linux-kernel - [linux-rt-devel:linux-5.13.y-rt-rebase 95/222] kernel/locking/rtmutex_api.c:491: warning: expecting prototype for rwsem_rt_mutex_try_lock_nolockdep(). Prototype was for rwsem_rt_mutex

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Message-ID: <202107082354.TMjsPx3Y-lkp@intel.com>
Date:   Thu, 8 Jul 2021 23:14:01 +0800
From:   kernel test robot <lkp@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     clang-built-linux@...glegroups.com, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [linux-rt-devel:linux-5.13.y-rt-rebase 95/222]
 kernel/locking/rtmutex_api.c:491: warning: expecting prototype for
 rwsem_rt_mutex_try_lock_nolockdep(). Prototype was for
 rwsem_rt_mutex_trylock() instead

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.13.y-rt-rebase
head:   7e175e6b59975c8901ad370f7818937f68de45c1
commit: e03cbdcf154eddbc014705b6e2ebacd755d6ab39 [95/222] locking/rtmutex: Provide lockdep less variants of rtmutex interfaces
config: x86_64-randconfig-a015-20210707 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8d69635ed9ecf36fd0ca85906bfde17949671cbe)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/commit/?id=e03cbdcf154eddbc014705b6e2ebacd755d6ab39
        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-rebase
        git checkout e03cbdcf154eddbc014705b6e2ebacd755d6ab39
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=x86_64 SHELL=/bin/bash kernel/locking/ kernel/rcu/

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/rtmutex_api.c:491: warning: expecting prototype for rwsem_rt_mutex_try_lock_nolockdep(). Prototype was for rwsem_rt_mutex_trylock() instead


vim +491 kernel/locking/rtmutex_api.c

   481	
   482	/**
   483	 * rwsem_rt_mutex_try_lock_nolockdep - Try to lock a rt_mutex
   484	 * @lock:      The rt_mutex to be locked
   485	 *
   486	 * The function does no lockdep operations on @lock. The lockdep state
   487	 * changes have to be done on the callsite related to the locking primitive
   488	 * which embeds the rtmutex. Otherwise lockdep has double tracking.
   489	 */
   490	int __sched rwsem_rt_mutex_trylock(struct rt_mutex *lock)
 > 491	{
   492		if (IS_ENABLED(CONFIG_DEBUG_RT_MUTEXES) &&
   493		    WARN_ON_ONCE(in_nmi() | in_hardirq()))
   494				return 0;
   495	
   496		if (likely(rt_mutex_cmpxchg_acquire(lock, NULL, current)))
   497			return 1;
   498	
   499		return rt_mutex_slowtrylock(lock);
   500	}
   501	

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

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