+Cc: initial authors of Loongarch64 jump table implementation and people who touched that code. On Fri, Jun 07, 2024 at 09:48:51PM +0800, kernel test robot wrote: > Hi Andy, > > kernel test robot noticed the following build warnings: > > [auto build test WARNING on tty/tty-testing] > [also build test WARNING on tty/tty-next next-20240607] > [cannot apply to tty/tty-linus linus/master v6.10-rc2] > [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/Andy-Shevchenko/serial-8250_platform-Explicitly-show-we-initialise-ISA-ports-only-once/20240607-025109 > base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing > patch link: https://lore.kernel.org/r/20240606184841.3102545-1-andriy.shevchenko%40linux.intel.com > patch subject: [PATCH v1 1/1] serial: 8250_platform: Explicitly show we initialise ISA ports only once > config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20240607/202406072102.SGp8FYYi-lkp@xxxxxxxxx/config) > compiler: loongarch64-linux-gcc (GCC) 13.2.0 > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240607/202406072102.SGp8FYYi-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/202406072102.SGp8FYYi-lkp@xxxxxxxxx/ > > All warnings (new ones prefixed by >>): > > >> drivers/tty/serial/8250/8250_platform.o: warning: objtool: __jump_table+0x0: special: can't find orig instruction > > objdump-func vmlinux.o __jump_table: Folks, can you look into it? It sounds like jump table is misimplemented for this architecture (but I'm quite unsure). Similar issue LKP reported here: https://lore.kernel.org/all/202405290629.oaN9XxEz-lkp@xxxxxxxxx/ P.S. Is it objtool issue or kernel issue? (Just thinking/questioning loudly) -- With Best Regards, Andy Shevchenko
