[PATCH v9 2/2] powerpc/64s: KVM update for reimplement book3s idle code in C

[Nicholas Piggin]

kbuild test robot's on April 13, 2019 12:51 pm:
> Hi Nicholas,
> 
> I love your patch! Yet something to improve:
> 
> [auto build test ERROR on powerpc/next]
> [also build test ERROR on v5.1-rc4 next-20190412]
> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> 
> url:    https://github.com/0day-ci/linux/commits/Nicholas-Piggin/powerpc-64s-reimplement-book3s-idle-code-in-C/20190413-002437
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
> config: powerpc-defconfig (attached as .config)
> compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # save the attached .config to linux build tree
>         GCC_VERSION=7.2.0 make.cross ARCH=powerpc 
> 
> All errors (new ones prefixed by >>):
> 
>    powerpc64-linux-gnu-ld: warning: orphan section `.gnu.hash' from `linker stubs' being placed in section `.gnu.hash'.
>    arch/powerpc/platforms/powernv/idle.o: In function `.pnv_cpu_offline':
>>> (.text+0x1900): undefined reference to `.idle_kvm_start_guest'

Argh, it took me longer than I'd like to admit to work this out. I'm
ELFv1-illiterate. Replacing .globl with _GLOBAL seems to fix it. I'll
roll that into the next patch.

Thanks,
Nick