linux-kernel - [PATCH v2 tip/core/rcu 03/22] blackfin: Use common outgoing-CPU-notification code

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Message-Id: <1426531086-23825-3-git-send-email-paulmck@linux.vnet.ibm.com>
Date:	Mon, 16 Mar 2015 11:37:47 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, laijs@...fujitsu.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,
	dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com,
	bobby.prani@...il.com,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Steven Miao <realmz6@...il.com>,
	<adi-buildroot-devel@...ts.sourceforge.net>
Subject: [PATCH v2 tip/core/rcu 03/22] blackfin: Use common outgoing-CPU-notification code

From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>

This commit removes the open-coded CPU-offline notification with new
common code.  This change avoids calling scheduler code using RCU from
an offline CPU that RCU is ignoring.  This commit is compatible with
the existing code in not checking for timeout during a prior offline
for a given CPU.

Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Steven Miao <realmz6@...il.com>
Cc: <adi-buildroot-devel@...ts.sourceforge.net>
---
 arch/blackfin/mach-common/smp.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c
index 8ad3e90cc8fc..1c7259597395 100644
--- a/arch/blackfin/mach-common/smp.c
+++ b/arch/blackfin/mach-common/smp.c
@@ -413,16 +413,14 @@ int __cpu_disable(void)
 	return 0;
 }
 
-static DECLARE_COMPLETION(cpu_killed);
-
 int __cpu_die(unsigned int cpu)
 {
-	return wait_for_completion_timeout(&cpu_killed, 5000);
+	return cpu_wait_death(cpu, 5);
 }
 
 void cpu_die(void)
 {
-	complete(&cpu_killed);
+	(void)cpu_report_death();
 
 	atomic_dec(&init_mm.mm_users);
 	atomic_dec(&init_mm.mm_count);
-- 
1.8.1.5

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