[kbuild-all] [masahiroy:for-next 9/9] <inline asm>:6:2: error: cpu alternatives does not support instructions blocks > 254 bytes

tree: https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git for-next head: f12b034afeb3a977bbb1c6584dedc0f3dc666f14 commit: f12b034afeb3a977bbb1c6584dedc0f3dc666f14 [9/9] scripts/Makefile.clang: default to LLVM_IAS=1 config: s390-randconfig-r024-20210809 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 614c7d03877fd99c2de47429b15be3f00306a3bd) 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 # install s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.gi... git remote add masahiroy https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git git fetch --no-tags masahiroy for-next git checkout f12b034afeb3a977bbb1c6584dedc0f3dc666f14 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=s390 SHELL=/bin/bash fs/ufs/ 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 >>): In file included from fs/ufs/inode.c:38: In file included from include/linux/writeback.h:14: In file included from include/linux/blk-cgroup.h:23: In file included from include/linux/blkdev.h:25: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:36:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from fs/ufs/inode.c:38: In file included from include/linux/writeback.h:14: In file included from include/linux/blk-cgroup.h:23: In file included from include/linux/blkdev.h:25: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from fs/ufs/inode.c:38: In file included from include/linux/writeback.h:14: In file included from include/linux/blk-cgroup.h:23: In file included from include/linux/blkdev.h:25: In file included from include/linux/scatterlist.h:9: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ <inline asm>:5:5: error: expected absolute expression .if 6651b-6641b > 254 ^ .error "cpu alternatives does not support instructions blocks > 254 bytes" ^ <inline asm>:8:5: error: expected absolute expression .if (6651b-6641b) % 2 ^ .error "cpu alternatives instructions length is odd" ^ <inline asm>:15:5: error: expected absolute expression .if -(((6651b-6641b)-(662b-661b)) > 0) * ((6651b-6641b)-(662b-661b)) > 6 ^ <inline asm>:25:5: error: expected absolute expression .if 662b-661b > 254 ^ <inline asm>:26:2: error: cpu alternatives does not support instructions blocks > 254 bytes .error "cpu alternatives does not support instructions blocks > 254 bytes" ^ <inline asm>:28:5: error: expected absolute expression .if (662b-661b) % 2 ^ <inline asm>:29:2: error: cpu alternatives instructions length is odd .error "cpu alternatives instructions length is odd" ^ In file included from fs/ufs/inode.c:29: In file included from include/linux/uaccess.h:8: In file included from include/linux/sched.h:14: In file included from include/linux/pid.h:6: In file included from include/linux/wait.h:9: In file included from include/linux/spinlock.h:90: arch/s390/include/asm/spinlock.h:89:3: error: expected absolute expression ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */ ^ arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE' ALTINSTR_REPLACEMENT(altinstr, 1) \ ^ arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT' INSTR_LEN_SANITY_CHECK(altinstr_len(num)) ^ arch/s390/include/asm/alternative.h:62:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK' ".if " len " > 254\n" \ ^ <inline asm>:5:5: note: instantiated into assembly here .if 6651b-6641b > 254 ^ In file included from fs/ufs/inode.c:29: In file included from include/linux/uaccess.h:8: In file included from include/linux/sched.h:14: In file included from include/linux/pid.h:6: In file included from include/linux/wait.h:9: In file included from include/linux/spinlock.h:90: arch/s390/include/asm/spinlock.h:89:3: error: cpu alternatives does not support instructions blocks > 254 bytes ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */ ^ arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE' ALTINSTR_REPLACEMENT(altinstr, 1) \ ^ arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT' INSTR_LEN_SANITY_CHECK(altinstr_len(num)) ^ arch/s390/include/asm/alternative.h:63:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK' "\t.error \"cpu alternatives does not support instructions " \ ^ <inline asm>:6:2: note: instantiated into assembly here .error "cpu alternatives does not support instructions blocks > 254 bytes" ^ In file included from fs/ufs/inode.c:29: In file included from include/linux/uaccess.h:8: In file included from include/linux/sched.h:14: In file included from include/linux/pid.h:6: In file included from include/linux/wait.h:9: In file included from include/linux/spinlock.h:90: arch/s390/include/asm/spinlock.h:89:3: error: expected absolute expression ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */ ^ arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE' ALTINSTR_REPLACEMENT(altinstr, 1) \ ^ arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT' INSTR_LEN_SANITY_CHECK(altinstr_len(num)) ^ arch/s390/include/asm/alternative.h:66:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK' ".if (" len ") %% 2\n" \ ^ <inline asm>:8:5: note: instantiated into assembly here .if (6651b-6641b) % 2 ^ In file included from fs/ufs/inode.c:29: In file included from include/linux/uaccess.h:8: In file included from include/linux/sched.h:14: In file included from include/linux/pid.h:6: In file included from include/linux/wait.h:9: In file included from include/linux/spinlock.h:90: arch/s390/include/asm/spinlock.h:89:3: error: cpu alternatives instructions length is odd ALTERNATIVE("", ".long 0xb2fa0070", 49) /* NIAI 7 */ ^ arch/s390/include/asm/alternative.h:111:2: note: expanded from macro 'ALTERNATIVE' ALTINSTR_REPLACEMENT(altinstr, 1) \ ^ arch/s390/include/asm/alternative.h:106:2: note: expanded from macro 'ALTINSTR_REPLACEMENT' INSTR_LEN_SANITY_CHECK(altinstr_len(num)) ^ arch/s390/include/asm/alternative.h:67:3: note: expanded from macro 'INSTR_LEN_SANITY_CHECK' "\t.error \"cpu alternatives instructions length is odd\"\n" \ ^ <inline asm>:9:2: note: instantiated into assembly here .error "cpu alternatives instructions length is odd" --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org