include/linux/compiler_types.h:328:45: error: call to '__compiletime_assert_315' declared with attribute error: BUILD_BUG_ON failed: (PTRS_PER_PTE * sizeof(pte_t)) > PAGE_SIZE

[Vineet Gupta]

On 9/15/24 11:07, kernel test robot wrote:
> Hi Vineet,
>
> FYI, the error/warning still remains.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   98f7e32f20d28ec452afb208f9cffc08448a2652
> commit: d9820ff76f95fa26d33e412254a89cd65b23142d ARC: mm: switch pgtable_t back to struct page *
> date:   3 years, 1 month ago
> config: arc-randconfig-r064-20240915 (https://download.01.org/0day-ci/archive/20240916/202409160223.xydgucbY-lkp@intel.com/config)
> compiler: arc-elf-gcc (GCC) 13.2.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240916/202409160223.xydgucbY-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 at intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202409160223.xydgucbY-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
>    arch/arc/mm/init.c:35:13: warning: no previous prototype for 'arc_get_mem_sz' [-Wmissing-prototypes]
>       35 | long __init arc_get_mem_sz(void)
>          |             ^~~~~~~~~~~~~~
>    arch/arc/mm/init.c:88:13: warning: no previous prototype for 'setup_arch_memory' [-Wmissing-prototypes]
>       88 | void __init setup_arch_memory(void)
>          |             ^~~~~~~~~~~~~~~~~
>    In file included from <command-line>:
>    arch/arc/mm/init.c: In function 'mem_init':

I can't reproduce them anymore.


>>> include/linux/compiler_types.h:328:45: error: call to '__compiletime_assert_315' declared with attribute error: BUILD_BUG_ON failed: (PTRS_PER_PTE * sizeof(pte_t)) > PAGE_SIZE
>      328 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
>          |                                             ^
>    include/linux/compiler_types.h:309:25: note: in definition of macro '__compiletime_assert'
>      309 |                         prefix ## suffix();                             \
>          |                         ^~~~~~
>    include/linux/compiler_types.h:328:9: note: in expansion of macro '_compiletime_assert'
>      328 |         _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/arc/mm/init.c:194:9: note: in expansion of macro 'BUILD_BUG_ON'
>      194 |         BUILD_BUG_ON((PTRS_PER_PTE * sizeof(pte_t)) > PAGE_SIZE);
>          |         ^~~~~~~~~~~~

Posted a patch for this [1]

[1] http://lists.infradead.org/pipermail/linux-snps-arc/2024-October/008319.html

Thx,
-Vineet


>
>
> vim +/__compiletime_assert_315 +328 include/linux/compiler_types.h
>
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  314  
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  315  #define _compiletime_assert(condition, msg, prefix, suffix) \
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  316  	__compiletime_assert(condition, msg, prefix, suffix)
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  317  
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  318  /**
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  319   * compiletime_assert - break build and emit msg if condition is false
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  320   * @condition: a compile-time constant condition to check
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  321   * @msg:       a message to emit if condition is false
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  322   *
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  323   * In tradition of POSIX assert, this macro will break the build if the
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  324   * supplied condition is *false*, emitting the supplied error message if the
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  325   * compiler has support to do so.
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  326   */
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  327  #define compiletime_assert(condition, msg) \
> eb5c2d4b45e3d2 Will Deacon 2020-07-21 @328  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
> eb5c2d4b45e3d2 Will Deacon 2020-07-21  329  
>
> :::::: The code at line 328 was first introduced by commit
> :::::: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h
>
> :::::: TO: Will Deacon <will at kernel.org>
> :::::: CC: Will Deacon <will at kernel.org>
>