linux-kernel - [rcu:dev 117/117] include/linux/rcutiny.h:99:2: error: implicit declaration of function 'rcu_sched_qs'; did you mean 'rcu_tasks

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Date:   Tue, 3 Jul 2018 08:51:50 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: [rcu:dev 117/117] include/linux/rcutiny.h:99:2: error: implicit
 declaration of function 'rcu_sched_qs'; did you mean 'rcu_tasks_qs'?

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
head:   673d4e1483611783d502fe63317483b294f1bba0
commit: 673d4e1483611783d502fe63317483b294f1bba0 [117/117] rcu: Define RCU-sched API in terms of RCU for Tree RCU PREEMPT builds
config: i386-randconfig-x079-201826 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
        git checkout 673d4e1483611783d502fe63317483b294f1bba0
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from include/linux/rcupdate.h:206:0,
                    from include/linux/srcu.h:33,
                    from include/linux/notifier.h:16,
                    from include/linux/memory_hotplug.h:7,
                    from include/linux/mmzone.h:777,
                    from include/linux/gfp.h:6,
                    from include/linux/slab.h:15,
                    from include/linux/crypto.h:24,
                    from arch/x86/kernel/asm-offsets.c:9:
   include/linux/rcutiny.h: In function 'rcu_softirq_qs':
>> include/linux/rcutiny.h:99:2: error: implicit declaration of function 'rcu_sched_qs'; did you mean 'rcu_tasks_qs'? [-Werror=implicit-function-declaration]
     rcu_sched_qs();
     ^~~~~~~~~~~~
     rcu_tasks_qs
   cc1: some warnings being treated as errors
   make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +99 include/linux/rcutiny.h

486e2593 Paul E. McKenney 2012-01-06   96  
d8f2ea55 Paul E. McKenney 2018-06-28   97  static inline void rcu_softirq_qs(void)
d8f2ea55 Paul E. McKenney 2018-06-28   98  {
d8f2ea55 Paul E. McKenney 2018-06-28  @99  	rcu_sched_qs();
d8f2ea55 Paul E. McKenney 2018-06-28  100  }
d8f2ea55 Paul E. McKenney 2018-06-28  101  

:::::: The code at line 99 was first introduced by commit
:::::: d8f2ea55020ce51d8ab414b900dfb27a7fe5b71d rcu: Apply RCU-bh QSes to RCU-sched and RCU-preempt when safe

:::::: TO: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
:::::: CC: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

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