I can reproduce the build error. The reason for the error is because in CONFIG_SPARC64, the symbol swapper_tsb needs to have a fixed address of 0x0000000000408000. In arch/sparc/kernel/vmlinux.lds.S 37 #ifdef CONFIG_SPARC64 38 ASSERT((swapper_tsb == 0x0000000000408000), "Error: sparc64 early assembler too large") 39 #endif This symbol resides in the .text section. The patch relocates "cold" functions (tagged by .text.unlikely) to precede other symbols within the .text section. This pushes swapper_tsb to a higher memory address, and we have the assertion. However, this sparc code appears incompatible with the original linker script. The original script prioritized .text.hot symbols, placing them before others in the .text section. Currently, no functions are marked as "hot" in the source code. If a function were marked with __attribute__((hot)), the build would also fail. I don't know a good solution other than adding a branch to the include/asm-generic/vmlinux.lds.h. @Masahiro Yamada: I'd appreciate any further suggestions you might have. Best regards, -Rong On Thu, Oct 24, 2024 at 11:47 PM kernel test robot <lkp@xxxxxxxxx> wrote: > > Hi Rong, > > kernel test robot noticed the following build errors: > > [auto build test ERROR on eb952c47d154ba2aac794b99c66c3c45eb4cc4ec] > > url: https://github.com/intel-lab-lkp/linux/commits/Rong-Xu/Add-AutoFDO-support-for-Clang-build/20241024-064725 > base: eb952c47d154ba2aac794b99c66c3c45eb4cc4ec > patch link: https://lore.kernel.org/r/20241023224409.201771-4-xur%40google.com > patch subject: [PATCH v5 3/7] Change the symbols order when --ffunction-sections is enabled > config: sparc-sparc64_defconfig (https://download.01.org/0day-ci/archive/20241025/202410251411.eRNArTOZ-lkp@xxxxxxxxx/config) > compiler: sparc64-linux-gcc (GCC) 13.3.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241025/202410251411.eRNArTOZ-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/202410251411.eRNArTOZ-lkp@xxxxxxxxx/ > > All errors (new ones prefixed by >>): > > >> sparc64-linux-ld: Error: sparc64 early assembler too large > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki
