24 files changed, 381 insertions, 220 deletions

diff --git a/drivers/s390/char/Makefile b/drivers/s390/char/Makefile
index 41e28b23b26a..0c443e26835d 100644
--- a/drivers/s390/char/Makefile
+++ b/drivers/s390/char/Makefile
@@ -2,9 +2,23 @@
 # S/390 character devices
 #
 
+ifdef CONFIG_FUNCTION_TRACER
+# Do not trace early setup code
+CFLAGS_REMOVE_sclp_early_core.o	= $(CC_FLAGS_FTRACE)
+endif
+
+GCOV_PROFILE_sclp_early_core.o		:= n
+KCOV_INSTRUMENT_sclp_early_core.o	:= n
+UBSAN_SANITIZE_sclp_early_core.o	:= n
+
+ifneq ($(CC_FLAGS_MARCH),-march=z900)
+CFLAGS_REMOVE_sclp_early_core.o	+= $(CC_FLAGS_MARCH)
+CFLAGS_sclp_early_core.o		+= -march=z900
+endif
+
 obj-y += ctrlchar.o keyboard.o defkeymap.o sclp.o sclp_rw.o sclp_quiesce.o \
 	 sclp_cmd.o sclp_config.o sclp_cpi_sys.o sclp_ocf.o sclp_ctl.o \
-	 sclp_early.o
+	 sclp_early.o sclp_early_core.o
 
 obj-$(CONFIG_TN3270) += raw3270.o
 obj-$(CONFIG_TN3270_CONSOLE) += con3270.o
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 931d10e86837..9ec4ae056158 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -9,7 +9,6 @@
  *	      Dan Morrison, IBM Corporation <dmorriso@cse.buffalo.edu>
  */
 
-#include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kdev_t.h>
 #include <linux/tty.h>
@@ -26,7 +25,7 @@
 #include <asm/cio.h>
 #include <asm/io.h>
 #include <asm/ebcdic.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/delay.h>
 #include <asm/cpcmd.h>
 #include <asm/setup.h>
@@ -1215,13 +1214,4 @@ static int __init tty3215_init(void)
 	tty3215_driver = driver;
 	return 0;
 }
-
-static void __exit tty3215_exit(void)
-{
-	tty_unregister_driver(tty3215_driver);
-	put_tty_driver(tty3215_driver);
-	ccw_driver_unregister(&raw3215_ccw_driver);
-}
-
-module_init(tty3215_init);
-module_exit(tty3215_exit);
+device_initcall(tty3215_init);
diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index 285b4006f44b..8522cfce5b4e 100644
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -31,7 +31,7 @@
 
 static struct raw3270_fn con3270_fn;
 
-static bool auto_update = 1;
+static bool auto_update = true;
 module_param(auto_update, bool, 0);
 
 /*
diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index 85eca1cef063..c4518168fd02 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/compat.h>
+#include <linux/sched/signal.h>
 #include <linux/module.h>
 #include <linux/list.h>
 #include <linux/slab.h>
diff --git a/drivers/s390/char/keyboard.c b/drivers/s390/char/keyboard.c
index 7b9c50aa4cc9..ba0e4f93503d 100644
--- a/drivers/s390/char/keyboard.c
+++ b/drivers/s390/char/keyboard.c
@@ -7,14 +7,14 @@
  */
 
 #include <linux/module.h>
-#include <linux/sched.h>
+#include <linux/sched/signal.h>
 #include <linux/slab.h>
 #include <linux/sysrq.h>
 
 #include <linux/consolemap.h>
 #include <linux/kbd_kern.h>
 #include <linux/kbd_diacr.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "keyboard.h"
 
diff --git a/drivers/s390/char/monreader.c b/drivers/s390/char/monreader.c
index ebdeaa53182d..027ac6ae5eea 100644
--- a/drivers/s390/char/monreader.c
+++ b/drivers/s390/char/monreader.c
@@ -23,7 +23,7 @@
 #include <linux/device.h>
 #include <linux/slab.h>
 #include <net/iucv/iucv.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/ebcdic.h>
 #include <asm/extmem.h>
 
diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c
index 9b5d1138b2e2..571a7e352755 100644
--- a/drivers/s390/char/monwriter.c
+++ b/drivers/s390/char/monwriter.c
@@ -21,7 +21,7 @@
 #include <linux/mutex.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/ebcdic.h>
 #include <asm/io.h>
 #include <asm/appldata.h>
diff --git a/drivers/s390/char/raw3270.c b/drivers/s390/char/raw3270.c
index a2da898ce90f..710f2292911d 100644
--- a/drivers/s390/char/raw3270.c
+++ b/drivers/s390/char/raw3270.c
@@ -82,7 +82,7 @@ static LIST_HEAD(raw3270_devices);
 static int raw3270_registered;
 
