Re: [PATCH] kbuild: use objcopy to generate asm-offsets

[kernel test robot <lkp@intel.com>]

Hi Vegard,

kernel test robot noticed the following build warnings:

[auto build test WARNING on masahiroy-kbuild/for-next]
[also build test WARNING on masahiroy-kbuild/fixes soc/for-next kvmarm/next kvm/queue uml/next krzk-mem-ctrl/for-next bpf-next/master bpf/master linus/master v6.11-rc5 next-20240829]
[cannot apply to tmlind-omap/for-next kvm/linux-next uml/fixes]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Vegard-Nossum/kbuild-use-objcopy-to-generate-asm-offsets/20240828-163854
base:   https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git for-next
patch link:    https://lore.kernel.org/r/20240828083605.3093701-1-vegard.nossum%40oracle.com
patch subject: [PATCH] kbuild: use objcopy to generate asm-offsets
config: mips-loongson3_defconfig (https://download.01.org/0day-ci/archive/20240830/202408300438.xObK98m5-lkp@intel.com/config)
compiler: mips64el-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240830/202408300438.xObK98m5-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/202408300438.xObK98m5-lkp@intel.com/

All warnings (new ones prefixed by >>):

   mips64el-linux-objcopy: /dev/stdout[.data.kbuild]: Illegal seek
   In file included from include/linux/mm_types.h:18,
                    from include/linux/uio.h:10,
                    from include/linux/socket.h:8,
                    from include/linux/compat.h:15,
                    from arch/mips/kernel/asm-offsets.c:12:
   include/linux/page-flags-layout.h:15:5: warning: "MAX_NR_ZONES" is not defined, evaluates to 0 [-Wundef]
      15 | #if MAX_NR_ZONES < 2
         |     ^~~~~~~~~~~~
   include/linux/page-flags-layout.h:58:19: warning: "LRU_GEN_WIDTH" is not defined, evaluates to 0 [-Wundef]
      58 | #if ZONES_WIDTH + LRU_GEN_WIDTH + SECTIONS_WIDTH + NODES_SHIFT \
         |                   ^~~~~~~~~~~~~
   include/linux/page-flags-layout.h:59:28: warning: "NR_PAGEFLAGS" is not defined, evaluates to 0 [-Wundef]
      59 |         <= BITS_PER_LONG - NR_PAGEFLAGS
         |                            ^~~~~~~~~~~~
   include/linux/page-flags-layout.h:93:19: warning: "LRU_GEN_WIDTH" is not defined, evaluates to 0 [-Wundef]
      93 | #if ZONES_WIDTH + LRU_GEN_WIDTH + SECTIONS_WIDTH + NODES_WIDTH + \
         |                   ^~~~~~~~~~~~~
   include/linux/page-flags-layout.h:94:64: warning: "NR_PAGEFLAGS" is not defined, evaluates to 0 [-Wundef]
      94 |         KASAN_TAG_WIDTH + LAST_CPUPID_SHIFT <= BITS_PER_LONG - NR_PAGEFLAGS
         |                                                                ^~~~~~~~~~~~
   include/linux/page-flags-layout.h:104:19: warning: "LRU_GEN_WIDTH" is not defined, evaluates to 0 [-Wundef]
     104 | #if ZONES_WIDTH + LRU_GEN_WIDTH + SECTIONS_WIDTH + NODES_WIDTH + \
         |                   ^~~~~~~~~~~~~
   include/linux/page-flags-layout.h:105:63: warning: "NR_PAGEFLAGS" is not defined, evaluates to 0 [-Wundef]
     105 |         KASAN_TAG_WIDTH + LAST_CPUPID_WIDTH > BITS_PER_LONG - NR_PAGEFLAGS
         |                                                               ^~~~~~~~~~~~
   In file included from include/linux/mm_types.h:5:
   include/linux/mm_types_task.h:22:34: warning: "SPINLOCK_SIZE" is not defined, evaluates to 0 [-Wundef]
