Hi Julien, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-5.4.y head: 6ccc74c083c0d472ac64f3733f5b7bf3f99f261e commit: 735e7a12a639c6c196ac1acf41f024f84281e491 [1325/4536] lib/ubsan: don't serialize UBSAN report config: riscv-randconfig-a001-20200421 (attached as .config) compiler: riscv64-linux-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 git checkout 735e7a12a639c6c196ac1acf41f024f84281e491 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): riscv64-linux-ld: lib/ubsan.o: in function `test_and_set_bit': >> arch/riscv/include/asm/bitops.h:74: undefined reference to `__ashlti3' riscv64-linux-ld: lib/ubsan.o: in function `get_signed_val': >> lib/ubsan.c:422: undefined reference to `__ashrti3' vim +422 lib/ubsan.c c6d308534aef6c Andrey Ryabinin 2016-01-20 405 c6d308534aef6c Andrey Ryabinin 2016-01-20 406 void __ubsan_handle_load_invalid_value(struct invalid_value_data *data, f0996bc2978e02 Andrey Ryabinin 2019-05-06 407 void *val) c6d308534aef6c Andrey Ryabinin 2016-01-20 408 { c6d308534aef6c Andrey Ryabinin 2016-01-20 409 char val_str[VALUE_LENGTH]; c6d308534aef6c Andrey Ryabinin 2016-01-20 410 c6d308534aef6c Andrey Ryabinin 2016-01-20 411 if (suppress_report(&data->location)) c6d308534aef6c Andrey Ryabinin 2016-01-20 412 return; c6d308534aef6c Andrey Ryabinin 2016-01-20 413 735e7a12a639c6 Julien Grall 2019-12-04 414 ubsan_prologue(&data->location); c6d308534aef6c Andrey Ryabinin 2016-01-20 415 c6d308534aef6c Andrey Ryabinin 2016-01-20 416 val_to_string(val_str, sizeof(val_str), data->type, val); c6d308534aef6c Andrey Ryabinin 2016-01-20 417 c6d308534aef6c Andrey Ryabinin 2016-01-20 418 pr_err("load of value %s is not a valid value for type %s\n", c6d308534aef6c Andrey Ryabinin 2016-01-20 419 val_str, data->type->type_name); c6d308534aef6c Andrey Ryabinin 2016-01-20 420 735e7a12a639c6 Julien Grall 2019-12-04 421 ubsan_epilogue(); c6d308534aef6c Andrey Ryabinin 2016-01-20 @422 } :::::: The code at line 422 was first introduced by commit :::::: c6d308534aef6c99904bf5862066360ae067abc4 UBSAN: run-time undefined behavior sanity checker :::::: TO: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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