Re: undefined reference to `.radix__create_section_mapping'

[Christophe Leroy]

Hi Randy,

Le 04/08/2021 à 04:40, Randy Dunlap a écrit :
> On 7/31/21 11:22 AM, kernel test robot wrote:
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> > head:   c7d102232649226a69dddd58a4942cf13cff4f7c
> > commit: fe3dc333d2ed50c9764d281869d87bae0d795ce5 powerpc/mmu: Don't duplicate radix_enabled()
> > date:   3 months ago
> > config: powerpc64-randconfig-r013-20210731 (attached as .config)
> > compiler: powerpc-linux-gcc (GCC) 10.3.0
> > 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/torvalds/linux.git/commit/?id=fe3dc333d2ed50c9764d281869d87bae0d795ce5 
> >
> >          git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> >          git fetch --no-tags linus master
> >          git checkout fe3dc333d2ed50c9764d281869d87bae0d795ce5
> >          # save the attached .config to linux build tree
> >          mkdir build_dir
> >          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 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@xxxxxxxxx>
> >
> > All errors (new ones prefixed by >>):
> >
> >     powerpc-linux-ld: arch/powerpc/mm/book3s64/pgtable.o: in function `.create_section_mapping':
> > > > (.meminit.text+0x3c): undefined reference to `.radix__create_section_mapping'
> >     powerpc-linux-ld: arch/powerpc/mm/book3s64/pgtable.o: in function `.remove_section_mapping':
> > > > (.meminit.text+0x90): undefined reference to `.radix__remove_section_mapping'
>
> In the randconfig file:
> # CONFIG_PPC_RADIX_MMU is not set
>
> It is default y, but maybe that is not strong enough?
> I.e., should it be selected by PPC_BOOK3S_64?
>
> Changing the config to PPC_RADIX_MMU=y fixes the build errors.
>
> Or should arch/powerpc/mm/book3s64/pgtable.c be modified to handle
> the case of PPC_RADIX_MMU is not set?

Can you test 
https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20210804013724.514468-1-jniethe5@xxxxxxxxx/ ?

Thanks
Christophe