3.5.7.31 -stable review patch. If anyone has any objections, please let me know.
------------------
From: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
commit 85eae82a0855d49852b87deac8653e4ebc8b291f upstream.
The console_cpu_notify() function runs with interrupts disabled in the
CPU_DYING case. It therefore cannot block, for example, as will happen
when it calls console_lock(). Therefore, remove the CPU_DYING leg of
the switch statement to avoid this problem.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Guillaume Morin <guillaume@xxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
kernel/printk.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/kernel/printk.c b/kernel/printk.c
index e959512..0d430b1 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1827,7 +1827,6 @@ static int __cpuinit console_cpu_notify(struct notifier_block *self,
switch (action) {
case CPU_ONLINE:
case CPU_DEAD:
- case CPU_DYING:
case CPU_DOWN_FAILED:
case CPU_UP_CANCELED:
console_lock();
--
1.9.0
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