tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 07a56bb875afbe39dabbf6ba7b83783d166863db commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 4 weeks ago config: arc-randconfig-s032-20200717 (attached as .config) compiler: arc-elf-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=arc 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/video/fbdev/aty/atyfb_base.c:3715:37: sparse: got unsigned char [usertype] *addr -- sound/pci/echoaudio/echoaudio.c:1824:21: sparse: got unsigned int volatile [noderef] [usertype] __iomem *dsp_registers vim +3715 drivers/video/fbdev/aty/atyfb_base.c c98959f566e0c6 drivers/video/aty/atyfb_base.c Ville Syrjala 2006-12-08 3691 48c68c4f1b5424 drivers/video/aty/atyfb_base.c Greg Kroah-Hartman 2012-12-21 3692 static void atyfb_remove(struct fb_info *info) ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3693 { ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3694 struct atyfb_par *par = (struct atyfb_par *) info->par; ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3695 ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3696 /* restore video mode */ eafad22a05fdac drivers/video/aty/atyfb_base.c Ville Syrjala 2009-06-30 3697 aty_set_crtc(par, &par->saved_crtc); eafad22a05fdac drivers/video/aty/atyfb_base.c Ville Syrjala 2009-06-30 3698 par->pll_ops->set_pll(info, &par->saved_pll); ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3699 37ce69a57ff217 drivers/video/aty/atyfb_base.c Richard Purdie 2007-02-10 3700 unregister_framebuffer(info); 37ce69a57ff217 drivers/video/aty/atyfb_base.c Richard Purdie 2007-02-10 3701 5474c120aafe78 drivers/video/aty/atyfb_base.c Michael Hanselmann 2006-06-25 3702 #ifdef CONFIG_FB_ATY_BACKLIGHT 5474c120aafe78 drivers/video/aty/atyfb_base.c Michael Hanselmann 2006-06-25 3703 if (M64_HAS(MOBIL_BUS)) 37ce69a57ff217 drivers/video/aty/atyfb_base.c Richard Purdie 2007-02-10 3704 aty_bl_exit(info->bl_dev); 5474c120aafe78 drivers/video/aty/atyfb_base.c Michael Hanselmann 2006-06-25 3705 #endif 7d89a3cb159aec drivers/video/fbdev/aty/atyfb_base.c Luis R. Rodriguez 2015-07-09 3706 arch_phys_wc_del(par->wc_cookie); 5474c120aafe78 drivers/video/aty/atyfb_base.c Michael Hanselmann 2006-06-25 3707 ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3708 #ifndef __sparc__ ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3709 if (par->ati_regbase) ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3710 iounmap(par->ati_regbase); ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3711 if (info->screen_base) ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3712 iounmap(info->screen_base); ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3713 #ifdef __BIG_ENDIAN ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3714 if (info->sprite.addr) ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 @3715 iounmap(info->sprite.addr); ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3716 #endif ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3717 #endif ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3718 #ifdef __sparc__ ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3719 kfree(par->mmap_map); ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3720 #endif ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3721 if (par->aux_start) ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3722 release_mem_region(par->aux_start, par->aux_size); ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3723 ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3724 if (par->res_start) ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3725 release_mem_region(par->res_start, par->res_size); ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3726 ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3727 framebuffer_release(info); ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3728 } ^1da177e4c3f41 drivers/video/aty/atyfb_base.c Linus Torvalds 2005-04-16 3729 :::::: The code at line 3715 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org