s390 bux fixes for 2.6.25-rc4.

Index: quilt-2.6/arch/s390/kernel/process.c
===================================================================
@@ -152,6 +152,10 @@ static void default_idle(void)
 	local_mcck_disable();
 	if (test_thread_flag(TIF_MCCK_PENDING)) {
 		local_mcck_enable();
+		/* disable monitor call class 0 */
+		__ctl_clear_bit(8, 15);
+		atomic_notifier_call_chain(&idle_chain, S390_CPU_NOT_IDLE,
+					   hcpu);
 		local_irq_enable();
 		s390_handle_mcck();
 		return;

Index: quilt-2.6/arch/s390/kernel/time.c
===================================================================
@@ -209,8 +209,6 @@ static void stop_hz_timer(void)
  */
 static void start_hz_timer(void)
 {
-	BUG_ON(!in_interrupt());
-
 	if (!cpu_isset(smp_processor_id(), nohz_cpu_mask))
 		return;
 	account_ticks(get_clock());

Index: quilt-2.6/arch/s390/kernel/smp.c
===================================================================
@@ -629,14 +629,8 @@ static int __cpuinit smp_alloc_lowcore(i
 	panic_stack = __get_free_page(GFP_KERNEL);
 	if (!panic_stack || !async_stack)
 		goto out;
-	/*
-	 * Only need to copy the first 512 bytes from address 0. But since
-	 * the compiler emits a warning if src == NULL for memcpy use copy_page
-	 * instead. Copies more than needed but this code is not performance
-	 * critical.
-	 */
-	copy_page(lowcore, &S390_lowcore);
-	memset((void *)lowcore + 512, 0, sizeof(*lowcore) - 512);
+	memcpy(lowcore, &S390_lowcore, 512);
+	memset((char *)lowcore + 512, 0, sizeof(*lowcore) - 512);
 	lowcore->async_stack = async_stack + ASYNC_SIZE;
 	lowcore->panic_stack = panic_stack + PAGE_SIZE;
 

Index: quilt-2.6/drivers/s390/block/dasd_3990_erp.c
===================================================================
@@ -2310,10 +2310,8 @@ static int
 dasd_3990_erp_error_match(struct dasd_ccw_req *cqr1, struct dasd_ccw_req *cqr2)
 {
 
-	/* check failed CCW */
-	if (cqr1->irb.scsw.cpa != cqr2->irb.scsw.cpa) {
-		//	return 0;	/* CCW doesn't match */
-	}
+	if (cqr1->startdev != cqr2->startdev)
+		return 0;
 
 	if (cqr1->irb.esw.esw0.erw.cons != cqr2->irb.esw.esw0.erw.cons)
 		return 0;

Index: quilt-2.6/drivers/s390/block/dasd_proc.c
===================================================================
@@ -62,8 +62,10 @@ dasd_devices_show(struct seq_file *m, vo
 		return 0;
 	if (device->block)
 		block = device->block;
-	else
+	else {
+		dasd_put_device(device);
 		return 0;
+	}
 	/* Print device number. */
 	seq_printf(m, "%s", device->cdev->dev.bus_id);
 	/* Print discipline string. */

Index: quilt-2.6/drivers/s390/char/sclp_vt220.c
===================================================================
@@ -367,7 +367,7 @@ sclp_vt220_timeout(unsigned long data)
 	sclp_vt220_emit_current();
 }
 
-#define BUFFER_MAX_DELAY	HZ/2
+#define BUFFER_MAX_DELAY	HZ/20
 
 /* 
  * Internal implementation of the write function. Write COUNT bytes of data

Index: quilt-2.6/drivers/s390/crypto/ap_bus.c
===================================================================
@@ -490,10 +490,12 @@ static int ap_device_probe(struct device
 	int rc;
 
 	ap_dev->drv = ap_drv;
-	spin_lock_bh(&ap_device_lock);
-	list_add(&ap_dev->list, &ap_device_list);
-	spin_unlock_bh(&ap_device_lock);
 	rc = ap_drv->probe ? ap_drv->probe(ap_dev) : -ENODEV;
+	if (!rc) {
+		spin_lock_bh(&ap_device_lock);
+		list_add(&ap_dev->list, &ap_device_list);
+		spin_unlock_bh(&ap_device_lock);
+	}
 	return rc;
 }
 

@@ -532,11 +534,11 @@ static int ap_device_remove(struct devic
 
 	ap_flush_queue(ap_dev);
 	del_timer_sync(&ap_dev->timeout);
-	if (ap_drv->remove)
-		ap_drv->remove(ap_dev);
 	spin_lock_bh(&ap_device_lock);
 	list_del_init(&ap_dev->list);
 	spin_unlock_bh(&ap_device_lock);
+	if (ap_drv->remove)
+		ap_drv->remove(ap_dev);
 	spin_lock_bh(&ap_dev->lock);
 	atomic_sub(ap_dev->queue_count, &ap_poll_requests);
 	spin_unlock_bh(&ap_dev->lock);

Index: quilt-2.6/arch/s390/kernel/ipl.c
===================================================================
@@ -704,6 +704,7 @@ void reipl_run(struct shutdown_trigger *
 	default:
 		break;
 	}
+	disabled_wait((unsigned long) __builtin_return_address(0));
 }
 
 static void __init reipl_probe(void)

Index: quilt-2.6/arch/s390/kernel/early.c
===================================================================
@@ -88,13 +88,17 @@ static noinline __init void create_kerne
 
 	__cpcmd(defsys_cmd, NULL, 0, &response);
 
-	if (response != 0)
+	if (response != 0) {
+		kernel_nss_name[0] = '\0';
 		return;
+	}
 
 	__cpcmd(savesys_cmd, NULL, 0, &response);
 
-	if (response != strlen(savesys_cmd))
+	if (response != strlen(savesys_cmd)) {
+		kernel_nss_name[0] = '\0';
 		return;
+	}
 
 	ipl_flags = IPL_NSS_VALID;
 }