From 3789ae7dcd29fa146b23dc30377925d1f73c8adf Mon Sep 17 00:00:00 2001
From: Steffen Klassert <steffen.klassert@secunet.com>
Date: Wed, 19 May 2010 13:45:35 +1000
Subject: padata: Use get_online_cpus/put_online_cpus in padata_free

Add get_online_cpus/put_online_cpus to ensure that no cpu goes
offline during the flushing of the padata percpu queues.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 kernel/padata.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'kernel/padata.c')

diff --git a/kernel/padata.c b/kernel/padata.c
index ca89dfb69805..b1c9857f8402 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -763,7 +763,10 @@ void padata_free(struct padata_instance *pinst)
 #ifdef CONFIG_HOTPLUG_CPU
 	unregister_hotcpu_notifier(&pinst->cpu_notifier);
 #endif
+	get_online_cpus();
 	padata_flush_queues(pinst->pd);
+	put_online_cpus();
+
 	padata_free_pd(pinst->pd);
 	free_cpumask_var(pinst->cpumask);
 	kfree(pinst);
-- 
cgit