linux-kernel - [linux-rt-devel:linux-5.13.y-rt-testing 204/232] kernel/locking/spinlock_rt.c:244:13: warning: no previous prototype for 'rt_rwlock_is

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Message-ID: <202108061305.tWe3eTtc-lkp@intel.com>
Date:   Fri, 6 Aug 2021 13:32:14 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [linux-rt-devel:linux-5.13.y-rt-testing 204/232]
 kernel/locking/spinlock_rt.c:244:13: warning: no previous prototype for
 'rt_rwlock_is_contended'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.13.y-rt-testing
head:   ef625e4b904469d3c5d6962b36abaed37f49db62
commit: 4d507329b3b9318f8fddbc1508ce38d324b3325a [204/232] x86: Enable RT also on 32bit
config: i386-randconfig-r005-20210806 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/commit/?id=4d507329b3b9318f8fddbc1508ce38d324b3325a
        git remote add linux-rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
        git fetch --no-tags linux-rt-devel linux-5.13.y-rt-testing
        git checkout 4d507329b3b9318f8fddbc1508ce38d324b3325a
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

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 >>):

>> kernel/locking/spinlock_rt.c:244:13: warning: no previous prototype for 'rt_rwlock_is_contended' [-Wmissing-prototypes]
     244 | int __sched rt_rwlock_is_contended(rwlock_t *rwlock)
         |             ^~~~~~~~~~~~~~~~~~~~~~


vim +/rt_rwlock_is_contended +244 kernel/locking/spinlock_rt.c

387b12793ce0fa Thomas Gleixner 2021-07-06  243  
387b12793ce0fa Thomas Gleixner 2021-07-06 @244  int __sched rt_rwlock_is_contended(rwlock_t *rwlock)
387b12793ce0fa Thomas Gleixner 2021-07-06  245  {
387b12793ce0fa Thomas Gleixner 2021-07-06  246  	return rw_base_is_contended(&rwlock->rwbase);
387b12793ce0fa Thomas Gleixner 2021-07-06  247  }
387b12793ce0fa Thomas Gleixner 2021-07-06  248  EXPORT_SYMBOL(rt_rwlock_is_contended);
387b12793ce0fa Thomas Gleixner 2021-07-06  249  

:::::: The code at line 244 was first introduced by commit
:::::: 387b12793ce0faedbfc4563aaf557f664c95f1a9 locking/rwlock: Provide RT variant

:::::: TO: Thomas Gleixner <tglx@...utronix.de>
:::::: CC: Thomas Gleixner <tglx@...utronix.de>

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

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