Commit-ID: 337e9b07db3b8c7f7d68b849df32f434a1a3b831 Gitweb: https://git.kernel.org/tip/337e9b07db3b8c7f7d68b849df32f434a1a3b831 Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxx> AuthorDate: Tue, 6 Nov 2018 19:10:53 -0800 Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxx> CommitDate: Fri, 25 Jan 2019 15:28:22 -0800 sched: Replace call_rcu_sched() with call_rcu() Now that call_rcu()'s callback is not invoked until after all preempt-disable regions of code have completed (in addition to explicitly marked RCU read-side critical sections), call_rcu() can be used in place of call_rcu_sched(). This commit therefore makes that change. While in the area, this commit also updates an outdated header comment for for_each_domain(). Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> --- kernel/sched/sched.h | 2 +- kernel/sched/topology.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index d04530bf251f..6665b9c02e2f 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1260,7 +1260,7 @@ extern void sched_ttwu_pending(void); /* * The domain tree (rq->sd) is protected by RCU's quiescent state transition. - * See detach_destroy_domains: synchronize_sched for details. + * See destroy_sched_domains: call_rcu for details. * * The domain tree of any CPU may only be accessed from within * preempt-disabled sections. diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 3f35ba1d8fde..7d905f55e7fa 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -442,7 +442,7 @@ void rq_attach_root(struct rq *rq, struct root_domain *rd) raw_spin_unlock_irqrestore(&rq->lock, flags); if (old_rd) - call_rcu_sched(&old_rd->rcu, free_rootdomain); + call_rcu(&old_rd->rcu, free_rootdomain); } void sched_get_rd(struct root_domain *rd) @@ -455,7 +455,7 @@ void sched_put_rd(struct root_domain *rd) if (!atomic_dec_and_test(&rd->refcount)) return; - call_rcu_sched(&rd->rcu, free_rootdomain); + call_rcu(&rd->rcu, free_rootdomain); } static int init_rootdomain(struct root_domain *rd)
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