tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 8882572675c1bb1cc544f4e229a11661f1fc52e4 commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 4 weeks ago config: arm-randconfig-s031-20200717 (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-49-g707c5017-dirty git checkout 670d0a4b10704667765f7d18f7592993d02783aa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/xen/grant-table.c:739:15: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void *vaddr @@ got void [noderef] __iomem * @@ drivers/xen/grant-table.c:739:15: sparse: expected void *vaddr drivers/xen/grant-table.c:739:15: sparse: got void [noderef] __iomem * drivers/xen/grant-table.c:747:17: sparse: got void *vaddr drivers/xen/grant-table.c:766:9: sparse: expected void volatile [noderef] __iomem *iomem_cookie drivers/xen/grant-table.c:766:9: sparse: got void *[addressable] [assigned] [toplevel] vaddr vim +747 drivers/xen/grant-table.c ad9a86121f5a374 Jeremy Fitzhardinge 2007-07-17 728 47c542050d306e5 Julien Grall 2014-01-30 729 int gnttab_setup_auto_xlat_frames(phys_addr_t addr) efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 730 { efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 731 xen_pfn_t *pfn; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 732 unsigned int max_nr_gframes = __max_nr_grant_frames(); efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 733 unsigned int i; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 734 void *vaddr; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 735 efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 736 if (xen_auto_xlat_grant_frames.count) efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 737 return -EINVAL; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 738 5ed5451d997f7a8 Julien Grall 2015-05-05 739 vaddr = xen_remap(addr, XEN_PAGE_SIZE * max_nr_gframes); efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 740 if (vaddr == NULL) { 47c542050d306e5 Julien Grall 2014-01-30 741 pr_warn("Failed to ioremap gnttab share frames (addr=%pa)!\n", 47c542050d306e5 Julien Grall 2014-01-30 742 &addr); efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 743 return -ENOMEM; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 744 } efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 745 pfn = kcalloc(max_nr_gframes, sizeof(pfn[0]), GFP_KERNEL); efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 746 if (!pfn) { efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 @747 xen_unmap(vaddr); efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 748 return -ENOMEM; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 749 } efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 750 for (i = 0; i < max_nr_gframes; i++) 5ed5451d997f7a8 Julien Grall 2015-05-05 751 pfn[i] = XEN_PFN_DOWN(addr) + i; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 752 efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 753 xen_auto_xlat_grant_frames.vaddr = vaddr; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 754 xen_auto_xlat_grant_frames.pfn = pfn; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 755 xen_auto_xlat_grant_frames.count = max_nr_gframes; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 756 efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 757 return 0; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 758 } efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 759 EXPORT_SYMBOL_GPL(gnttab_setup_auto_xlat_frames); efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 760 efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 761 void gnttab_free_auto_xlat_frames(void) efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 762 { efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 763 if (!xen_auto_xlat_grant_frames.count) efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 764 return; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 765 kfree(xen_auto_xlat_grant_frames.pfn); efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 @766 xen_unmap(xen_auto_xlat_grant_frames.vaddr); efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 767 efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 768 xen_auto_xlat_grant_frames.pfn = NULL; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 769 xen_auto_xlat_grant_frames.count = 0; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 770 xen_auto_xlat_grant_frames.vaddr = NULL; efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 771 } efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 772 EXPORT_SYMBOL_GPL(gnttab_free_auto_xlat_frames); efaf30a3357872c Konrad Rzeszutek Wilk 2014-01-06 773 :::::: The code at line 747 was first introduced by commit :::::: efaf30a3357872cf0fc7d555b1f9968ec71535d3 xen/grant: Implement an grant frame array struct (v3). :::::: TO: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com&gt; :::::: CC: Konrad Rzeszutek Wilk <konrad.wilk(a)oracle.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org