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authorThomas Gleixner <tglx@linutronix.de>2011-06-03 11:13:33 +0200
committerThomas Gleixner <tglx@linutronix.de>2011-06-03 11:13:33 +0200
commit1b054b67d3bfc6dca9f634c104780f3f24ff3eec (patch)
treeaf50fb7333001692879c18474e84ac2736f984d1
parent1fa7b6a29c61358cc2ca6f64cef4aa0e1a7ca74c (diff)
clockevents: Handle empty cpumask gracefully
For UP it's stupid to request an initialized cpumask for the clock event devices. Though we need the mask set even on UP to avoid a horrible ifdeffery especially in the broadcast code. For SMP we can at least try to survive with a warning and set the cpumask of the cpu we're running on. That gives a decent chance to bring the machine up and retrieve the debug info. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Walleij <linus.walleij@linaro.org Cc: Lee Jones <lee.jones@linaro.org> Cc: Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: Stephen Boyd <sboyd@codeaurora.org>
-rw-r--r--kernel/time/clockevents.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index c027d4f602f1..e4c699dfa4e8 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -182,7 +182,10 @@ void clockevents_register_device(struct clock_event_device *dev)
unsigned long flags;
BUG_ON(dev->mode != CLOCK_EVT_MODE_UNUSED);
- BUG_ON(!dev->cpumask);
+ if (!dev->cpumask) {
+ WARN_ON(num_possible_cpus() > 1);
+ dev->cpumask = cpumask_of(smp_processor_id());
+ }
raw_spin_lock_irqsave(&clockevents_lock, flags);