 /* Module parameters */
-static bool tubxcorrect = 0;
+static bool tubxcorrect;
 module_param(tubxcorrect, bool, 0);
 
 /*
diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index 272898225dbb..9c471ea1b99c 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -94,13 +94,6 @@ static struct timer_list sclp_request_timer;
 /* Timer for queued requests. */
 static struct timer_list sclp_queue_timer;
 
-/* Internal state: is the driver initialized? */
-static volatile enum sclp_init_state_t {
-	sclp_init_state_uninitialized,
-	sclp_init_state_initializing,
-	sclp_init_state_initialized
-} sclp_init_state = sclp_init_state_uninitialized;
-
 /* Internal state: is a request active at the sclp? */
 static volatile enum sclp_running_state_t {
 	sclp_running_state_idle,
@@ -147,31 +140,6 @@ static void __sclp_make_read_req(void);
 static int sclp_init_mask(int calculate);
 static int sclp_init(void);
 
-/* Perform service call. Return 0 on success, non-zero otherwise. */
-int
-sclp_service_call(sclp_cmdw_t command, void *sccb)
-{
-	int cc = 4; /* Initialize for program check handling */
-
-	asm volatile(
-		"0:	.insn	rre,0xb2200000,%1,%2\n"  /* servc %1,%2 */
-		"1:	ipm	%0\n"
-		"	srl	%0,28\n"
-		"2:\n"
-		EX_TABLE(0b, 2b)
-		EX_TABLE(1b, 2b)
-		: "+&d" (cc) : "d" (command), "a" (__pa(sccb))
-		: "cc", "memory");
-	if (cc == 4)
-		return -EINVAL;
-	if (cc == 3)
-		return -EIO;
-	if (cc == 2)
-		return -EBUSY;
-	return 0;
-}
-
-
 static void
 __sclp_queue_read_req(void)
 {
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index 7a10c56334bb..53b5d1b9761a 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -59,6 +59,7 @@
 
 typedef unsigned int sclp_cmdw_t;
 
+#define SCLP_CMDW_READ_CPU_INFO		0x00010001
 #define SCLP_CMDW_READ_EVENT_DATA	0x00770005
 #define SCLP_CMDW_WRITE_EVENT_DATA	0x00760005
 #define SCLP_CMDW_WRITE_EVENT_MASK	0x00780005
@@ -102,6 +103,28 @@ struct init_sccb {
 	sccb_mask_t sclp_send_mask;
 } __attribute__((packed));
 
+struct read_cpu_info_sccb {
+	struct	sccb_header header;
+	u16	nr_configured;
+	u16	offset_configured;
+	u16	nr_standby;
+	u16	offset_standby;
+	u8	reserved[4096 - 16];
+} __attribute__((packed, aligned(PAGE_SIZE)));
+
+static inline void sclp_fill_core_info(struct sclp_core_info *info,
+				       struct read_cpu_info_sccb *sccb)
+{
+	char *page = (char *) sccb;
+
+	memset(info, 0, sizeof(*info));
+	info->configured = sccb->nr_configured;
+	info->standby = sccb->nr_standby;
+	info->combined = sccb->nr_configured + sccb->nr_standby;
+	memcpy(&info->core, page + sccb->offset_configured,
+	       info->combined * sizeof(struct sclp_core_entry));
+}
+
 #define SCLP_HAS_CHP_INFO	(sclp.facilities & 0x8000000000000000ULL)
 #define SCLP_HAS_CHP_RECONFIG	(sclp.facilities & 0x2000000000000000ULL)
 #define SCLP_HAS_CPU_INFO	(sclp.facilities & 0x0800000000000000ULL)
@@ -181,19 +204,57 @@ void sclp_unregister(struct sclp_register *reg);
 int sclp_remove_processed(struct sccb_header *sccb);
 int sclp_deactivate(void);
 int sclp_reactivate(void);
-int sclp_service_call(sclp_cmdw_t command, void *sccb);
 int sclp_sync_request(sclp_cmdw_t command, void *sccb);
 int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
 
 int sclp_sdias_init(void);
 void sclp_sdias_exit(void);
 
