20220914/202209141710.pI0d0v9N-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-5) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git/commit/?id=155ac6b670cf6385f6dd14910560d569560af889 git remote add djbw-nvdimm https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git git fetch --no-tags djbw-nvdimm libnvdimm-pending git checkout 155ac6b670cf6385f6dd14910560d569560af889 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> drivers/dax/mapping.c:646: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * Return NULL if the entry is zapped and all pages in the entry are vim +646 drivers/dax/mapping.c 644 645 /** > 646 * Return NULL if the entry is zapped and all pages in the entry are 647 * idle, otherwise return the non-idle page in the entry 648 */ 649 static struct page *dax_zap_pages(struct xa_state *xas, void *entry) 650 { 651 struct page *ret = NULL; 652 unsigned long pfn; 653 bool zap; 654 655 if (!dax_entry_size(entry)) 656 return NULL; 657 658 zap = !dax_is_zapped(entry); 659 660 for_each_mapped_pfn(entry, pfn) { 661 struct page *page = pfn_to_page(pfn); 662 663 if (zap) 664 page_ref_dec(page); 665 666 if (!ret && !dax_page_idle(page)) 667 ret = page; 668 } 669 670 if (zap) 671 dax_zap_entry(xas, entry); 672 673 return ret; 674 } 675 -- 0-DAY CI Kernel Test Service https://01.org/lkp
