Re: [linux-next:master 2837/10638] powerpc64-linux-ld: warning: orphan section `.stubs' from `drivers/platform/chrome/cros_ec_trace.o' being placed in section `.stubs'

Re: [linux-next:master 2837/10638] powerpc64-linux-ld: warning: orphan section `.stubs' from `drivers/platform/chrome/cros_ec_trace.o' being placed in section `.stubs'

[Nicholas Piggin]

Excerpts from kernel test robot's message of August 27, 2021 7:29 pm:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   88fac11862d38306dd0d2398015744877140390d
> commit: d453ceb6549af8798913de6a20444cb7200fdb69 [2837/10638] platform/chrome: sensorhub: Add trace events for sample
> config: powerpc64-randconfig-r021-20210827 (attached as .config)
> compiler: powerpc64-linux-gcc (GCC) 11.2.0
> 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
>         # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=d453ceb6549af8798913de6a20444cb7200fdb69
>         git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>         git fetch --no-tags linux-next master
>         git checkout d453ceb6549af8798913de6a20444cb7200fdb69
>         # save the attached .config to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All warnings (new ones prefixed by >>):
> 
>>> powerpc64-linux-ld: warning: orphan section `.stubs' from `drivers/platform/chrome/cros_ec_trace.o' being placed in section `.stubs'
>>> powerpc64-linux-ld: warning: orphan section `.stubs' from `drivers/platform/chrome/cros_ec_trace.o' being placed in section `.stubs'
>>> powerpc64-linux-ld: warning: orphan section `.stubs' from `drivers/platform/chrome/cros_ec_trace.o' being placed in section `.stubs'

What creates .stubs? We have something in modules code which does but 
not vmlinux code. I can't see anything in modern binutils linker that
creates .stubs. And why is this particular file setting it off? Strange.

Thanks,
Nick