+enum {
+	sclp_init_state_uninitialized,
+	sclp_init_state_initializing,
+	sclp_init_state_initialized
+};
+
+extern int sclp_init_state;
 extern int sclp_console_pages;
 extern int sclp_console_drop;
 extern unsigned long sclp_console_full;
 
+extern char sclp_early_sccb[PAGE_SIZE];
+
+void sclp_early_wait_irq(void);
+int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
+unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
+int sclp_early_set_event_mask(struct init_sccb *sccb,
+			      unsigned long receive_mask,
+			      unsigned long send_mask);
+
 /* useful inlines */
 
+/* Perform service call. Return 0 on success, non-zero otherwise. */
+static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
+{
+	int cc = 4; /* Initialize for program check handling */
+
+	asm volatile(
+		"0:	.insn	rre,0xb2200000,%1,%2\n"	 /* servc %1,%2 */
+		"1:	ipm	%0\n"
+		"	srl	%0,28\n"
+		"2:\n"
+		EX_TABLE(0b, 2b)
+		EX_TABLE(1b, 2b)
+		: "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
+		: "cc", "memory");
+	if (cc == 4)
+		return -EINVAL;
+	if (cc == 3)
+		return -EIO;
+	if (cc == 2)
+		return -EBUSY;
+	return 0;
+}
+
 /* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
 /* translate single character from ASCII to EBCDIC */
 static inline unsigned char
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c
index e3fc7539116b..b9c5522b8a68 100644
--- a/drivers/s390/char/sclp_cmd.c
+++ b/drivers/s390/char/sclp_cmd.c
@@ -80,33 +80,10 @@ out:
  * CPU configuration related functions.
  */
 
-#define SCLP_CMDW_READ_CPU_INFO		0x00010001
 #define SCLP_CMDW_CONFIGURE_CPU		0x00110001
 #define SCLP_CMDW_DECONFIGURE_CPU	0x00100001
 
-struct read_cpu_info_sccb {
-	struct	sccb_header header;
-	u16	nr_configured;
-	u16	offset_configured;
-	u16	nr_standby;
-	u16	offset_standby;
-	u8	reserved[4096 - 16];
-} __attribute__((packed, aligned(PAGE_SIZE)));
-
-static void sclp_fill_core_info(struct sclp_core_info *info,
-				struct read_cpu_info_sccb *sccb)
-{
-	char *page = (char *) sccb;
-
-	memset(info, 0, sizeof(*info));
-	info->configured = sccb->nr_configured;
-	info->standby = sccb->nr_standby;
-	info->combined = sccb->nr_configured + sccb->nr_standby;
-	memcpy(&info->core, page + sccb->offset_configured,
-	       info->combined * sizeof(struct sclp_core_entry));
-}
-
-int sclp_get_core_info(struct sclp_core_info *info)
+int _sclp_get_core_info(struct sclp_core_info *info)
 {
 	int rc;
 	struct read_cpu_info_sccb *sccb;
diff --git a/drivers/s390/char/sclp_ctl.c b/drivers/s390/char/sclp_ctl.c
index 554eaa1e347d..78a7e4f94721 100644
--- a/drivers/s390/char/sclp_ctl.c
+++ b/drivers/s390/char/sclp_ctl.c
@@ -10,7 +10,7 @@
 #include <linux/uaccess.h>
 #include <linux/miscdevice.h>
 #include <linux/gfp.h>
-#include <linux/module.h>
+#include <linux/init.h>
 #include <linux/ioctl.h>
 #include <linux/fs.h>
 #include <asm/compat.h>
@@ -126,4 +126,4 @@ static struct miscdevice sclp_ctl_device = {
 	.name = "sclp",
 	.fops = &sclp_ctl_fops,
 };
-module_misc_device(sclp_ctl_device);
+builtin_misc_device(sclp_ctl_device);
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index c71df0c7dedc..519ec1787117 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -55,46 +55,23 @@ struct read_info_sccb {
 	u8	_pad_128[4096 - 128];	/* 128-4095 */
 } __packed __aligned(PAGE_SIZE);
 
