linux-kernel - [PATCH] [54/99] CPUFREQ: Remove cpufreq_stats sysfs entries on module unload.

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Message-Id: <20110727214853.4A6692403FF@tassilo.jf.intel.com>
Date:	Wed, 27 Jul 2011 14:48:53 -0700 (PDT)
From:	Andi Kleen <andi@...stfloor.org>
To:	davej@...hat.com, gregkh@...e.de, ak@...ux.intel.com,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	tim.bird@...sony.com
Subject: [PATCH] [54/99] CPUFREQ: Remove cpufreq_stats sysfs entries on module unload.

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Dave Jones <davej@...hat.com>

commit 13f067537f34456443f61c950cd6dc37d1d5f3ee upstream.

cpufreq_stats leaves behind its sysfs entries, which causes a panic
when something stumbled across them.
(Discovered by unloading cpufreq_stats while powertop was loaded).

Signed-off-by: Dave Jones <davej@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 drivers/cpufreq/cpufreq_stats.c |    1 +
 1 file changed, 1 insertion(+)

Index: linux-2.6.35.y/drivers/cpufreq/cpufreq_stats.c
===================================================================
--- linux-2.6.35.y.orig/drivers/cpufreq/cpufreq_stats.c
+++ linux-2.6.35.y/drivers/cpufreq/cpufreq_stats.c
@@ -388,6 +388,7 @@ static void __exit cpufreq_stats_exit(vo
 	unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
 	for_each_online_cpu(cpu) {
 		cpufreq_stats_free_table(cpu);
+		cpufreq_stats_free_sysfs(cpu);
 	}
 }
 
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