Merging upstream version 6.9.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 105 insertions, 73 deletions

diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 0b0324fe4a..dcb3c32f02 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -159,7 +159,7 @@ static void raw3215_mk_read_req(struct raw3215_info *raw)
 	ccw->cmd_code = 0x0A; /* read inquiry */
 	ccw->flags = 0x20;    /* ignore incorrect length */
 	ccw->count = 160;
-	ccw->cda = (__u32)__pa(raw->inbuf);
+	ccw->cda = virt_to_dma32(raw->inbuf);
 }
 
 /*
@@ -218,7 +218,7 @@ static void raw3215_mk_write_req(struct raw3215_info *raw)
 			ccw[-1].flags |= 0x40; /* use command chaining */
 		ccw->cmd_code = 0x01; /* write, auto carrier return */
 		ccw->flags = 0x20;    /* ignore incorrect length ind.  */
-		ccw->cda = (__u32)__pa(raw->buffer + ix);
+		ccw->cda = virt_to_dma32(raw->buffer + ix);
 		count = len;
 		if (ix + count > RAW3215_BUFFER_SIZE)
 			count = RAW3215_BUFFER_SIZE - ix;
diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index 4f26b0a556..4d824f86bb 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -126,7 +126,7 @@ static int fs3270_activate(struct raw3270_view *view)
 	raw3270_request_set_cmd(fp->init, TC_EWRITEA);
 	raw3270_request_set_idal(fp->init, fp->rdbuf);
 	fp->init->rescnt = 0;
-	cp = fp->rdbuf->data[0];
+	cp = dma64_to_virt(fp->rdbuf->data[0]);
 	if (fp->rdbuf_size == 0) {
 		/* No saved buffer. Just clear the screen. */
 		fp->init->ccw.count = 1;
@@ -164,7 +164,7 @@ static void fs3270_save_callback(struct raw3270_request *rq, void *data)
 	fp = (struct fs3270 *)rq->view;
 
 	/* Correct idal buffer element 0 address. */
-	fp->rdbuf->data[0] -= 5;
+	fp->rdbuf->data[0] = dma64_add(fp->rdbuf->data[0], -5);
 	fp->rdbuf->size += 5;
 
 	/*
@@ -202,7 +202,7 @@ static void fs3270_deactivate(struct raw3270_view *view)
 	 * room for the TW_KR/TO_SBA/<address>/<address>/TO_IC sequence
 	 * in the activation command.
 	 */
-	fp->rdbuf->data[0] += 5;
+	fp->rdbuf->data[0] = dma64_add(fp->rdbuf->data[0], 5);
 	fp->rdbuf->size -= 5;
 	raw3270_request_set_idal(fp->init, fp->rdbuf);
 	fp->init->rescnt = 0;
@@ -521,13 +521,13 @@ static const struct file_operations fs3270_fops = {
 static void fs3270_create_cb(int minor)
 {
 	__register_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub", &fs3270_fops);
-	device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, minor),
+	device_create(&class3270, NULL, MKDEV(IBM_FS3270_MAJOR, minor),
 		      NULL, "3270/tub%d", minor);
 }
 
 static void fs3270_destroy_cb(int minor)
 {
-	device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, minor));
+	device_destroy(&class3270, MKDEV(IBM_FS3270_MAJOR, minor));
 	__unregister_chrdev(IBM_FS3270_MAJOR, minor, 1, "tub");
 }
 
@@ -546,7 +546,7 @@ static int __init fs3270_init(void)
 	rc = __register_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270", &fs3270_fops);
 	if (rc)
 		return rc;
-	device_create(class3270, NULL, MKDEV(IBM_FS3270_MAJOR, 0),
+	device_create(&class3270, NULL, MKDEV(IBM_FS3270_MAJOR, 0),
 		      NULL, "3270/tub");
 	raw3270_register_notifier(&fs3270_notifier);
 	return 0;
@@ -555,7 +555,7 @@ static int __init fs3270_init(void)
 static void __exit fs3270_exit(void)
 {
 	raw3270_unregister_notifier(&fs3270_notifier);
-	device_destroy(class3270, MKDEV(IBM_FS3270_MAJOR, 0));
+	device_destroy(&class3270, MKDEV(IBM_FS3270_MAJOR, 0));
 	__unregister_chrdev(IBM_FS3270_MAJOR, 0, 1, "fs3270");
 }
 