      22 | #define ALLOC_SPLIT_PTLOCKS     (SPINLOCK_SIZE > BITS_PER_LONG/8)
         |                                  ^~~~~~~~~~~~~
   include/linux/mm_types.h:478:5: note: in expansion of macro 'ALLOC_SPLIT_PTLOCKS'
     478 | #if ALLOC_SPLIT_PTLOCKS
         |     ^~~~~~~~~~~~~~~~~~~
   In file included from include/linux/dcache.h:14,
                    from include/linux/fs.h:8,
                    from include/linux/compat.h:17:
>> include/linux/lockref.h:23:36: warning: "SPINLOCK_SIZE" is not defined, evaluates to 0 [-Wundef]
      23 |          IS_ENABLED(CONFIG_SMP) && SPINLOCK_SIZE <= 4)
         |                                    ^~~~~~~~~~~~~
   include/linux/lockref.h:27:5: note: in expansion of macro 'USE_CMPXCHG_LOCKREF'
      27 | #if USE_CMPXCHG_LOCKREF
         |     ^~~~~~~~~~~~~~~~~~~
   In file included from include/linux/gfp.h:7,
                    from include/linux/xarray.h:16,
                    from include/linux/list_lru.h:14,
                    from include/linux/fs.h:13:
   include/linux/mmzone.h:842:29: error: 'MAX_NR_ZONES' undeclared here (not in a function); did you mean 'MAX_NR_GENS'?
     842 |         long lowmem_reserve[MAX_NR_ZONES];
         |                             ^~~~~~~~~~~~
         |                             MAX_NR_GENS
   include/linux/mm_types_task.h:22:34: warning: "SPINLOCK_SIZE" is not defined, evaluates to 0 [-Wundef]
      22 | #define ALLOC_SPLIT_PTLOCKS     (SPINLOCK_SIZE > BITS_PER_LONG/8)
         |                                  ^~~~~~~~~~~~~
   include/linux/mm.h:2889:5: note: in expansion of macro 'ALLOC_SPLIT_PTLOCKS'
    2889 | #if ALLOC_SPLIT_PTLOCKS
         |     ^~~~~~~~~~~~~~~~~~~
   In file included from include/linux/swap.h:9,
                    from include/linux/suspend.h:5,
                    from arch/mips/kernel/asm-offsets.c:17:
   include/linux/memcontrol.h: In function 'mem_cgroup_get_zone_lru_size':
>> include/linux/memcontrol.h:914:31: warning: parameter 'lru' set but not used [-Wunused-but-set-parameter]
     914 |                 enum lru_list lru, int zone_idx)
         |                 ~~~~~~~~~~~~~~^~~
>> include/linux/memcontrol.h:914:40: warning: parameter 'zone_idx' set but not used [-Wunused-but-set-parameter]
     914 |                 enum lru_list lru, int zone_idx)
         |                                    ~~~~^~~~~~~~
   make[3]: *** [scripts/Makefile.build:244: arch/mips/kernel/asm-offsets.o] Error 1
   make[3]: Target 'missing-syscalls' not remade because of errors.
   make[2]: *** [arch/mips/Makefile:432: archprepare] Error 2
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:224: __sub-make] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:224: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.


vim +/SPINLOCK_SIZE +23 include/linux/lockref.h

57f4257eae33e0 Peter Zijlstra     2013-11-14  20  
57f4257eae33e0 Peter Zijlstra     2013-11-14  21  #define USE_CMPXCHG_LOCKREF \
57f4257eae33e0 Peter Zijlstra     2013-11-14  22  	(IS_ENABLED(CONFIG_ARCH_USE_CMPXCHG_LOCKREF) && \
597d795a2a786d Kirill A. Shutemov 2013-12-20 @23  	 IS_ENABLED(CONFIG_SMP) && SPINLOCK_SIZE <= 4)
0f8f2aaaab0b0f Waiman Long        2013-08-28  24  

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