workqueue: workqueue_cpu_callback() should be cpu_notifier instead of hotcpu_notifier
Commit 6ee0578b (workqueue: mark init_workqueues as early_initcall)
made workqueue SMP initialization depend on workqueue_cpu_callback(),
which however was registered as hotcpu_notifier() and didn't get
called if CONFIG_HOTPLUG_CPU is not set. This made gcwqs on non-boot
CPUs not create their initial workers leading to boot failures. Fix
it by making it a cpu_notifier.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-and-bisected-by: walt <w41ter@gmail.com>
Tested-by: Markus Trippelsdorf <markus@trippelsdorf.de>
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index da6c482..2994a0e 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -3527,7 +3527,7 @@
unsigned int cpu;
int i;
- hotcpu_notifier(workqueue_cpu_callback, CPU_PRI_WORKQUEUE);
+ cpu_notifier(workqueue_cpu_callback, CPU_PRI_WORKQUEUE);
/* initialize gcwqs */
for_each_gcwq_cpu(cpu) {