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index 7115c0f856..c57694be9b 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -29,7 +29,9 @@
 #include <linux/device.h>
 #include <linux/mutex.h>
 
-struct class *class3270;
+const struct class class3270 = {
+	.name = "3270",
+};
 EXPORT_SYMBOL(class3270);
 
 /* The main 3270 data structure. */
@@ -160,7 +162,8 @@ struct raw3270_request *raw3270_request_alloc(size_t size)
 	/*
 	 * Setup ccw.
 	 */
-	rq->ccw.cda = __pa(rq->buffer);
+	if (rq->buffer)
+		rq->ccw.cda = virt_to_dma32(rq->buffer);
 	rq->ccw.flags = CCW_FLAG_SLI;
 
 	return rq;
@@ -186,7 +189,8 @@ int raw3270_request_reset(struct raw3270_request *rq)
 		return -EBUSY;
 	rq->ccw.cmd_code = 0;
 	rq->ccw.count = 0;
-	rq->ccw.cda = __pa(rq->buffer);
+	if (rq->buffer)
+		rq->ccw.cda = virt_to_dma32(rq->buffer);
 	rq->ccw.flags = CCW_FLAG_SLI;
 	rq->rescnt = 0;
 	rq->rc = 0;
@@ -221,7 +225,7 @@ EXPORT_SYMBOL(raw3270_request_add_data);
  */
 void raw3270_request_set_data(struct raw3270_request *rq, void *data, size_t size)
 {
-	rq->ccw.cda = __pa(data);
+	rq->ccw.cda = virt_to_dma32(data);
 	rq->ccw.count = size;
 }
 EXPORT_SYMBOL(raw3270_request_set_data);
@@ -231,7 +235,7 @@ EXPORT_SYMBOL(raw3270_request_set_data);
  */
 void raw3270_request_set_idal(struct raw3270_request *rq, struct idal_buffer *ib)
 {
-	rq->ccw.cda = __pa(ib->data);
+	rq->ccw.cda = virt_to_dma32(ib->data);
 	rq->ccw.count = ib->size;
 	rq->ccw.flags |= CCW_FLAG_IDA;
 }
@@ -577,7 +581,7 @@ static void raw3270_read_modified(struct raw3270 *rp)
 	rp->init_readmod.ccw.cmd_code = TC_READMOD;
 	rp->init_readmod.ccw.flags = CCW_FLAG_SLI;
 	rp->init_readmod.ccw.count = sizeof(rp->init_data);
-	rp->init_readmod.ccw.cda = (__u32)__pa(rp->init_data);
+	rp->init_readmod.ccw.cda = virt_to_dma32(rp->init_data);
 	rp->init_readmod.callback = raw3270_read_modified_cb;
 	rp->init_readmod.callback_data = rp->init_data;
 	rp->state = RAW3270_STATE_READMOD;
@@ -597,7 +601,7 @@ static void raw3270_writesf_readpart(struct raw3270 *rp)
 	rp->init_readpart.ccw.cmd_code = TC_WRITESF;
 	rp->init_readpart.ccw.flags = CCW_FLAG_SLI;
 	rp->init_readpart.ccw.count = sizeof(wbuf);
-	rp->init_readpart.ccw.cda = (__u32)__pa(&rp->init_data);
+	rp->init_readpart.ccw.cda = virt_to_dma32(&rp->init_data);
 	rp->state = RAW3270_STATE_W4ATTN;
 	raw3270_start_irq(&rp->init_view, &rp->init_readpart);
 }
@@ -635,7 +639,7 @@ static int __raw3270_reset_device(struct raw3270 *rp)
 	rp->init_reset.ccw.cmd_code = TC_EWRITEA;
 	rp->init_reset.ccw.flags = CCW_FLAG_SLI;
 	rp->init_reset.ccw.count = 1;
-	rp->init_reset.ccw.cda = (__u32)__pa(rp->init_data);
+	rp->init_reset.ccw.cda = virt_to_dma32(rp->init_data);
 	rp->init_reset.callback = raw3270_reset_device_cb;
 	rc = __raw3270_start(rp, &rp->init_view, &rp->init_reset);
 	if (rc == 0 && rp->state == RAW3270_STATE_INIT)
@@ -1316,23 +1320,25 @@ static int raw3270_init(void)
 		return 0;
 	raw3270_registered = 1;
 	rc = ccw_driver_register(&raw3270_ccw_driver);
-	if (rc == 0) {
-		/* Create attributes for early (= console) device. */
-		mutex_lock(&raw3270_mutex);
-		class3270 = class_create("3270");
-		list_for_each_entry(rp, &raw3270_devices, list) {
-			get_device(&rp->cdev->dev);
-			raw3270_create_attributes(rp);
-		}
-		mutex_unlock(&raw3270_mutex);
+	if (rc)
+		return rc;
+	rc = class_register(&class3270);
+	if (rc)
+		return rc;
+	/* Create attributes for early (= console) device. */
+	mutex_lock(&raw3270_mutex);
+	list_for_each_entry(rp, &raw3270_devices, list) {
+		get_device(&rp->cdev->dev);
+		raw3270_create_attributes(rp);
 	}
-	return rc;
+	mutex_unlock(&raw3270_mutex);
+	return 0;
 }
 
