linux-kernel - [PATCH 4/4] padata: Use get_online_cpus/put_online_cpus in padata

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Message-ID: <20100514114646.GE2184@secunet.com>
Date:	Fri, 14 May 2010 13:46:46 +0200
From:	Steffen Klassert <steffen.klassert@...unet.com>
To:	Herbert Xu <herbert@...dor.apana.org.au>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org
Subject: [PATCH 4/4] 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@...unet.com>
---
 kernel/padata.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/kernel/padata.c b/kernel/padata.c
index 629bef3..1f40560 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);
-- 
1.5.6.5

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