linux-kernel - include/linux/compiler_types.h:510:45: error: call to '__compiletime_assert_495' declared with attribute error: BUILD_BUG_ON failed: ALIGN_DOWN(MODULES_VADDR, SZ_256M) < TASK

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Message-ID: <202409201842.sdYULOZc-lkp@intel.com>
Date: Fri, 20 Sep 2024 18:08:11 +0800
From: kernel test robot <lkp@...el.com>
To: Christophe Leroy <christophe.leroy@...roup.eu>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Michael Ellerman <mpe@...erman.id.au>
Subject: include/linux/compiler_types.h:510:45: error: call to
 '__compiletime_assert_495' declared with attribute error: BUILD_BUG_ON
 failed: ALIGN_DOWN(MODULES_VADDR, SZ_256M) < TASK_SIZE

Hi Christophe,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   baeb9a7d8b60b021d907127509c44507539c15e5
commit: 2f2b9a3adc66e978a1248ffb38df8477e8e97c57 powerpc/32s: Reduce default size of module/execmem area
date:   3 weeks ago
config: powerpc-randconfig-r013-20220912 (https://download.01.org/0day-ci/archive/20240920/202409201842.sdYULOZc-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240920/202409201842.sdYULOZc-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409201842.sdYULOZc-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   arch/powerpc/mm/book3s32/mmu.c: In function 'mmu_mark_initmem_nx':
>> include/linux/compiler_types.h:510:45: error: call to '__compiletime_assert_495' declared with attribute error: BUILD_BUG_ON failed: ALIGN_DOWN(MODULES_VADDR, SZ_256M) < TASK_SIZE
     510 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:491:25: note: in definition of macro '__compiletime_assert'
     491 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:510:9: note: in expansion of macro '_compiletime_assert'
     510 |         _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/powerpc/mm/book3s32/mmu.c:226:9: note: in expansion of macro 'BUILD_BUG_ON'
     226 |         BUILD_BUG_ON(ALIGN_DOWN(MODULES_VADDR, SZ_256M) < TASK_SIZE);
         |         ^~~~~~~~~~~~


vim +/__compiletime_assert_495 +510 include/linux/compiler_types.h

eb5c2d4b45e3d2 Will Deacon 2020-07-21  496  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  497  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21  498  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  499  
eb5c2d4b45e3d2 Will Deacon 2020-07-21  500  /**
eb5c2d4b45e3d2 Will Deacon 2020-07-21  501   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  502   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2 Will Deacon 2020-07-21  503   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2 Will Deacon 2020-07-21  504   *
eb5c2d4b45e3d2 Will Deacon 2020-07-21  505   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  506   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2 Will Deacon 2020-07-21  507   * compiler has support to do so.
eb5c2d4b45e3d2 Will Deacon 2020-07-21  508   */
eb5c2d4b45e3d2 Will Deacon 2020-07-21  509  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2 Will Deacon 2020-07-21 @510  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2 Will Deacon 2020-07-21  511  

:::::: The code at line 510 was first introduced by commit
:::::: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h

:::::: TO: Will Deacon <will@...nel.org>
:::::: CC: Will Deacon <will@...nel.org>

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