linux-kernel - [PATCH tip/core/rcu 06/41] sparc/oprofile: Convert timer_stop() to use synchronize

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Date:   Sun, 11 Nov 2018 11:43:35 -0800
From:   "Paul E. McKenney" <paulmck@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     mingo@...nel.org, jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org,
        "Paul E. McKenney" <paulmck@...ux.ibm.com>,
        Robert Richter <rric@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        oprofile-list@...ts.sf.net, sparclinux@...r.kernel.org
Subject: [PATCH tip/core/rcu 06/41] sparc/oprofile: Convert timer_stop() to use synchronize_rcu()

Now that synchronize_rcu() waits for preempt-disable regions of code
in addition to explicitly marked RCU read-side critical sections,
synchronize_rcu() can be used in place of synchronize_sched().  This
commit therefore makes that change.

Signed-off-by: Paul E. McKenney <paulmck@...ux.ibm.com>
Cc: Robert Richter <rric@...nel.org>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: <oprofile-list@...ts.sf.net>
Cc: <sparclinux@...r.kernel.org>
---
 arch/sparc/oprofile/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/sparc/oprofile/init.c b/arch/sparc/oprofile/init.c
index f9024bccff16..43730c9b1c86 100644
--- a/arch/sparc/oprofile/init.c
+++ b/arch/sparc/oprofile/init.c
@@ -53,7 +53,7 @@ static void timer_stop(void)
 {
 	nmi_adjust_hz(1);
 	unregister_die_notifier(&profile_timer_exceptions_nb);
-	synchronize_sched();  /* Allow already-started NMIs to complete. */
+	synchronize_rcu();  /* Allow already-started NMIs to complete. */
 }
 
 static int op_nmi_timer_init(struct oprofile_operations *ops)
-- 
2.17.1