include/linux/compiler_types.h:706:45: error: call to '__compiletime_assert_403' declared with attribute error: min(outarg.size, ((loff_t)(~0UL) << 12) - pos) signedness error

Hi Joanne,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   fce2dfa773ced15f27dd27cd0b482a7473cdcf2a
commit: 25307ca50b815c14a21f82fc5b10e8a621af32ad fuse: simplify logic in fuse_notify_store() and fuse_retrieve()
date:   5 months ago
config: parisc-randconfig-r051-20260717 (https://download.01.org/0day-ci/archive/20260717/[email protected]/config)
compiler: hppa-linux-gcc (GCC) 12.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260717/[email protected]/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
| Fixes: 25307ca50b81 ("fuse: simplify logic in fuse_notify_store() and fuse_retrieve()")
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

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:706:45: error: call to '__compiletime_assert_403' declared with attribute error: min(outarg.size, ((loff_t)(~0UL) << 12) - pos) signedness error
     706 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:687:25: note: in definition of macro '__compiletime_assert'
     687 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:706:9: 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:93:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
      93 |         BUILD_BUG_ON_MSG(!__types_ok(ux, uy),           \
         |         ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:98:9: 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:105:25: note: in expansion of macro '__careful_cmp'
     105 | #define min(x, y)       __careful_cmp(min, x, y)
         |                         ^~~~~~~~~~~~~
   fs/fuse/dev.c:1790:15: note: in expansion of macro 'min'
    1790 |         num = min(outarg.size, MAX_LFS_FILESIZE - pos);
         |               ^~~


vim +/__compiletime_assert_403 +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 <[email protected]>
:::::: CC: Will Deacon <[email protected]>

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