Re: [rt-devel:linux-6.10.y-rt-rebase 63/93] kernel/printk/printk.o: warning: objtool: __jump_table+0x0: special: can't find orig instruction

[John Ogness <john.ogness@linutronix.de>]

On 2024-05-30, kernel test robot <lkp@intel.com> wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-6.10.y-rt-rebase
> head:   6d20efa57a896036453f4b061ae22601ef61b494
> commit: 127f3e5b794bd6fa90d4649318dd898455efa6d7 [63/93] printk: Provide threadprintk boot argument
> config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20240530/202405300545.mVqyyvyr-lkp@intel.com/config)
> compiler: loongarch64-linux-gcc (GCC) 13.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240530/202405300545.mVqyyvyr-lkp@intel.com/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@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202405300545.mVqyyvyr-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
>
>>> kernel/printk/printk.o: warning: objtool: __jump_table+0x0: special: can't find orig instruction
> --
>>> kernel/printk/nbcon.o: warning: objtool: __jump_table+0x0: special: can't find orig instruction

On loongarch, it looks like all users of the jump_table are causing this
warning. I will assume this is something that needs to be fixed at the
arch level (either in the kernel or the compiler).

John Ogness