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From 38ca21f81217c14749f190f44709d4f5606ff798 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 25 Apr 2013 20:31:49 +0000
Subject: [PATCH 125/174] clockevents: Add module refcount
commit ccf33d6880f39a35158fff66db13000ae4943fac upstream.
We want to be able to remove clockevent modules as well. Add a
refcount so we don't remove a module with an active clock event
device.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Link: http://lkml.kernel.org/r/20130425143436.307435149@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Kim Phillips <kim.phillips@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/time/tick-broadcast.c | 2 ++
kernel/time/tick-common.c | 3 +++
2 files changed, 5 insertions(+)
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -92,6 +92,8 @@ void tick_install_broadcast_device(struc
if (!try_module_get(dev->owner))
return;
+ if (!try_module_get(dev->owner))
+ return;
clockevents_exchange_device(cur, dev);
if (cur)
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -273,6 +273,9 @@ void tick_check_new_device(struct clock_
if (!try_module_get(newdev->owner))
return;
+ if (!try_module_get(newdev->owner))
+ return;
+
/*
* Replace the eventually existing device by the new
* device. If the current device is the broadcast device, do
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