tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9b57f458985742bd1c585f4c7f36d04634ce1143 commit: 012a224e1fa31fc256aab921f691598e03db6018 s390/uaccess: introduce bit field for OAC specifier date: 5 days ago config: s390-randconfig-r033-20220120 (https://download.01.org/0day-ci/archive/20220122/202201221613.fgIWUw0F-lk...) compiler: s390-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 012a224e1fa31fc256aab921f691598e03db6018 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/s390/lib/uaccess.c: In function 'copy_from_user_mvcos': 65 | union oac spec = { | ^~~ 66 | .oac2.as = PSW_BITS_AS_SECONDARY, | ^~~~ arch/s390/lib/uaccess.c:66:28: warning: excess elements in union initializer 66 | .oac2.as = PSW_BITS_AS_SECONDARY, | ^~~~~~~~~~~~~~~~~~~~~ arch/s390/lib/uaccess.c:66:28: note: (near initialization for 'spec') arch/s390/lib/uaccess.c:67:18: error: 'union oac' has no member named 'oac2' 67 | .oac2.a = 1, | ^~~~ arch/s390/lib/uaccess.c:67:27: warning: excess elements in union initializer 67 | .oac2.a = 1, | ^ arch/s390/lib/uaccess.c:67:27: note: (near initialization for 'spec') 65 | union oac spec = { | ^~~~ arch/s390/lib/uaccess.c:65:19: warning: unused variable 'spec' [-Wunused-variable] arch/s390/lib/uaccess.c: In function 'copy_to_user_mvcos': arch/s390/lib/uaccess.c:142:15: error: variable 'spec' has initializer but incomplete type 142 | union oac spec = { | ^~~ 143 | .oac1.as = PSW_BITS_AS_SECONDARY, | ^~~~ arch/s390/lib/uaccess.c:143:28: warning: excess elements in union initializer 143 | .oac1.as = PSW_BITS_AS_SECONDARY, | ^~~~~~~~~~~~~~~~~~~~~ arch/s390/lib/uaccess.c:143:28: note: (near initialization for 'spec') arch/s390/lib/uaccess.c:144:18: error: 'union oac' has no member named 'oac1' 144 | .oac1.a = 1, | ^~~~ arch/s390/lib/uaccess.c:144:27: warning: excess elements in union initializer 144 | .oac1.a = 1, | ^ arch/s390/lib/uaccess.c:144:27: note: (near initialization for 'spec') arch/s390/lib/uaccess.c:142:19: error: storage size of 'spec' isn't known 142 | union oac spec = { | ^~~~ arch/s390/lib/uaccess.c:142:19: warning: unused variable 'spec' [-Wunused-variable] arch/s390/lib/uaccess.c: In function 'clear_user_mvcos': arch/s390/lib/uaccess.c:218:15: error: variable 'spec' has initializer but incomplete type 218 | union oac spec = { | ^~~ arch/s390/lib/uaccess.c:219:18: error: 'union oac' has no member named 'oac1' 219 | .oac1.as = PSW_BITS_AS_SECONDARY, | ^~~~ arch/s390/lib/uaccess.c:219:28: warning: excess elements in union initializer 219 | .oac1.as = PSW_BITS_AS_SECONDARY, | ^~~~~~~~~~~~~~~~~~~~~ arch/s390/lib/uaccess.c:219:28: note: (near initialization for 'spec') arch/s390/lib/uaccess.c:220:18: error: 'union oac' has no member named 'oac1' 220 | .oac1.a = 1, | ^~~~ arch/s390/lib/uaccess.c:220:27: warning: excess elements in union initializer 220 | .oac1.a = 1, | ^ arch/s390/lib/uaccess.c:220:27: note: (near initialization for 'spec') arch/s390/lib/uaccess.c:218:19: error: storage size of 'spec' isn't known 218 | union oac spec = { | ^~~~ arch/s390/lib/uaccess.c:218:19: warning: unused variable 