[linux-next:master 3223/3431] include/linux/compiler_types.h:706:38: error: call to '__compiletime_assert_430' declared with attribute error: min(outarg.size, ((loff_t)(~0UL) << 14) - pos) signedness error

[linux-next:master 3223/3431] include/linux/compiler_types.h:706:38: error: call to '__compiletime_assert_430' declared with attribute error: min(outarg.size, ((loff_t)(~0UL) << 14) - pos) signedness error

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   c025f6cf4209e1542ec2afebe49f42bbaf1a5c7b
commit: db64b9107f146940606d512f1d6214323b905565 [3223/3431] fuse: simplify logic in fuse_notify_store() and fuse_retrieve()
config: arc-randconfig-002-20260304 (https://download.01.org/0day-ci/archive/20260304/202603042237.M1MDFjps-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 9.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260304/202603042237.M1MDFjps-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/202603042237.M1MDFjps-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   fs/fuse/dev.c: In function 'fuse_notify_store':
>> include/linux/compiler_types.h:706:38: error: call to '__compiletime_assert_430' declared with attribute error: min(outarg.size, ((loff_t)(~0UL) << 14) - pos) signedness error
     706 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                      ^
   include/linux/compiler_types.h:687:4: note: in definition of macro '__compiletime_assert'
     687 |    prefix ## suffix();    \
         |    ^~~~~~
   include/linux/compiler_types.h:706:2: note: in expansion of macro '_compiletime_assert'
     706 |  _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/minmax.h:93:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      93 |  BUILD_BUG_ON_MSG(!__types_ok(ux, uy),  \
         |  ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:98:2: note: in expansion of macro '__careful_cmp_once'
      98 |  __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
         |  ^~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:105:19: note: in expansion of macro '__careful_cmp'
     105 | #define min(x, y) __careful_cmp(min, x, y)
         |                   ^~~~~~~~~~~~~
   fs/fuse/dev.c:1790:8: note: in expansion of macro 'min'
    1790 |  num = min(outarg.size, MAX_LFS_FILESIZE - pos);
         |        ^~~


vim +/__compiletime_assert_430 +706 include/linux/compiler_types.h

eb5c2d4b45e3d2d Will Deacon 2020-07-21  692  
eb5c2d4b45e3d2d Will Deacon 2020-07-21  693  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2d Will Deacon 2020-07-21  694  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2d Will Deacon 2020-07-21  695  
eb5c2d4b45e3d2d Will Deacon 2020-07-21  696  /**
eb5c2d4b45e3d2d Will Deacon 2020-07-21  697   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2d Will Deacon 2020-07-21  698   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2d Will Deacon 2020-07-21  699   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2d Will Deacon 2020-07-21  700   *
eb5c2d4b45e3d2d Will Deacon 2020-07-21  701   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2d Will Deacon 2020-07-21  702   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2d Will Deacon 2020-07-21  703   * compiler has support to do so.
eb5c2d4b45e3d2d Will Deacon 2020-07-21  704   */
eb5c2d4b45e3d2d Will Deacon 2020-07-21  705  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2d Will Deacon 2020-07-21 @706  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2d Will Deacon 2020-07-21  707  

:::::: The code at line 706 was first introduced by commit
:::::: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h

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

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [linux-next:master 3223/3431] include/linux/compiler_types.h:706:38: error: call to '__compiletime_assert_430' declared with attribute error: min(outarg.size, ((loff_t)(~0UL) << 14) - pos) signedness error

[Joanne Koong]

On Wed, Mar 4, 2026 at 6:45 AM kernel test robot <lkp@intel.com> wrote:
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   c025f6cf4209e1542ec2afebe49f42bbaf1a5c7b
> commit: db64b9107f146940606d512f1d6214323b905565 [3223/3431] fuse: simplify logic in fuse_notify_store() and fuse_retrieve()
> config: arc-randconfig-002-20260304 (https://download.01.org/0day-ci/archive/20260304/202603042237.M1MDFjps-lkp@intel.com/config)
> compiler: arc-linux-gcc (GCC) 9.5.0
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260304/202603042237.M1MDFjps-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/202603042237.M1MDFjps-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
>    In file included from <command-line>:
>    fs/fuse/dev.c: In function 'fuse_notify_store':
> >> include/linux/compiler_types.h:706:38: error: call to '__compiletime_assert_430' declared with attribute error: min(outarg.size, ((loff_t)(~0UL) << 14) - pos) signedness error
>      706 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
>          |                                      ^
>    include/linux/compiler_types.h:687:4: note: in definition of macro '__compiletime_assert'
>      687 |    prefix ## suffix();    \
>          |    ^~~~~~
>    include/linux/compiler_types.h:706:2: note: in expansion of macro '_compiletime_assert'
>      706 |  _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/minmax.h:93:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
>       93 |  BUILD_BUG_ON_MSG(!__types_ok(ux, uy),  \
>          |  ^~~~~~~~~~~~~~~~
>    include/linux/minmax.h:98:2: note: in expansion of macro '__careful_cmp_once'
>       98 |  __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_))
>          |  ^~~~~~~~~~~~~~~~~~
>    include/linux/minmax.h:105:19: note: in expansion of macro '__careful_cmp'
>      105 | #define min(x, y) __careful_cmp(min, x, y)
>          |                   ^~~~~~~~~~~~~
>    fs/fuse/dev.c:1790:8: note: in expansion of macro 'min'
>     1790 |  num = min(outarg.size, MAX_LFS_FILESIZE - pos);
>          |        ^~~
>

Sorry for missing this - it should be
num = min_t(loff_t, outarg.size, MAX_LFS_FILESIZE - pos);

Do you prefer a follow-up patch fix be sent for this or is it trivial
to fix it up locally in your tree, Miklos?

Thanks,
Joanne