linux-kernel - include/linux/compiler_types.h:338:45: error: call to '__compiletime_assert_247' declared with attribute error: BUILD_BUG_ON failed: SECTIONS_WIDTH + NODES_WIDTH + ZONES_WIDTH + ilog2(roundup_pow_of_two(NR

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Date:   Thu, 31 Mar 2022 00:54:24 +0800
From:   kernel test robot <lkp@...el.com>
To:     Will Deacon <will@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: include/linux/compiler_types.h:338:45: error: call to
 '__compiletime_assert_247' declared with attribute error: BUILD_BUG_ON
 failed: SECTIONS_WIDTH + NODES_WIDTH + ZONES_WIDTH +
 ilog2(roundup_pow_of_two(NR_CPUS)) > 32

Hi Will,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d888c83fcec75194a8a48ccd283953bdba7b2550
commit: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h
date:   1 year, 8 months ago
config: sparc-randconfig-r023-20220330 (https://download.01.org/0day-ci/archive/20220331/202203310048.Lh5iXsQu-lkp@intel.com/config)
compiler: sparc64-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/torvalds/linux.git/commit/?id=eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=sparc SHELL=/bin/bash arch/sparc/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   arch/sparc/mm/init_64.c: In function 'arch_hugetlb_valid_size':
   arch/sparc/mm/init_64.c:354:24: error: variable 'hv_pgsz_idx' set but not used [-Werror=unused-but-set-variable]
     354 |         unsigned short hv_pgsz_idx;
         |                        ^~~~~~~~~~~
   arch/sparc/mm/init_64.c: In function 'sun4v_linear_pte_xor_finalize':
   arch/sparc/mm/init_64.c:2210:23: error: variable 'pagecv_flag' set but not used [-Werror=unused-but-set-variable]
    2210 |         unsigned long pagecv_flag;
         |                       ^~~~~~~~~~~
   In file included from <command-line>:
   arch/sparc/mm/init_64.c: In function 'paging_init':
>> include/linux/compiler_types.h:338:45: error: call to '__compiletime_assert_247' declared with attribute error: BUILD_BUG_ON failed: SECTIONS_WIDTH + NODES_WIDTH + ZONES_WIDTH + ilog2(roundup_pow_of_two(NR_CPUS)) > 32
     338 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:319:25: note: in definition of macro '__compiletime_assert'
     319 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:338:9: note: in expansion of macro '_compiletime_assert'
     338 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
      39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
         |                                     ^~~~~~~~~~~~~~~~~~
   include/linux/build_bug.h:50:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      50 |         BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
         |         ^~~~~~~~~~~~~~~~
   arch/sparc/mm/init_64.c:2306:9: note: in expansion of macro 'BUILD_BUG_ON'
    2306 |         BUILD_BUG_ON(SECTIONS_WIDTH + NODES_WIDTH + ZONES_WIDTH +
         |         ^~~~~~~~~~~~
   cc1: all warnings being treated as errors

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for COMPAT_BINFMT_ELF
   Depends on COMPAT && BINFMT_ELF
   Selected by
   - COMPAT && SPARC64


vim +/__compiletime_assert_247 +338 include/linux/compiler_types.h

   324	
   325	#define _compiletime_assert(condition, msg, prefix, suffix) \
   326		__compiletime_assert(condition, msg, prefix, suffix)
   327	
   328	/**
   329	 * compiletime_assert - break build and emit msg if condition is false
   330	 * @condition: a compile-time constant condition to check
   331	 * @msg:       a message to emit if condition is false
   332	 *
   333	 * In tradition of POSIX assert, this macro will break the build if the
   334	 * supplied condition is *false*, emitting the supplied error message if the
   335	 * compiler has support to do so.
   336	 */
   337	#define compiletime_assert(condition, msg) \
 > 338		_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
   339	

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