-static char sccb_early[PAGE_SIZE] __aligned(PAGE_SIZE) __initdata;
 static struct sclp_ipl_info sclp_ipl_info;
 
 struct sclp_info sclp;
 EXPORT_SYMBOL(sclp);
 
-static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb)
+static int __init sclp_early_read_info(struct read_info_sccb *sccb)
 {
-	int rc;
-
-	__ctl_set_bit(0, 9);
-	rc = sclp_service_call(cmd, sccb);
-	if (rc)
-		goto out;
-	__load_psw_mask(PSW_DEFAULT_KEY | PSW_MASK_BASE | PSW_MASK_EA |
-			PSW_MASK_BA | PSW_MASK_EXT | PSW_MASK_WAIT);
-	local_irq_disable();
-out:
-	/* Contents of the sccb might have changed. */
-	barrier();
-	__ctl_clear_bit(0, 9);
-	return rc;
-}
-
-static int __init sclp_read_info_early(struct read_info_sccb *sccb)
-{
-	int rc, i;
+	int i;
 	sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED,
 				  SCLP_CMDW_READ_SCP_INFO};
 
 	for (i = 0; i < ARRAY_SIZE(commands); i++) {
-		do {
-			memset(sccb, 0, sizeof(*sccb));
-			sccb->header.length = sizeof(*sccb);
-			sccb->header.function_code = 0x80;
-			sccb->header.control_mask[2] = 0x80;
-			rc = sclp_cmd_sync_early(commands[i], sccb);
-		} while (rc == -EBUSY);
-
-		if (rc)
+		memset(sccb, 0, sizeof(*sccb));
+		sccb->header.length = sizeof(*sccb);
+		sccb->header.function_code = 0x80;
+		sccb->header.control_mask[2] = 0x80;
+		if (sclp_early_cmd(commands[i], sccb))
 			break;
 		if (sccb->header.response_code == 0x10)
 			return 0;
@@ -104,12 +81,12 @@ static int __init sclp_read_info_early(struct read_info_sccb *sccb)
 	return -EIO;
 }
 
-static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
+static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
 {
 	struct sclp_core_entry *cpue;
 	u16 boot_cpu_address, cpu;
 
-	if (sclp_read_info_early(sccb))
+	if (sclp_early_read_info(sccb))
 		return;
 
 	sclp.facilities = sccb->facilities;
@@ -172,34 +149,43 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
 }
 
 /*
- * This function will be called after sclp_facilities_detect(), which gets
- * called from early.c code. The sclp_facilities_detect() function retrieves
+ * This function will be called after sclp_early_facilities_detect(), which gets
+ * called from early.c code. The sclp_early_facilities_detect() function retrieves
  * and saves the IPL information.
  */
-void __init sclp_get_ipl_info(struct sclp_ipl_info *info)
+void __init sclp_early_get_ipl_info(struct sclp_ipl_info *info)
 {
 	*info = sclp_ipl_info;
 }
 
-static int __init sclp_cmd_early(sclp_cmdw_t cmd, void *sccb)
-{
-	int rc;
+static struct sclp_core_info sclp_early_core_info __initdata;
+static int sclp_early_core_info_valid __initdata;
 
-	do {
-		rc = sclp_cmd_sync_early(cmd, sccb);
-	} while (rc == -EBUSY);
+static void __init sclp_early_init_core_info(struct read_cpu_info_sccb *sccb)
+{
+	if (!SCLP_HAS_CPU_INFO)
+		return;
+	memset(sccb, 0, sizeof(*sccb));
+	sccb->header.length = sizeof(*sccb);
+	if (sclp_early_cmd(SCLP_CMDW_READ_CPU_INFO, sccb))
+		return;
+	if (sccb->header.response_code != 0x0010)
+		return;
+	sclp_fill_core_info(&sclp_early_core_info, sccb);
+	sclp_early_core_info_valid = 1;
+}
 
-	if (rc)
-		return -EIO;
-	if (((struct sccb_header *) sccb)->response_code != 0x0020)
+int __init sclp_early_get_core_info(struct sclp_core_info *info)
+{
+	if (!sclp_early_core_info_valid)
 		return -EIO;
+	*info = sclp_early_core_info;
 	return 0;
 }
 
