Hi wangfushuai, kernel test robot noticed the following build warnings: [auto build test WARNING on brauner-vfs/vfs.all] [also build test WARNING on akpm-mm/mm-everything linus/master v6.15 next-20250606] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/wangfushuai/fs-proc-task_mmu-add-VM_SHADOW_STACK-for-arm64-when-support-GCS/20250607-141047 base: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git vfs.all patch link: https://lore.kernel.org/r/20250607060741.69902-1-wangfushuai%40baidu.com patch subject: [PATCH] fs/proc/task_mmu: add VM_SHADOW_STACK for arm64 when support GCS config: x86_64-buildonly-randconfig-001-20250607 (https://download.01.org/0day-ci/archive/20250607/202506071806.mshFK42h-lkp@xxxxxxxxx/config) compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247) rustc: rustc 1.78.0 (9b00956e5 2024-04-29) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250607/202506071806.mshFK42h-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202506071806.mshFK42h-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> fs/proc/task_mmu.c:994:42: warning: extra tokens at end of #ifdef directive [-Wextra-tokens] 994 | #ifdef CONFIG_ARCH_HAS_USER_SHADOW_STACK || defined(CONFIG_ARM64_GCS) | ^ | // 1 warning generated. vim +994 fs/proc/task_mmu.c 920 921 static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma) 922 { 923 /* 924 * Don't forget to update Documentation/ on changes. 925 * 926 * The length of the second argument of mnemonics[] 927 * needs to be 3 instead of previously set 2 928 * (i.e. from [BITS_PER_LONG][2] to [BITS_PER_LONG][3]) 929 * to avoid spurious 930 * -Werror=unterminated-string-initialization warning 931 * with GCC 15 932 */ 933 static const char mnemonics[BITS_PER_LONG][3] = { 934 /* 935 * In case if we meet a flag we don't know about. 936 */ 937 [0 ... (BITS_PER_LONG-1)] = "??", 938 939 [ilog2(VM_READ)] = "rd", 940 [ilog2(VM_WRITE)] = "wr", 941 [ilog2(VM_EXEC)] = "ex", 942 [ilog2(VM_SHARED)] = "sh", 943 [ilog2(VM_MAYREAD)] = "mr", 944 [ilog2(VM_MAYWRITE)] = "mw", 945 [ilog2(VM_MAYEXEC)] = "me", 946 [ilog2(VM_MAYSHARE)] = "ms", 947 [ilog2(VM_GROWSDOWN)] = "gd", 948 [ilog2(VM_PFNMAP)] = "pf", 949 [ilog2(VM_LOCKED)] = "lo", 950 [ilog2(VM_IO)] = "io", 951 [ilog2(VM_SEQ_READ)] = "sr", 952 [ilog2(VM_RAND_READ)] = "rr", 953 [ilog2(VM_DONTCOPY)] = "dc", 954 [ilog2(VM_DONTEXPAND)] = "de", 955 [ilog2(VM_LOCKONFAULT)] = "lf", 956 [ilog2(VM_ACCOUNT)] = "ac", 957 [ilog2(VM_NORESERVE)] = "nr", 958 [ilog2(VM_HUGETLB)] = "ht", 959 [ilog2(VM_SYNC)] = "sf", 960 [ilog2(VM_ARCH_1)] = "ar", 961 [ilog2(VM_WIPEONFORK)] = "wf", 962 [ilog2(VM_DONTDUMP)] = "dd", 963 #ifdef CONFIG_ARM64_BTI 964 [ilog2(VM_ARM64_BTI)] = "bt", 965 #endif 966 #ifdef CONFIG_MEM_SOFT_DIRTY 967 [ilog2(VM_SOFTDIRTY)] = "sd", 968 #endif 969 [ilog2(VM_MIXEDMAP)] = "mm", 970 [ilog2(VM_HUGEPAGE)] = "hg", 971 [ilog2(VM_NOHUGEPAGE)] = "nh", 972 [ilog2(VM_MERGEABLE)] = "mg", 973 [ilog2(VM_UFFD_MISSING)]= "um", 974 [ilog2(VM_UFFD_WP)] = "uw", 975 #ifdef CONFIG_ARM64_MTE 976 [ilog2(VM_MTE)] = "mt", 977 [ilog2(VM_MTE_ALLOWED)] = "", 978 #endif 979 #ifdef CONFIG_ARCH_HAS_PKEYS 980 /* These come out via ProtectionKey: */ 981 [ilog2(VM_PKEY_BIT0)] = "", 982 [ilog2(VM_PKEY_BIT1)] = "", 983 [ilog2(VM_PKEY_BIT2)] = "", 984 #if VM_PKEY_BIT3 985 [ilog2(VM_PKEY_BIT3)] = "", 986 #endif 987 #if VM_PKEY_BIT4 988 [ilog2(VM_PKEY_BIT4)] = "", 989 #endif 990 #endif /* CONFIG_ARCH_HAS_PKEYS */ 991 #ifdef CONFIG_HAVE_ARCH_USERFAULTFD_MINOR 992 [ilog2(VM_UFFD_MINOR)] = "ui", 993 #endif /* CONFIG_HAVE_ARCH_USERFAULTFD_MINOR */ > 994 #ifdef CONFIG_ARCH_HAS_USER_SHADOW_STACK || defined(CONFIG_ARM64_GCS) 995 [ilog2(VM_SHADOW_STACK)] = "ss", 996 #endif 997 #if defined(CONFIG_64BIT) || defined(CONFIG_PPC32) 998 [ilog2(VM_DROPPABLE)] = "dp", 999 #endif 1000 #ifdef CONFIG_64BIT 1001 [ilog2(VM_SEALED)] = "sl", 1002 #endif 1003 }; 1004 size_t i; 1005 1006 seq_puts(m, "VmFlags: "); 1007 for (i = 0; i < BITS_PER_LONG; i++) { 1008 if (!mnemonics[i][0]) 1009 continue; 1010 if (vma->vm_flags & (1UL << i)) 1011 seq_printf(m, "%s ", mnemonics[i]); 1012 } 1013 seq_putc(m, '\n'); 1014 } 1015 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
