Commit 85eae82a authored by Paul E. McKenney's avatar Paul E. McKenney Committed by Linus Torvalds

printk: Fix scheduling-while-atomic problem in console_cpu_notify()

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: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: default avatarSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 75fa29c7
...@@ -1890,7 +1890,6 @@ static int __cpuinit console_cpu_notify(struct notifier_block *self, ...@@ -1890,7 +1890,6 @@ static int __cpuinit console_cpu_notify(struct notifier_block *self,
switch (action) { switch (action) {
case CPU_ONLINE: case CPU_ONLINE:
case CPU_DEAD: case CPU_DEAD:
case CPU_DYING:
case CPU_DOWN_FAILED: case CPU_DOWN_FAILED:
case CPU_UP_CANCELED: case CPU_UP_CANCELED:
console_lock(); console_lock();
......
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