From mboxrd@z Thu Jan 1 00:00:00 1970 From: jszhang@marvell.com (Jisheng Zhang) Date: Wed, 22 Jun 2016 17:19:27 +0800 Subject: [PATCH] rcu: Use rcu_gp_kthread_wake() to wake up grace period kthreads again Message-ID: <1466587167-3541-1-git-send-email-jszhang@marvell.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org commit abedf8e2419f ("rcu: Use simple wait queues where possible in rcutree") converts wait queues in rcutree to use simple wait queues, but it incorrectly reverts the commit 2aa792e6faf1 ("rcu: Use rcu_gp_kthread_wake() to wake up grace period kthreads"). This patch tries to fix the above issue by useing rcu_gp_kthread_wake() to wake up grace period kthreads again. Signed-off-by: Jisheng Zhang --- kernel/rcu/tree.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index c7f1bc4..c270ce0 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2333,7 +2333,7 @@ static void rcu_report_qs_rsp(struct rcu_state *rsp, unsigned long flags) WARN_ON_ONCE(!rcu_gp_in_progress(rsp)); WRITE_ONCE(rsp->gp_flags, READ_ONCE(rsp->gp_flags) | RCU_GP_FLAG_FQS); raw_spin_unlock_irqrestore_rcu_node(rcu_get_root(rsp), flags); - swake_up(&rsp->gp_wq); /* Memory barrier implied by swake_up() path. */ + rcu_gp_kthread_wake(rsp); } /* @@ -2961,7 +2961,7 @@ static void force_quiescent_state(struct rcu_state *rsp) } WRITE_ONCE(rsp->gp_flags, READ_ONCE(rsp->gp_flags) | RCU_GP_FLAG_FQS); raw_spin_unlock_irqrestore_rcu_node(rnp_old, flags); - swake_up(&rsp->gp_wq); /* Memory barrier implied by swake_up() path. */ + rcu_gp_kthread_wake(rsp); } /* -- 2.8.1