 static void raw3270_exit(void)
 {
 	ccw_driver_unregister(&raw3270_ccw_driver);
-	class_destroy(class3270);
+	class_unregister(&class3270);
 }
 
 MODULE_LICENSE("GPL");
diff --git a/drivers/s390/char/raw3270.h b/drivers/s390/char/raw3270.h
index b1beecc7a0..5040c7e0e0 100644
--- a/drivers/s390/char/raw3270.h
+++ b/drivers/s390/char/raw3270.h
@@ -14,7 +14,7 @@
 
 struct raw3270;
 struct raw3270_view;
-extern struct class *class3270;
+extern const struct class class3270;
 
 /* 3270 CCW request */
 struct raw3270_request {
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index 11c428f4c7..7815e9bea6 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -18,6 +18,7 @@
 #include <linux/mm.h>
 #include <linux/mmzone.h>
 #include <linux/memory.h>
+#include <linux/memory_hotplug.h>
 #include <linux/module.h>
 #include <asm/ctlreg.h>
 #include <asm/chpid.h>
@@ -26,6 +27,7 @@
 #include <asm/sclp.h>
 #include <asm/numa.h>
 #include <asm/facility.h>
+#include <asm/page-states.h>
 
 #include "sclp.h"
 
@@ -340,16 +342,38 @@ static int sclp_mem_notifier(struct notifier_block *nb,
 		if (contains_standby_increment(start, start + size))
 			rc = -EPERM;
 		break;
-	case MEM_ONLINE:
-	case MEM_CANCEL_OFFLINE:
-		break;
-	case MEM_GOING_ONLINE:
+	case MEM_PREPARE_ONLINE:
+		/*
+		 * Access the altmap_start_pfn and altmap_nr_pages fields
+		 * within the struct memory_notify specifically when dealing
+		 * with only MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers.
+		 *
+		 * When altmap is in use, take the specified memory range
+		 * online, which includes the altmap.
+		 */
+		if (arg->altmap_nr_pages) {
+			start = PFN_PHYS(arg->altmap_start_pfn);
+			size += PFN_PHYS(arg->altmap_nr_pages);
+		}
 		rc = sclp_mem_change_state(start, size, 1);
+		if (rc || !arg->altmap_nr_pages)
+			break;
+		/*
+		 * Set CMMA state to nodat here, since the struct page memory
+		 * at the beginning of the memory block will not go through the
+		 * buddy allocator later.
+		 */
+		__arch_set_page_nodat((void *)__va(start), arg->altmap_nr_pages);
 		break;
-	case MEM_CANCEL_ONLINE:
-		sclp_mem_change_state(start, size, 0);
-		break;
-	case MEM_OFFLINE:
+	case MEM_FINISH_OFFLINE:
+		/*
+		 * When altmap is in use, take the specified memory range