-static void __init sccb_init_eq_size(struct sdias_sccb *sccb)
+static long __init sclp_early_hsa_size_init(struct sdias_sccb *sccb)
 {
 	memset(sccb, 0, sizeof(*sccb));
-
 	sccb->hdr.length = sizeof(*sccb);
 	sccb->evbuf.hdr.length = sizeof(struct sdias_evbuf);
 	sccb->evbuf.hdr.type = EVTYP_SDIAS;
@@ -207,76 +193,52 @@ static void __init sccb_init_eq_size(struct sdias_sccb *sccb)
 	sccb->evbuf.data_id = SDIAS_DI_FCP_DUMP;
 	sccb->evbuf.event_id = 4712;
 	sccb->evbuf.dbs = 1;
-}
-
-static int __init sclp_set_event_mask(struct init_sccb *sccb,
-				      unsigned long receive_mask,
-				      unsigned long send_mask)
-{
-	memset(sccb, 0, sizeof(*sccb));
-	sccb->header.length = sizeof(*sccb);
-	sccb->mask_length = sizeof(sccb_mask_t);
-	sccb->receive_mask = receive_mask;
-	sccb->send_mask = send_mask;
-	return sclp_cmd_early(SCLP_CMDW_WRITE_EVENT_MASK, sccb);
-}
-
-static long __init sclp_hsa_size_init(struct sdias_sccb *sccb)
-{
-	sccb_init_eq_size(sccb);
-	if (sclp_cmd_early(SCLP_CMDW_WRITE_EVENT_DATA, sccb))
+	if (sclp_early_cmd(SCLP_CMDW_WRITE_EVENT_DATA, sccb))
+		return -EIO;
+	if (sccb->hdr.response_code != 0x20)
 		return -EIO;
 	if (sccb->evbuf.blk_cnt == 0)
 		return 0;
 	return (sccb->evbuf.blk_cnt - 1) * PAGE_SIZE;
 }
 
-static long __init sclp_hsa_copy_wait(struct sccb_header *sccb)
+static long __init sclp_early_hsa_copy_wait(struct sdias_sccb *sccb)
 {
 	memset(sccb, 0, PAGE_SIZE);
-	sccb->length = PAGE_SIZE;
-	if (sclp_cmd_early(SCLP_CMDW_READ_EVENT_DATA, sccb))
+	sccb->hdr.length = PAGE_SIZE;
+	if (sclp_early_cmd(SCLP_CMDW_READ_EVENT_DATA, sccb))
+		return -EIO;
+	if ((sccb->hdr.response_code != 0x20) && (sccb->hdr.response_code != 0x220))
 		return -EIO;
-	if (((struct sdias_sccb *) sccb)->evbuf.blk_cnt == 0)
+	if (sccb->evbuf.blk_cnt == 0)
 		return 0;
-	return (((struct sdias_sccb *) sccb)->evbuf.blk_cnt - 1) * PAGE_SIZE;
+	return (sccb->evbuf.blk_cnt - 1) * PAGE_SIZE;
 }
 
-static void __init sclp_hsa_size_detect(void *sccb)
+static void __init sclp_early_hsa_size_detect(void *sccb)
 {
-	long size;
+	unsigned long flags;
+	long size = -EIO;
 
-	/* First try synchronous interface (LPAR) */
-	if (sclp_set_event_mask(sccb, 0, 0x40000010))
-		return;
-	size = sclp_hsa_size_init(sccb);
-	if (size < 0)
-		return;
-	if (size != 0)
+	raw_local_irq_save(flags);
+	if (sclp_early_set_event_mask(sccb, EVTYP_SDIAS_MASK, EVTYP_SDIAS_MASK))
 		goto out;
-	/* Then try asynchronous interface (z/VM) */
-	if (sclp_set_event_mask(sccb, 0x00000010, 0x40000010))
-		return;
-	size = sclp_hsa_size_init(sccb);
-	if (size < 0)
-		return;
-	size = sclp_hsa_copy_wait(sccb);
-	if (size < 0)
-		return;
+	size = sclp_early_hsa_size_init(sccb);
+	/* First check for synchronous response (LPAR) */
+	if (size)
+		goto out_mask;
+	if (!(S390_lowcore.ext_params & 1))
+		sclp_early_wait_irq();
+	size = sclp_early_hsa_copy_wait(sccb);
+out_mask:
+	sclp_early_set_event_mask(sccb, 0, 0);
 out:
-	sclp.hsa_size = size;
-}
-
-static unsigned int __init sclp_con_check_linemode(struct init_sccb *sccb)
-{
-	if (!(sccb->sclp_send_mask & EVTYP_OPCMD_MASK))
-		return 0;
-	if (!(sccb->sclp_receive_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)))
-		return 0;
-	return 1;
+	raw_local_irq_restore(flags);
+	if (size > 0)
+		sclp.hsa_size = size;
 }
 