'spec' [-Wunused-variable] vim +/spec +65 arch/s390/lib/uaccess.c 60 61 static inline unsigned long copy_from_user_mvcos(void *x, const void __user *ptr, 62 unsigned long size) 63 { 64 unsigned long tmp1, tmp2; 68 }; 69 70 tmp1 = -4096UL; 71 asm volatile( 72 " lr 0,%[spec]\n" 73 "0: .insn ss,0xc80000000000,0(%0,%2),0(%1),0\n" 74 "6: jz 4f\n" 75 "1: algr %0,%3\n" 76 " slgr %1,%3\n" 77 " slgr %2,%3\n" 78 " j 0b\n" 79 "2: la %4,4095(%1)\n"/* %4 = ptr + 4095 */ 80 " nr %4,%3\n" /* %4 = (ptr + 4095) & -4096 */ 81 " slgr %4,%1\n" 82 " clgr %0,%4\n" /* copy crosses next page boundary? */ 83 " jnh 5f\n" 84 "3: .insn ss,0xc80000000000,0(%4,%2),0(%1),0\n" 85 "7: slgr %0,%4\n" 86 " j 5f\n" 87 "4: slgr %0,%0\n" 88 "5:\n" 89 EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(6b,2b) EX_TABLE(7b,5b) 90 : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) 91 : [spec] "d" (spec.val) 92 : "cc", "memory", "0"); 93 return size; 94 } 95 96 static inline unsigned long copy_from_user_mvcp(void *x, const void __user *ptr, 97 unsigned long size) 98 { 99 unsigned long tmp1, tmp2; 100 101 tmp1 = -256UL; 102 asm volatile( 103 " sacf 0\n" 104 "0: mvcp 0(%0,%2),0(%1),%3\n" 105 "7: jz 5f\n" 106 "1: algr %0,%3\n" 107 " la %1,256(%1)\n" 108 " la %2,256(%2)\n" 109 "2: mvcp 0(%0,%2),0(%1),%3\n" 110 "8: jnz 1b\n" 111 " j 5f\n" 112 "3: la %4,255(%1)\n" /* %4 = ptr + 255 */ 113 " lghi %3,-4096\n" 114 " nr %4,%3\n" /* %4 = (ptr + 255) & -4096 */ 115 " slgr %4,%1\n" 116 " clgr %0,%4\n" /* copy crosses next page boundary? */ 117 " jnh 6f\n" 118 "4: mvcp 0(%4,%2),0(%1),%3\n" 119 "9: slgr %0,%4\n" 120 " j 6f\n" 121 "5: slgr %0,%0\n" 122 "6: sacf 768\n" 123 EX_TABLE(0b,3b) EX_TABLE(2b,3b) EX_TABLE(4b,6b) 124 EX_TABLE(7b,3b) EX_TABLE(8b,3b) EX_TABLE(9b,6b) 125 : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) 126 : : "cc", "memory"); 127 return size; 128 } 129 130 unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n) 131 { 132 if (copy_with_mvcos()) 133 return copy_from_user_mvcos(to, from, n); 134 return copy_from_user_mvcp(to, from, n); 135 } 136 EXPORT_SYMBOL(raw_copy_from_user); 137 138 static inline unsigned long copy_to_user_mvcos(void __user *ptr, const void *x, 139 unsigned long size) 140 { 141 unsigned long tmp1, tmp2; 142 union oac spec = { 144 .oac1.a = 1, 145 }; 146 147 tmp1 = -4096UL; 148 asm volatile( 149 " lr 0,%[spec]\n" 150 "0: .insn ss,0xc80000000000,0(%0,%1),0(%2),0\n" 151 "6: jz 4f\n" 152 "1: algr %0,%3\n" 153 " slgr %1,%3\n" 154 " slgr %2,%3\n" 155 " j 0b\n" 156 "2: la %4,4095(%1)\n"/* %4 = ptr + 4095 */ 157 " nr %4,%3\n" /* %4 = (ptr + 4095) & -4096 */ 158 " slgr %4,%1\n" 159 " clgr %0,%4\n" /* copy crosses next page boundary? */ 160 " jnh 5f\n" 161 "3: .insn ss,0xc80000000000,0(%4,%1),0(%2),0\n" 162 "7: slgr %0,%4\n" 163 " j 5f\n" 164 "4: slgr %0,%0\n" 165 "5:\n" 166 EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(6b,2b) EX_TABLE(7b,5b) 167 : "+a" (size), "+a" (ptr), "+a" (x), "+a" (tmp1), "=a" (tmp2) 168 : [spec] "d" (spec.val) 169 : "cc", "memory", "0"); 170 return size; 171 } 172 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org