+		 * offline, which includes the altmap.
+		 */
+		if (arg->altmap_nr_pages) {
+			start = PFN_PHYS(arg->altmap_start_pfn);
+			size += PFN_PHYS(arg->altmap_nr_pages);
+		}
 		sclp_mem_change_state(start, size, 0);
 		break;
 	default:
@@ -400,7 +424,9 @@ static void __init add_memory_merged(u16 rn)
 	if (!size)
 		goto skip_add;
 	for (addr = start; addr < start + size; addr += block_size)
-		add_memory(0, addr, block_size, MHP_NONE);
+		add_memory(0, addr, block_size,
+			   MACHINE_HAS_EDAT1 ?
+			   MHP_MEMMAP_ON_MEMORY | MHP_OFFLINE_INACCESSIBLE : MHP_NONE);
 skip_add:
 	first_rn = rn;
 	num = 1;
diff --git a/drivers/s390/char/tape.h b/drivers/s390/char/tape.h
index 4e5d5efa97..0aba30efb4 100644
--- a/drivers/s390/char/tape.h
+++ b/drivers/s390/char/tape.h
@@ -305,7 +305,9 @@ tape_ccw_cc(struct ccw1 *ccw, __u8 cmd_code, __u16 memsize, void *cda)
 	ccw->cmd_code = cmd_code;
 	ccw->flags = CCW_FLAG_CC;
 	ccw->count = memsize;
-	ccw->cda = (__u32)(addr_t) cda;
+	ccw->cda = 0;
+	if (cda)
+		ccw->cda = virt_to_dma32(cda);
 	return ccw + 1;
 }
 
@@ -315,7 +317,9 @@ tape_ccw_end(struct ccw1 *ccw, __u8 cmd_code, __u16 memsize, void *cda)
 	ccw->cmd_code = cmd_code;
 	ccw->flags = 0;
 	ccw->count = memsize;
-	ccw->cda = (__u32)(addr_t) cda;
+	ccw->cda = 0;
+	if (cda)
+		ccw->cda = virt_to_dma32(cda);
 	return ccw + 1;
 }
 
@@ -325,7 +329,7 @@ tape_ccw_cmd(struct ccw1 *ccw, __u8 cmd_code)
 	ccw->cmd_code = cmd_code;
 	ccw->flags = 0;
 	ccw->count = 0;
-	ccw->cda = (__u32)(addr_t) &ccw->cmd_code;
+	ccw->cda = virt_to_dma32(&ccw->cmd_code);
 	return ccw + 1;
 }
 
@@ -336,7 +340,7 @@ tape_ccw_repeat(struct ccw1 *ccw, __u8 cmd_code, int count)
 		ccw->cmd_code = cmd_code;
 		ccw->flags = CCW_FLAG_CC;
 		ccw->count = 0;
-		ccw->cda = (__u32)(addr_t) &ccw->cmd_code;
+		ccw->cda = virt_to_dma32(&ccw->cmd_code);
 		ccw++;
 	}
 	return ccw;
diff --git a/drivers/s390/char/tape_class.c b/drivers/s390/char/tape_class.c
index 277a0f903d..eae362bbfb 100644
--- a/drivers/s390/char/tape_class.c
+++ b/drivers/s390/char/tape_class.c
@@ -22,7 +22,9 @@ MODULE_DESCRIPTION(
 );
 MODULE_LICENSE("GPL");
 
-static struct class *tape_class;
+static const struct class tape_class = {
+	.name = "tape390",
+};
 