-static void __init sclp_console_detect(struct init_sccb *sccb)
+static void __init sclp_early_console_detect(struct init_sccb *sccb)
 {
 	if (sccb->header.response_code != 0x20)
 		return;
@@ -284,20 +246,22 @@ static void __init sclp_console_detect(struct init_sccb *sccb)
 	if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK)
 		sclp.has_vt220 = 1;
 
-	if (sclp_con_check_linemode(sccb))
+	if (sclp_early_con_check_linemode(sccb))
 		sclp.has_linemode = 1;
 }
 
 void __init sclp_early_detect(void)
 {
-	void *sccb = &sccb_early;
+	void *sccb = &sclp_early_sccb;
 
-	sclp_facilities_detect(sccb);
-	sclp_hsa_size_detect(sccb);
+	sclp_early_facilities_detect(sccb);
+	sclp_early_init_core_info(sccb);
+	sclp_early_hsa_size_detect(sccb);
 
-	/* Turn off SCLP event notifications.  Also save remote masks in the
+	/*
+	 * Turn off SCLP event notifications.  Also save remote masks in the
 	 * sccb.  These are sufficient to detect sclp console capabilities.
 	 */
-	sclp_set_event_mask(sccb, 0, 0);
-	sclp_console_detect(sccb);
+	sclp_early_set_event_mask(sccb, 0, 0);
+	sclp_early_console_detect(sccb);
 }
diff --git a/drivers/s390/char/sclp_early_core.c b/drivers/s390/char/sclp_early_core.c
new file mode 100644
index 000000000000..5029cc87e80f
--- /dev/null
+++ b/drivers/s390/char/sclp_early_core.c
@@ -0,0 +1,208 @@
+/*
+ *    Copyright IBM Corp. 2015
+ *    Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#include <linux/kernel.h>
+#include <asm/processor.h>
+#include <asm/lowcore.h>
+#include <asm/ebcdic.h>
+#include <asm/irq.h>
+#include "sclp.h"
+#include "sclp_rw.h"
+
+char sclp_early_sccb[PAGE_SIZE] __aligned(PAGE_SIZE) __section(data);
+int sclp_init_state __section(data) = sclp_init_state_uninitialized;
+
+void sclp_early_wait_irq(void)
+{
+	unsigned long psw_mask, addr;
+	psw_t psw_ext_save, psw_wait;
+	union ctlreg0 cr0, cr0_new;
+
+	__ctl_store(cr0.val, 0, 0);
+	cr0_new.val = cr0.val & ~CR0_IRQ_SUBCLASS_MASK;
+	cr0_new.lap = 0;
+	cr0_new.sssm = 1;
+	__ctl_load(cr0_new.val, 0, 0);
+
+	psw_ext_save = S390_lowcore.external_new_psw;
+	psw_mask = __extract_psw();
+	S390_lowcore.external_new_psw.mask = psw_mask;
+	psw_wait.mask = psw_mask | PSW_MASK_EXT | PSW_MASK_WAIT;
+	S390_lowcore.ext_int_code = 0;
+
+	do {
+		asm volatile(
+			"	larl	%[addr],0f\n"
+			"	stg	%[addr],%[psw_wait_addr]\n"
+			"	stg	%[addr],%[psw_ext_addr]\n"
+			"	lpswe	%[psw_wait]\n"
+			"0:\n"
+			: [addr] "=&d" (addr),
+			  [psw_wait_addr] "=Q" (psw_wait.addr),
+			  [psw_ext_addr] "=Q" (S390_lowcore.external_new_psw.addr)
+			: [psw_wait] "Q" (psw_wait)
+			: "cc", "memory");
+	} while (S390_lowcore.ext_int_code != EXT_IRQ_SERVICE_SIG);
+
+	S390_lowcore.external_new_psw = psw_ext_save;
+	__ctl_load(cr0.val, 0, 0);
+}
+
+int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb)
+{
+	unsigned long flags;
+	int rc;
+
+	raw_local_irq_save(flags);
+	rc = sclp_service_call(cmd, sccb);
+	if (rc)
+		goto out;
+	sclp_early_wait_irq();
+out:
+	raw_local_irq_restore(flags);
+	return rc;
+}
+
+struct write_sccb {
+	struct sccb_header header;
+	struct msg_buf msg;
+} __packed;
+
+/* Output multi-line text using SCLP Message interface. */
+static void sclp_early_print_lm(const char *str, unsigned int len)
+{
+	unsigned char *ptr, *end, ch;
+	unsigned int count, offset;
+	struct write_sccb *sccb;
+	struct msg_buf *msg;
+	struct mdb *mdb;
+	struct mto *mto;
+	struct go *go;
+
+	sccb = (struct write_sccb *) &sclp_early_sccb;
+	end = (unsigned char *) sccb + sizeof(sclp_early_sccb) - 1;
+	memset(sccb, 0, sizeof(*sccb));
+	ptr = (unsigned char *) &sccb->msg.mdb.mto;
+	offset = 0;
+	do {
+		for (count = sizeof(*mto); offset < len; count++) {
+			ch = str[offset++];
