linux-kernel - [tglx-devel:rtmutex 12/62] include/linux/rtmutex.h:76:13: warning: excess elements in struct initializer

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Date:   Wed, 28 Jul 2021 03:44:18 +0800
From:   kernel test robot <lkp@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [tglx-devel:rtmutex 12/62] include/linux/rtmutex.h:76:13: warning:
 excess elements in struct initializer

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git rtmutex
head:   464d92f29d4fc8581adb0dc25bb8c1d108452fa6
commit: 62ee7142ca57390ba70945e6180e05f4fb1fc73b [12/62] rtmutex: Split out the inner parts of struct rtmutex
config: m68k-buildonly-randconfig-r003-20210727 (attached as .config)
compiler: m68k-linux-gcc (GCC) 10.3.0
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/tglx/devel.git/commit/?id=62ee7142ca57390ba70945e6180e05f4fb1fc73b
        git remote add tglx-devel https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git
        git fetch --no-tags tglx-devel rtmutex
        git checkout 62ee7142ca57390ba70945e6180e05f4fb1fc73b
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash kernel/locking/

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

All warnings (new ones prefixed by >>):

   In file included from kernel/locking/locktorture.c:25:
   include/linux/rtmutex.h:76:13: error: implicit declaration of function '__RT_MUTEX_BASE_INITIALIZE' [-Werror=implicit-function-declaration]
      76 |  .rtmutex = __RT_MUTEX_BASE_INITIALIZE(mutexname.rtmutex) \
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/rtmutex.h:81:30: note: in expansion of macro '__RT_MUTEX_INITIALIZER'
      81 |  struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname)
         |                              ^~~~~~~~~~~~~~~~~~~~~~
   kernel/locking/locktorture.c:468:8: note: in expansion of macro 'DEFINE_RT_MUTEX'
     468 | static DEFINE_RT_MUTEX(torture_rtmutex);
         |        ^~~~~~~~~~~~~~~
>> include/linux/rtmutex.h:76:13: warning: excess elements in struct initializer
      76 |  .rtmutex = __RT_MUTEX_BASE_INITIALIZE(mutexname.rtmutex) \
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/rtmutex.h:81:30: note: in expansion of macro '__RT_MUTEX_INITIALIZER'
      81 |  struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname)
         |                              ^~~~~~~~~~~~~~~~~~~~~~
   kernel/locking/locktorture.c:468:8: note: in expansion of macro 'DEFINE_RT_MUTEX'
     468 | static DEFINE_RT_MUTEX(torture_rtmutex);
         |        ^~~~~~~~~~~~~~~
   include/linux/rtmutex.h:76:13: note: (near initialization for 'torture_rtmutex.rtmutex.wait_lock.raw_lock')
      76 |  .rtmutex = __RT_MUTEX_BASE_INITIALIZE(mutexname.rtmutex) \
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/rtmutex.h:81:30: note: in expansion of macro '__RT_MUTEX_INITIALIZER'
      81 |  struct rt_mutex mutexname = __RT_MUTEX_INITIALIZER(mutexname)
         |                              ^~~~~~~~~~~~~~~~~~~~~~
   kernel/locking/locktorture.c:468:8: note: in expansion of macro 'DEFINE_RT_MUTEX'
     468 | static DEFINE_RT_MUTEX(torture_rtmutex);
         |        ^~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +76 include/linux/rtmutex.h

    73	
    74	#define __RT_MUTEX_INITIALIZER(mutexname)				\
    75	{									\
  > 76		.rtmutex = __RT_MUTEX_BASE_INITIALIZE(mutexname.rtmutex)	\
    77		__DEP_MAP_RT_MUTEX_INITIALIZER(mutexname)			\
    78	}
    79	

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

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