tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git 
rcu/dev
head:   a57af56830b510f3dae7fa26313058c192f38f94
commit: a57af56830b510f3dae7fa26313058c192f38f94 [27/27] rcu: Parallelize 
expedited grace-period initialization
config: i386-randconfig-x004-201807 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        git checkout a57af56830b510f3dae7fa26313058c192f38f94
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from kernel/rcu/tree.c:4205:0:
   kernel/rcu/tree_exp.h: In function 'sync_rcu_exp_select_cpus':
>> kernel/rcu/tree_exp.h:461:16: error: implicit declaration of function 
>> 'ACCESS_ONCE'; did you mean '__READ_ONCE'? 
>> [-Werror=implicit-function-declaration]
     bool serial = ACCESS_ONCE(rcu_gp_workqueue);
                   ^~~~~~~~~~~
                   __READ_ONCE
   cc1: some warnings being treated as errors

vim +461 kernel/rcu/tree_exp.h

   452  
   453  /*
   454   * Select the nodes that the upcoming expedited grace period needs
   455   * to wait for.
   456   */
   457  static void sync_rcu_exp_select_cpus(struct rcu_state *rsp,
   458                                       smp_call_func_t func)
   459  {
   460          struct rcu_node *rnp;
 > 461          bool serial = ACCESS_ONCE(rcu_gp_workqueue);
   462  
   463          trace_rcu_exp_grace_period(rsp->name, 
rcu_exp_gp_seq_endval(rsp), TPS("reset"));
   464          sync_exp_reset_tree(rsp);
   465          trace_rcu_exp_grace_period(rsp->name, 
rcu_exp_gp_seq_endval(rsp), TPS("select"));
   466  
   467          /* Schedule work for each leaf rcu_node structure. */
   468          rcu_for_each_leaf_node(rsp, rnp) {
   469                  rnp->rew.rew_func = func;
   470                  rnp->rew.rew_rsp = rsp;
   471                  if (serial) {
   472                          func(&rnp->rew.rew_work); /* No workqueues yet. 
*/
   473                          continue;
   474                  }
   475                  INIT_WORK(&rnp->rew.rew_work, 
sync_rcu_exp_select_node_cpus);
   476                  queue_work_on(rnp->grplo, rcu_gp_workqueue, 
&rnp->rew.rew_work);
   477          }
   478  
   479          /* Wait for workqueue jobs (if any) to complete. */
   480          if (!serial)
   481                  rcu_for_each_leaf_node(rsp, rnp)
   482                          flush_work(&rnp->rew.rew_work);
   483  }
   484  

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Attachment: .config.gz
Description: application/gzip

Reply via email to