+			if ((ch == 0x0a) || (ptr + count > end))
+				break;
+			ptr[count] = _ascebc[ch];
+		}
+		mto = (struct mto *) ptr;
+		memset(mto, 0, sizeof(*mto));
+		mto->length = count;
+		mto->type = 4;
+		mto->line_type_flags = LNTPFLGS_ENDTEXT;
+		ptr += count;
+	} while ((offset < len) && (ptr + sizeof(*mto) <= end));
+	len = ptr - (unsigned char *) sccb;
+	sccb->header.length = len - offsetof(struct write_sccb, header);
+	msg = &sccb->msg;
+	msg->header.type = EVTYP_MSG;
+	msg->header.length = len - offsetof(struct write_sccb, msg.header);
+	mdb = &msg->mdb;
+	mdb->header.type = 1;
+	mdb->header.tag = 0xD4C4C240;
+	mdb->header.revision_code = 1;
+	mdb->header.length = len - offsetof(struct write_sccb, msg.mdb.header);
+	go = &mdb->go;
+	go->length = sizeof(*go);
+	go->type = 1;
+	sclp_early_cmd(SCLP_CMDW_WRITE_EVENT_DATA, sccb);
+}
+
+struct vt220_sccb {
+	struct sccb_header header;
+	struct {
+		struct evbuf_header header;
+		char data[];
+	} msg;
+} __packed;
+
+/* Output multi-line text using SCLP VT220 interface. */
+static void sclp_early_print_vt220(const char *str, unsigned int len)
+{
+	struct vt220_sccb *sccb;
+
+	sccb = (struct vt220_sccb *) &sclp_early_sccb;
+	if (sizeof(*sccb) + len >= sizeof(sclp_early_sccb))
+		len = sizeof(sclp_early_sccb) - sizeof(*sccb);
+	memset(sccb, 0, sizeof(*sccb));
+	memcpy(&sccb->msg.data, str, len);
+	sccb->header.length = sizeof(*sccb) + len;
+	sccb->msg.header.length = sizeof(sccb->msg) + len;
+	sccb->msg.header.type = EVTYP_VT220MSG;
+	sclp_early_cmd(SCLP_CMDW_WRITE_EVENT_DATA, sccb);
+}
+
+int sclp_early_set_event_mask(struct init_sccb *sccb,
+			      unsigned long receive_mask,
+			      unsigned long send_mask)
+{
+	memset(sccb, 0, sizeof(*sccb));
+	sccb->header.length = sizeof(*sccb);
+	sccb->mask_length = sizeof(sccb_mask_t);
+	sccb->receive_mask = receive_mask;
+	sccb->send_mask = send_mask;
+	if (sclp_early_cmd(SCLP_CMDW_WRITE_EVENT_MASK, sccb))
+		return -EIO;
+	if (sccb->header.response_code != 0x20)
+		return -EIO;
+	return 0;
+}
+
+unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb)
+{
+	if (!(sccb->sclp_send_mask & EVTYP_OPCMD_MASK))
+		return 0;
+	if (!(sccb->sclp_receive_mask & (EVTYP_MSG_MASK | EVTYP_PMSGCMD_MASK)))
+		return 0;
+	return 1;
+}
+
+static int sclp_early_setup(int disable, int *have_linemode, int *have_vt220)
+{
+	unsigned long receive_mask, send_mask;
+	struct init_sccb *sccb;
+	int rc;
+
+	*have_linemode = *have_vt220 = 0;
+	sccb = (struct init_sccb *) &sclp_early_sccb;
+	receive_mask = disable ? 0 : EVTYP_OPCMD_MASK;
+	send_mask = disable ? 0 : EVTYP_VT220MSG_MASK | EVTYP_MSG_MASK;
+	rc = sclp_early_set_event_mask(sccb, receive_mask, send_mask);
+	if (rc)
+		return rc;
+	*have_linemode = sclp_early_con_check_linemode(sccb);
+	*have_vt220 = sccb->send_mask & EVTYP_VT220MSG_MASK;
+	return rc;
+}
+
+/*
+ * Output one or more lines of text on the SCLP console (VT220 and /
+ * or line-mode).
+ */
+void __sclp_early_printk(const char *str, unsigned int len)
+{
+	int have_linemode, have_vt220;
+
+	if (sclp_init_state != sclp_init_state_uninitialized)
+		return;
+	if (sclp_early_setup(0, &have_linemode, &have_vt220) != 0)
+		return;
+	if (have_linemode)
+		sclp_early_print_lm(str, len);
+	if (have_vt220)
+		sclp_early_print_vt220(str, len);
+	sclp_early_setup(1, &have_linemode, &have_vt220);
+}
+
+void sclp_early_printk(const char *str)
+{
+	__sclp_early_printk(str, strlen(str));
+}
diff --git a/drivers/s390/char/sclp_quiesce.c b/drivers/s390/char/sclp_quiesce.c
index 475e470d9768..e4958511168a 100644
--- a/drivers/s390/char/sclp_quiesce.c
+++ b/drivers/s390/char/sclp_quiesce.c
@@ -6,7 +6,6 @@
  *             Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
  */
 
