include/linux/compiler_types.h:338:38: error: call to '__compiletime_assert_571' declared with attribute error: must increase SMC_WR_BUF_SIZE to at least sizeof(struct smc_llc_msg)

[kernel test robot]

Hi Will,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4ef8451b332662d004df269d4cdeb7d9f31419b5
commit: eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5 compiler.h: Move compiletime_assert() macros into compiler_types.h
date:   4 months ago
config: arm-randconfig-r015-20201103 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout eb5c2d4b45e3d2d5d052ea6b8f1463976b1020d5
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   net/smc/smc_llc.c: In function 'smc_llc_add_pending_send':
>> include/linux/compiler_types.h:338:38: error: call to '__compiletime_assert_571' declared with attribute error: must increase SMC_WR_BUF_SIZE to at least sizeof(struct smc_llc_msg)
     338 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                      ^
   include/linux/compiler_types.h:319:4: note: in definition of macro '__compiletime_assert'
     319 |    prefix ## suffix();    \
         |    ^~~~~~
   include/linux/compiler_types.h:338:2: note: in expansion of macro '_compiletime_assert'
     338 |  _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)
         |                                     ^~~~~~~~~~~~~~~~~~
   net/smc/smc_llc.c:348:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     348 |  BUILD_BUG_ON_MSG(
         |  ^~~~~~~~~~~~~~~~
   include/linux/compiler_types.h:338:38: error: call to '__compiletime_assert_572' declared with attribute error: must adapt SMC_WR_TX_SIZE to sizeof(struct smc_llc_msg); if not all smc_wr upper layer protocols use the same message size any more, must start to set link->wr_tx_sges[i].length on each individual smc_wr_tx_send()
     338 |  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                      ^
   include/linux/compiler_types.h:319:4: note: in definition of macro '__compiletime_assert'
     319 |    prefix ## suffix();    \
         |    ^~~~~~
   include/linux/compiler_types.h:338:2: note: in expansion of macro '_compiletime_assert'
     338 |  _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)
         |                                     ^~~~~~~~~~~~~~~~~~
   net/smc/smc_llc.c:351:2: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     351 |  BUILD_BUG_ON_MSG(
         |  ^~~~~~~~~~~~~~~~
   In file included from include/linux/bitmap.h:9,
                    from include/linux/nodemask.h:95,
                    from include/linux/mmzone.h:17,
                    from include/linux/gfp.h:6,
                    from include/linux/mm.h:10,
                    from include/linux/bvec.h:13,
                    from include/linux/skbuff.h:17,
                    from include/linux/tcp.h:17,
                    from include/net/tcp.h:20,
                    from net/smc/smc_llc.c:13:
   In function 'memcpy',
       inlined from 'smc_llc_send_message_wait' at net/smc/smc_llc.c:577:2,
       inlined from 'smc_llc_send_link_delete_all' at net/smc/smc_llc.c:1263:8:
   include/linux/string.h:402:4: error: call to '__read_overflow2' declared with attribute error: detected read beyond size of object passed as 2nd parameter
     402 |    __read_overflow2();
         |    ^~~~~~~~~~~~~~~~~~

vim +/__compiletime_assert_571 +338 include/linux/compiler_types.h

   324	
   325	#define _compiletime_assert(condition, msg, prefix, suffix) \
   326		__compiletime_assert(condition, msg, prefix, suffix)
   327	
   328	/**
   329	 * compiletime_assert - break build and emit msg if condition is false
   330	 * @condition: a compile-time constant condition to check
   331	 * @msg:       a message to emit if condition is false
   332	 *
   333	 * In tradition of POSIX assert, this macro will break the build if the
   334	 * supplied condition is *false*, emitting the supplied error message if the
   335	 * compiler has support to do so.
   336	 */
   337	#define compiletime_assert(condition, msg) \
 > 338		_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
   339	

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

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