[kbuild-all] [tytso-ext4:dev 6/13] fs/ext4/super.c:2689:51: sparse: sparse: incorrect type in argument 1 (different address spaces)

tree: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev head: ba2e524d918ab72c0e5edc02354bd6cb43d005f8 commit: e6e268cb682290da29e3c8408493a4474307b8cc [6/13] ext4: move quota configuration out of handle_mount_opt() config: m68k-randconfig-s032-20211210 (https://download.01.org/0day-ci/archive/20211210/202112101722.3Kpomg0h-lk...) compiler: m68k-linux-gcc (GCC) 11.2.0 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: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id... git remote add tytso-ext4 https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git git fetch --no-tags tytso-ext4 dev git checkout e6e268cb682290da29e3c8408493a4474307b8cc # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=m68k SHELL=/bin/bash fs/ext4/ 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 >>) fs/ext4/super.c:2689:51: sparse: expected char const * fs/ext4/super.c:2689:51: sparse: got char [noderef] __rcu * fs/ext4/super.c:2657:38: sparse: expected void const *objp fs/ext4/super.c:2657:38: sparse: got char [noderef] __rcu * vim +2689 fs/ext4/super.c 2642 2643 static void ext4_apply_quota_options(struct fs_context *fc, 2644 struct super_block *sb) 2645 { 2646 #ifdef CONFIG_QUOTA 2647 struct ext4_fs_context *ctx = fc->fs_private; 2648 struct ext4_sb_info *sbi = EXT4_SB(sb); 2649 char *qname; 2650 int i; 2651 2652 for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2653 if (!(ctx->qname_spec & (1 << i))) 2654 continue; 2655 qname = ctx->s_qf_names[i]; /* May be NULL */ 2656 ctx->s_qf_names[i] = NULL; 2658 rcu_assign_pointer(sbi->s_qf_names[i], qname); 2659 set_opt(sb, QUOTA); 2660 } 2661 #endif 2662 } 2663 2664 /* 2665 * Check quota settings consistency. 2666 */ 2667 static int ext4_check_quota_consistency(struct fs_context *fc, 2668 struct super_block *sb) 2669 { 2670 #ifdef CONFIG_QUOTA 2671 struct ext4_fs_context *ctx = fc->fs_private; 2672 struct ext4_sb_info *sbi = EXT4_SB(sb); 2673 bool quota_feature = ext4_has_feature_quota(sb); 2674 bool quota_loaded = sb_any_quota_loaded(sb); 2675 int i; 2676 2677 if (ctx->qname_spec && quota_loaded) { 2678 if (quota_feature) 2679 goto err_feature; 2680 2681 for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2682 if (!(ctx->qname_spec & (1 << i))) 2683 continue; 2684 2685 if (!!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2686 goto err_jquota_change; 2687 2688 if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 2690 ctx->s_qf_names[i]) != 0) 2691 goto err_jquota_specified; 2692 } 2693 } 2694 2695 if (ctx->s_jquota_fmt) { 2696 if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 2697 goto err_quota_change; 2698 if (quota_feature) { 2699 ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2700 "ignored when QUOTA feature is enabled"); 2701 return 0; 2702 } 2703 } 2704 return 0; 2705 2706 err_quota_change: 2707 ext4_msg(NULL, KERN_ERR, 2708 "Cannot change quota options when quota turned on"); 2709 return -EINVAL; 2710 err_jquota_change: 2711 ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2712 "options when quota turned on"); 2713 return -EINVAL; 2714 err_jquota_specified: 2715 ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2716 QTYPE2NAME(i)); 2717 return -EINVAL; 2718 err_feature: 2719 ext4_msg(NULL, KERN_ERR, "Journaled quota options ignored " 2720 "when QUOTA feature is enabled"); 2721 return 0; 2722 #else 2723 return 0; 2724 #endif 2725 } 2726 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org