linux-kernel - [rcu:rcu/next 64/99] kernel/rcu/srcu.c:517:15: error: redefinition of 'srcu_batches

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Date:   Tue, 6 Jun 2017 06:22:32 +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 64/99] kernel/rcu/srcu.c:517:15: error: redefinition
 of 'srcu_batches_completed'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/next
head:   5c246613fb794485c9af0c20dff8218abfc848aa
commit: dec7813dfa40f7a48b0f3d9e48fe7bcf0b1b622d [64/99] srcu: Shrink srcu.h by moving docbook and private function
config: x86_64-randconfig-x006-201723 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout dec7813dfa40f7a48b0f3d9e48fe7bcf0b1b622d
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the rcu/rcu/next HEAD 5c246613fb794485c9af0c20dff8218abfc848aa builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

>> kernel/rcu/srcu.c:517:15: 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 +517 kernel/rcu/srcu.c

621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  511   * srcu_batches_completed - return batches completed.
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  512   * @sp: srcu_struct on which to report batch completion.
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  513   *
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  514   * Report the number of batches, correlated with, but not necessarily
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  515   * precisely the same as, the number of grace periods that have elapsed.
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  516   */
a5c198f4 kernel/rcu/srcu.c Paul E. McKenney 2014-11-23 @517  unsigned long srcu_batches_completed(struct srcu_struct *sp)
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  518  {
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  519  	return sp->completed;
621934ee kernel/srcu.c     Paul E. McKenney 2006-10-04  520  }

:::::: The code at line 517 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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