[peterz-queue:locking/atomics 7/13] include/linux/compiler.h:315:38: error: call to '__compiletime_assert_323' declared with attribute error: Unsupported access size for {READ, WRITE}_ONCE().

[peterz-queue:locking/atomics 7/13] include/linux/compiler.h:315:38: error: call to '__compiletime_assert_323' declared with attribute error: Unsupported access size for {READ, WRITE}_ONCE().

[kbuild test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git locking/atomics
head:   3c63b288c6c2a5f82e2c11e474e7f63902ed47ab
commit: 1b85c64eab21d1e277c1cc6643359380515ed525 [7/13] READ_ONCE: Enforce atomicity for {READ,WRITE}_ONCE() memory accesses
config: sparc-randconfig-a001-20200207 (attached as .config)
compiler: sparc-linux-gcc (GCC) 7.5.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 1b85c64eab21d1e277c1cc6643359380515ed525
        # save the attached .config to linux build tree
        GCC_VERSION=7.5.0 make.cross ARCH=sparc 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from include/linux/kernel.h:11:0,
                    from mm/gup.c:2:
   mm/gup.c: In function 'follow_pmd_mask.isra.49':
>> include/linux/compiler.h:315:38: error: call to '__compiletime_assert_323' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
                                         ^
   include/linux/compiler.h:296:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler.h:315:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:328:2: note: in expansion of macro 'compiletime_assert'
     compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
     ^~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:221:2: note: in expansion of macro 'compiletime_assert_rwonce_type'
     compiletime_assert_rwonce_type(x);    \
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:225:22: note: in expansion of macro 'READ_ONCE_NOCHECK'
    #define READ_ONCE(x) READ_ONCE_NOCHECK(x)
                         ^~~~~~~~~~~~~~~~~
   mm/gup.c:323:11: note: in expansion of macro 'READ_ONCE'
     pmdval = READ_ONCE(*pmd);
              ^~~~~~~~~
   include/linux/compiler.h:315:38: error: call to '__compiletime_assert_348' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
                                         ^
   include/linux/compiler.h:296:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler.h:315:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:328:2: note: in expansion of macro 'compiletime_assert'
     compiletime_assert(__native_word(t) || sizeof(t) == sizeof(long long), \
     ^~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:221:2: note: in expansion of macro 'compiletime_assert_rwonce_type'
     compiletime_assert_rwonce_type(x);    \
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:225:22: note: in expansion of macro 'READ_ONCE_NOCHECK'
    #define READ_ONCE(x) READ_ONCE_NOCHECK(x)
                         ^~~~~~~~~~~~~~~~~
   mm/gup.c:348:12: note: in expansion of macro 'READ_ONCE'
      pmdval = READ_ONCE(*pmd);
               ^~~~~~~~~

vim +/__compiletime_assert_323 +315 include/linux/compiler.h

9a8ab1c39970a4 Daniel Santos 2013-02-21  301  
9a8ab1c39970a4 Daniel Santos 2013-02-21  302  #define _compiletime_assert(condition, msg, prefix, suffix) \
9a8ab1c39970a4 Daniel Santos 2013-02-21  303  	__compiletime_assert(condition, msg, prefix, suffix)
9a8ab1c39970a4 Daniel Santos 2013-02-21  304  
9a8ab1c39970a4 Daniel Santos 2013-02-21  305  /**
9a8ab1c39970a4 Daniel Santos 2013-02-21  306   * compiletime_assert - break build and emit msg if condition is false
9a8ab1c39970a4 Daniel Santos 2013-02-21  307   * @condition: a compile-time constant condition to check
9a8ab1c39970a4 Daniel Santos 2013-02-21  308   * @msg:       a message to emit if condition is false
9a8ab1c39970a4 Daniel Santos 2013-02-21  309   *
9a8ab1c39970a4 Daniel Santos 2013-02-21  310   * In tradition of POSIX assert, this macro will break the build if the
9a8ab1c39970a4 Daniel Santos 2013-02-21  311   * supplied condition is *false*, emitting the supplied error message if the
9a8ab1c39970a4 Daniel Santos 2013-02-21  312   * compiler has support to do so.
9a8ab1c39970a4 Daniel Santos 2013-02-21  313   */
9a8ab1c39970a4 Daniel Santos 2013-02-21  314  #define compiletime_assert(condition, msg) \
9a8ab1c39970a4 Daniel Santos 2013-02-21 @315  	_compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
9a8ab1c39970a4 Daniel Santos 2013-02-21  316  

:::::: The code at line 315 was first introduced by commit
:::::: 9a8ab1c39970a4938a72d94e6fd13be88a797590 bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG

:::::: TO: Daniel Santos <daniel.santos@pobox.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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