Messages in this thread | | | Date | Fri, 23 Feb 2018 10:10:16 +0800 | From | kbuild test robot <> | Subject | [rcu:rcu/dev 27/27] kernel/rcu/tree_exp.h:461:16: error: implicit declaration of function 'ACCESS_ONCE'; did you mean '__READ_ONCE'? |
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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
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