linux-kernel - [rcu:rcu/next 66/109] kernel/rcu/srcu.c:516:15: error: redefinition of 'srcu_batches

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Date:   Sun, 11 Jun 2017 09:16:32 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org
Subject: [rcu:rcu/next 66/109] kernel/rcu/srcu.c:516:15: error: redefinition
 of 'srcu_batches_completed'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head:   0d02a83770da1e677b09192a22ae93a9788badcd
commit: 5a0465e17a18c467b712a816985b7b8dd8d10c16 [66/109] srcu: Shrink srcu.h by moving docbook and private function
config: mn10300-allmodconfig (attached as .config)
compiler: am33_2.0-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 5a0465e17a18c467b712a816985b7b8dd8d10c16
        # save the attached .config to linux build tree
        make.cross ARCH=mn10300 

Note: the rcu/rcu/next HEAD 0d02a83770da1e677b09192a22ae93a9788badcd builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

>> kernel/rcu/srcu.c:516:15: error: redefinition of 'srcu_batches_completed'
    unsigned long srcu_batches_completed(struct srcu_struct *sp)
                  ^~~~~~~~~~~~~~~~~~~~~~
   In file included from kernel/rcu/srcu.c:39:0:
   kernel/rcu/rcu.h:495:29: note: previous definition of 'srcu_batches_completed' was here
    static inline unsigned long srcu_batches_completed(struct srcu_struct *sp)
                                ^~~~~~~~~~~~~~~~~~~~~~

vim +/srcu_batches_completed +516 kernel/rcu/srcu.c

621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  510   * srcu_batches_completed - return batches completed.
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  511   * @sp: srcu_struct on which to report batch completion.
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  512   *
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  513   * Report the number of batches, correlated with, but not necessarily
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  514   * precisely the same as, the number of grace periods that have elapsed.
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  515   */
a5c198f4 kernel/rcu/srcu.c Paul E. McKenney 2014-11-23 @516  unsigned long srcu_batches_completed(struct srcu_struct *sp)
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  517  {
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  518  	return sp->completed;
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  519  }

:::::: The code at line 516 was first introduced by commit
:::::: a5c198f4f7da6cc48116ca239c59c9f44b753364 rcu: Expand SRCU ->completed to 64 bits

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

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