linux-kernel - include/linux/compiler_types.h:352:45: error: call to '__compiletime_assert_481' declared with attribute error: Please avoid flushing system_unbound

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Date:   Tue, 17 May 2022 04:24:34 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        0day robot <lkp@...el.com>
Subject: include/linux/compiler_types.h:352:45: error: call to
 '__compiletime_assert_481' declared with attribute error: Please avoid
 flushing system_unbound_wq.

tree:   https://github.com/intel-lab-lkp/linux/commits/UPDATE-20220516-093322/Tetsuo-Handa/checkpatch-warn-about-flushing-system-wide-workqueues/20220425-073327
head:   cd007363b7985a824de0ec5e05f0cb0705e59c88
commit: cd007363b7985a824de0ec5e05f0cb0705e59c88 workqueue: Wrap flush_workqueue() using a macro
date:   18 hours ago
config: arm-randconfig-r002-20220516 (https://download.01.org/0day-ci/archive/20220517/202205170301.QHEka2f9-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.3.0
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://github.com/intel-lab-lkp/linux/commit/cd007363b7985a824de0ec5e05f0cb0705e59c88
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review UPDATE-20220516-093322/Tetsuo-Handa/checkpatch-warn-about-flushing-system-wide-workqueues/20220425-073327
        git checkout cd007363b7985a824de0ec5e05f0cb0705e59c88
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/infiniband/core/

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

All errors (new ones prefixed by >>):

   In file included from <command-line>:
   drivers/infiniband/core/device.c: In function 'ib_core_cleanup':
>> include/linux/compiler_types.h:352:45: error: call to '__compiletime_assert_481' declared with attribute error: Please avoid flushing system_unbound_wq.
     352 |         _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
         |                                             ^
   include/linux/compiler_types.h:333:25: note: in definition of macro '__compiletime_assert'
     333 |                         prefix ## suffix();                             \
         |                         ^~~~~~
   include/linux/compiler_types.h:352:9: note: in expansion of macro '_compiletime_assert'
     352 |         _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/workqueue.h:682:9: note: in expansion of macro 'BUILD_BUG_ON_MSG'
     682 |         BUILD_BUG_ON_MSG(__builtin_constant_p(&(wq) == &system_unbound_wq) && \
         |         ^~~~~~~~~~~~~~~~
   drivers/infiniband/core/device.c:2857:9: note: in expansion of macro 'flush_workqueue'
    2857 |         flush_workqueue(system_unbound_wq);
         |         ^~~~~~~~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for NET_DSA_SMSC_LAN9303
   Depends on NETDEVICES && NET_DSA && (VLAN_8021Q || VLAN_8021Q
   Selected by
   - NET_DSA_SMSC_LAN9303_I2C && NETDEVICES && NET_DSA && I2C
   - NET_DSA_SMSC_LAN9303_MDIO && NETDEVICES && NET_DSA


vim +/__compiletime_assert_481 +352 include/linux/compiler_types.h

eb5c2d4b45e3d2d Will Deacon 2020-07-21  338  
eb5c2d4b45e3d2d Will Deacon 2020-07-21  339  #define _compiletime_assert(condition, msg, prefix, suffix) \
eb5c2d4b45e3d2d Will Deacon 2020-07-21  340  	__compiletime_assert(condition, msg, prefix, suffix)
eb5c2d4b45e3d2d Will Deacon 2020-07-21  341  
eb5c2d4b45e3d2d Will Deacon 2020-07-21  342  /**
eb5c2d4b45e3d2d Will Deacon 2020-07-21  343   * compiletime_assert - break build and emit msg if condition is false
eb5c2d4b45e3d2d Will Deacon 2020-07-21  344   * @condition: a compile-time constant condition to check
eb5c2d4b45e3d2d Will Deacon 2020-07-21  345   * @msg:       a message to emit if condition is false
eb5c2d4b45e3d2d Will Deacon 2020-07-21  346   *
eb5c2d4b45e3d2d Will Deacon 2020-07-21  347   * In tradition of POSIX assert, this macro will break the build if the
eb5c2d4b45e3d2d Will Deacon 2020-07-21  348   * supplied condition is *false*, emitting the supplied error message if the
eb5c2d4b45e3d2d Will Deacon 2020-07-21  349   * compiler has support to do so.
eb5c2d4b45e3d2d Will Deacon 2020-07-21  350   */
eb5c2d4b45e3d2d Will Deacon 2020-07-21  351  #define compiletime_assert(condition, msg) \
eb5c2d4b45e3d2d Will Deacon 2020-07-21 @352  	_compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
eb5c2d4b45e3d2d Will Deacon 2020-07-21  353  

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