3 files changed, 10 insertions, 14 deletions

diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index 3c8b25e6c345..1fd8f2193ed8 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -399,6 +399,7 @@ sclp_tod_from_jiffies(unsigned long jiffies)
 void
 sclp_sync_wait(void)
 {
+	unsigned long long old_tick;
 	unsigned long flags;
 	unsigned long cr0, cr0_sync;
 	u64 timeout;
@@ -419,11 +420,12 @@ sclp_sync_wait(void)
 	if (!irq_context)
 		local_bh_disable();
 	/* Enable service-signal interruption, disable timer interrupts */
+	old_tick = local_tick_disable();
 	trace_hardirqs_on();
 	__ctl_store(cr0, 0, 0);
 	cr0_sync = cr0;
+	cr0_sync &= 0xffff00a0;
 	cr0_sync |= 0x00000200;
-	cr0_sync &= 0xFFFFF3AC;
 	__ctl_load(cr0_sync, 0, 0);
 	__raw_local_irq_stosm(0x01);
 	/* Loop until driver state indicates finished request */
@@ -439,9 +441,9 @@ sclp_sync_wait(void)
 	__ctl_load(cr0, 0, 0);
 	if (!irq_context)
 		_local_bh_enable();
+	local_tick_enable(old_tick);
 	local_irq_restore(flags);
 }
-
 EXPORT_SYMBOL(sclp_sync_wait);
 
 /* Dispatch changes in send and receive mask to registered listeners. */
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index 0c2b77493db4..eb5f1b8bc57f 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -427,6 +427,8 @@ static int sclp_mem_notifier(struct notifier_block *nb,
 			sclp_attach_storage(id);
 	switch (action) {
 	case MEM_ONLINE:
+	case MEM_GOING_OFFLINE:
+	case MEM_CANCEL_OFFLINE:
 		break;
 	case MEM_GOING_ONLINE:
 		rc = sclp_mem_change_state(start, size, 1);
@@ -434,6 +436,9 @@ static int sclp_mem_notifier(struct notifier_block *nb,
 	case MEM_CANCEL_ONLINE:
 		sclp_mem_change_state(start, size, 0);
 		break;
+	case MEM_OFFLINE:
+		sclp_mem_change_state(start, size, 0);
+		break;
 	default:
 		rc = -EINVAL;
 		break;
diff --git a/drivers/s390/char/sclp_config.c b/drivers/s390/char/sclp_config.c
index fff4ff485d9b..4cebd6ee6d27 100644
--- a/drivers/s390/char/sclp_config.c
+++ b/drivers/s390/char/sclp_config.c
@@ -8,7 +8,6 @@
 #include <linux/init.h>
 #include <linux/errno.h>
 #include <linux/cpu.h>
-#include <linux/kthread.h>
 #include <linux/sysdev.h>
 #include <linux/workqueue.h>
 #include <asm/smp.h>
@@ -41,19 +40,9 @@ static void sclp_cpu_capability_notify(struct work_struct *work)
 	put_online_cpus();
 }
 
-static int sclp_cpu_kthread(void *data)
-{
-	smp_rescan_cpus();
-	return 0;
-}
-
 static void __ref sclp_cpu_change_notify(struct work_struct *work)
 {
-	/* Can't call smp_rescan_cpus() from  workqueue context since it may
-	 * deadlock in case of cpu hotplug. So we have to create a kernel
-	 * thread in order to call it.
-	 */
-	kthread_run(sclp_cpu_kthread, NULL, "cpu_rescan");
+	smp_rescan_cpus();
 }
 
 static void sclp_conf_receiver_fn(struct evbuf_header *evbuf)