 /*
  * Register a tape device and return a pointer to the cdev structure.
@@ -74,7 +76,7 @@ struct tape_class_device *register_tape_dev(
 	if (rc)
 		goto fail_with_cdev;
 
-	tcd->class_device = device_create(tape_class, device,
+	tcd->class_device = device_create(&tape_class, device,
 					  tcd->char_device->dev, NULL,
 					  "%s", tcd->device_name);
 	rc = PTR_ERR_OR_ZERO(tcd->class_device);
@@ -91,7 +93,7 @@ struct tape_class_device *register_tape_dev(
 	return tcd;
 
 fail_with_class_device:
-	device_destroy(tape_class, tcd->char_device->dev);
+	device_destroy(&tape_class, tcd->char_device->dev);
 
 fail_with_cdev:
 	cdev_del(tcd->char_device);
@@ -107,7 +109,7 @@ void unregister_tape_dev(struct device *device, struct tape_class_device *tcd)
 {
 	if (tcd != NULL && !IS_ERR(tcd)) {
 		sysfs_remove_link(&device->kobj, tcd->mode_name);
-		device_destroy(tape_class, tcd->char_device->dev);
+		device_destroy(&tape_class, tcd->char_device->dev);
 		cdev_del(tcd->char_device);
 		kfree(tcd);
 	}
@@ -117,15 +119,12 @@ EXPORT_SYMBOL(unregister_tape_dev);
 
 static int __init tape_init(void)
 {
-	tape_class = class_create("tape390");
-
-	return 0;
+	return class_register(&tape_class);
 }
 
 static void __exit tape_exit(void)
 {
-	class_destroy(tape_class);
-	tape_class = NULL;
+	class_unregister(&tape_class);
 }
 
 postcore_initcall(tape_init);
diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c
index 6946ba9a9d..d7e408c8d0 100644
--- a/drivers/s390/char/vmlogrdr.c
+++ b/drivers/s390/char/vmlogrdr.c
@@ -679,7 +679,9 @@ static const struct attribute_group *vmlogrdr_attr_groups[] = {
 	NULL,
 };
 
-static struct class *vmlogrdr_class;
+static const struct class vmlogrdr_class = {
+	.name = "vmlogrdr_class",
+};
 static struct device_driver vmlogrdr_driver = {
 	.name = "vmlogrdr",
 	.bus  = &iucv_bus,
@@ -699,12 +701,9 @@ static int vmlogrdr_register_driver(void)
 	if (ret)
 		goto out_iucv;
 
-	vmlogrdr_class = class_create("vmlogrdr");
-	if (IS_ERR(vmlogrdr_class)) {
-		ret = PTR_ERR(vmlogrdr_class);
-		vmlogrdr_class = NULL;
+	ret = class_register(&vmlogrdr_class);
+	if (ret)
 		goto out_driver;
-	}
 	return 0;
 
 out_driver:
@@ -718,8 +717,7 @@ out:
 
 static void vmlogrdr_unregister_driver(void)
 {
-	class_destroy(vmlogrdr_class);
-	vmlogrdr_class = NULL;
+	class_unregister(&vmlogrdr_class);
 	driver_unregister(&vmlogrdr_driver);
 	iucv_unregister(&vmlogrdr_iucv_handler, 1);
 }
@@ -754,7 +752,7 @@ static int vmlogrdr_register_device(struct vmlogrdr_priv_t *priv)
 		return ret;
 	}
 
