arch/powerpc/kvm/../kernel/head_booke.h:20:6: warning: "THREAD_SHIFT" is not defined, evaluates to 0

[Nick Desaulniers]

On Tue, Apr 4, 2023 at 6:29 PM kernel test robot <lkp at intel.com> wrote:
>
> Hi Masahiro,
>
> FYI, the error/warning still remains.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   76f598ba7d8e2bfb4855b5298caedd5af0c374a8
> commit: 80b6093b55e31c2c40ff082fb32523d4e852954f kbuild: add -Wundef to KBUILD_CPPFLAGS for W=1 builds
> date:   4 months ago
> config: powerpc-buildonly-randconfig-r003-20230405 (https://download.01.org/0day-ci/archive/20230405/202304050954.yskLdczH-lkp@intel.com/config)
> compiler: powerpc-linux-gcc (GCC) 12.1.0
> 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=80b6093b55e31c2c40ff082fb32523d4e852954f
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 80b6093b55e31c2c40ff082fb32523d4e852954f
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/kernel/ arch/powerpc/kvm/ virt/
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp at intel.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202304050954.yskLdczH-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
>
>    In file included from arch/powerpc/kvm/bookehv_interrupts.S:26:
> >> arch/powerpc/kvm/../kernel/head_booke.h:20:6: warning: "THREAD_SHIFT" is not defined, evaluates to 0 [-Wundef]
>       20 | #if (THREAD_SHIFT < 15)
>          |      ^~~~~~~~~~~~

Should arch/powerpc/kernel/head_booke.h be #include'ing
asm/thread_info.h before using THREAD_SHIFT?

>
>
> vim +/THREAD_SHIFT +20 arch/powerpc/kvm/../kernel/head_booke.h
>
> 1a4b739bbb4f88 Christophe Leroy 2019-04-30  10
> 63dafe5728e735 Becky Bruce      2006-01-14  11  /*
> 63dafe5728e735 Becky Bruce      2006-01-14  12   * Macros used for common Book-e exception handling
> 63dafe5728e735 Becky Bruce      2006-01-14  13   */
> 63dafe5728e735 Becky Bruce      2006-01-14  14
> 63dafe5728e735 Becky Bruce      2006-01-14  15  #define SET_IVOR(vector_number, vector_label)           \
> 63dafe5728e735 Becky Bruce      2006-01-14  16                  li      r26,vector_label at l;             \
> 63dafe5728e735 Becky Bruce      2006-01-14  17                  mtspr   SPRN_IVOR##vector_number,r26;   \
> 63dafe5728e735 Becky Bruce      2006-01-14  18                  sync
> 63dafe5728e735 Becky Bruce      2006-01-14  19
> e12401222f749c Yuri Tikhonov    2009-01-29 @20  #if (THREAD_SHIFT < 15)
> e12401222f749c Yuri Tikhonov    2009-01-29  21  #define ALLOC_STACK_FRAME(reg, val)                     \
> e12401222f749c Yuri Tikhonov    2009-01-29  22          addi reg,reg,val
> e12401222f749c Yuri Tikhonov    2009-01-29  23  #else
> e12401222f749c Yuri Tikhonov    2009-01-29  24  #define ALLOC_STACK_FRAME(reg, val)                     \
> e12401222f749c Yuri Tikhonov    2009-01-29  25          addis   reg,reg,val at ha;                         \
> e12401222f749c Yuri Tikhonov    2009-01-29  26          addi    reg,reg,val at l
> e12401222f749c Yuri Tikhonov    2009-01-29  27  #endif
> e12401222f749c Yuri Tikhonov    2009-01-29  28
>
> :::::: The code at line 20 was first introduced by commit
> :::::: e12401222f749c37277a313d631dc024bbfd3b00 powerpc/44x: Support for 256KB PAGE_SIZE
>
> :::::: TO: Yuri Tikhonov <yur at emcraft.com>
> :::::: CC: Josh Boyer <jwboyer at linux.vnet.ibm.com>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests



-- 
Thanks,
~Nick Desaulniers