-	priv->class_device = device_create(vmlogrdr_class, dev,
+	priv->class_device = device_create(&vmlogrdr_class, dev,
 					   MKDEV(vmlogrdr_major,
 						 priv->minor_num),
 					   priv, "%s", dev_name(dev));
@@ -771,7 +769,7 @@ static int vmlogrdr_register_device(struct vmlogrdr_priv_t *priv)
 
 static int vmlogrdr_unregister_device(struct vmlogrdr_priv_t *priv)
 {
-	device_destroy(vmlogrdr_class, MKDEV(vmlogrdr_major, priv->minor_num));
+	device_destroy(&vmlogrdr_class, MKDEV(vmlogrdr_major, priv->minor_num));
 	if (priv->device != NULL) {
 		device_unregister(priv->device);
 		priv->device=NULL;
diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index 82efdd20ad..fe94dec427 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -48,7 +48,9 @@ MODULE_DESCRIPTION("s390 z/VM virtual unit record device driver");
 MODULE_LICENSE("GPL");
 
 static dev_t ur_first_dev_maj_min;
-static struct class *vmur_class;
+static const struct class vmur_class = {
+	.name = "vmur",
+};
 static struct debug_info *vmur_dbf;
 
 /* We put the device's record length (for writes) in the driver_info field */
@@ -195,7 +197,7 @@ static void free_chan_prog(struct ccw1 *cpa)
 	struct ccw1 *ptr = cpa;
 
 	while (ptr->cda) {
-		kfree((void *)(addr_t) ptr->cda);
+		kfree(dma32_to_virt(ptr->cda));
 		ptr++;
 	}
 	kfree(cpa);
@@ -237,7 +239,7 @@ static struct ccw1 *alloc_chan_prog(const char __user *ubuf, int rec_count,
 			free_chan_prog(cpa);
 			return ERR_PTR(-ENOMEM);
 		}
-		cpa[i].cda = (u32)(addr_t) kbuf;
+		cpa[i].cda = virt_to_dma32(kbuf);
 		if (copy_from_user(kbuf, ubuf, reclen)) {
 			free_chan_prog(cpa);
 			return ERR_PTR(-EFAULT);
@@ -912,7 +914,7 @@ static int ur_set_online(struct ccw_device *cdev)
 		goto fail_free_cdev;
 	}
 
-	urd->device = device_create(vmur_class, &cdev->dev,
+	urd->device = device_create(&vmur_class, &cdev->dev,
 				    urd->char_device->dev, NULL, "%s", node_id);
 	if (IS_ERR(urd->device)) {
 		rc = PTR_ERR(urd->device);
@@ -958,7 +960,7 @@ static int ur_set_offline_force(struct ccw_device *cdev, int force)
 		/* Work not run yet - need to release reference here */
 		urdev_put(urd);
 	}
-	device_destroy(vmur_class, urd->char_device->dev);
+	device_destroy(&vmur_class, urd->char_device->dev);
 	cdev_del(urd->char_device);
 	urd->char_device = NULL;
 	rc = 0;
@@ -1022,11 +1024,9 @@ static int __init ur_init(void)
 
 	debug_set_level(vmur_dbf, 6);
 
-	vmur_class = class_create("vmur");
-	if (IS_ERR(vmur_class)) {
-		rc = PTR_ERR(vmur_class);
+	rc = class_register(&vmur_class);
+	if (rc)
 		goto fail_free_dbf;
-	}
 
 	rc = ccw_driver_register(&ur_driver);
 	if (rc)
@@ -1046,7 +1046,7 @@ static int __init ur_init(void)
 fail_unregister_driver:
 	ccw_driver_unregister(&ur_driver);
 fail_class_destroy:
-	class_destroy(vmur_class);
+	class_unregister(&vmur_class);
 fail_free_dbf:
 	debug_unregister(vmur_dbf);
 	return rc;
@@ -1056,7 +1056,7 @@ static void __exit ur_exit(void)
 {
 	unregister_chrdev_region(ur_first_dev_maj_min, NUM_MINORS);
 	ccw_driver_unregister(&ur_driver);
-	class_destroy(vmur_class);
+	class_unregister(&vmur_class);
 	debug_unregister(vmur_dbf);
 	pr_info("%s unloaded.\n", ur_banner);
 }
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index bc3be0330f..0969fa01df 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -29,7 +29,6 @@
 #include <asm/irqflags.h>
 #include <asm/checksum.h>
 #include <asm/os_info.h>
-#include <asm/switch_to.h>
 #include <asm/maccess.h>
 #include "sclp.h"