-#include <linux/module.h>
 #include <linux/types.h>
 #include <linux/cpumask.h>
 #include <linux/smp.h>
@@ -80,5 +79,4 @@ static int __init sclp_quiesce_init(void)
 {
 	return sclp_register(&sclp_quiesce_event);
 }
-
-module_init(sclp_quiesce_init);
+device_initcall(sclp_quiesce_init);
diff --git a/drivers/s390/char/sclp_rw.c b/drivers/s390/char/sclp_rw.c
index 6010cd347a08..91b26df5227d 100644
--- a/drivers/s390/char/sclp_rw.c
+++ b/drivers/s390/char/sclp_rw.c
@@ -13,7 +13,7 @@
 #include <linux/string.h>
 #include <linux/spinlock.h>
 #include <linux/ctype.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "sclp.h"
 #include "sclp_rw.h"
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index 3c6e174e19b6..236b736ae136 100644
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -7,7 +7,6 @@
  *		 Martin Schwidefsky <schwidefsky@de.ibm.com>
  */
 
-#include <linux/module.h>
 #include <linux/kmod.h>
 #include <linux/tty.h>
 #include <linux/tty_driver.h>
@@ -16,7 +15,7 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/gfp.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "ctrlchar.h"
 #include "sclp.h"
@@ -573,4 +572,4 @@ sclp_tty_init(void)
 	sclp_tty_driver = driver;
 	return 0;
 }
-module_init(sclp_tty_init);
+device_initcall(sclp_tty_init);
diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index 68d6ee7ae504..095481d32236 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -26,7 +26,7 @@
 #include <linux/reboot.h>
 #include <linux/slab.h>
 
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include "sclp.h"
 #include "ctrlchar.h"
 
diff --git a/drivers/s390/char/tape_char.c b/drivers/s390/char/tape_char.c
index 77f9b9c2f701..46ac1164f242 100644
--- a/drivers/s390/char/tape_char.c
+++ b/drivers/s390/char/tape_char.c
@@ -18,7 +18,7 @@
 #include <linux/mtio.h>
 #include <linux/compat.h>
 
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #define TAPE_DBF_AREA	tape_core_dbf
 
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index 272cb6cd1b2a..e5ebe2fbee23 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -24,7 +24,7 @@
 #include <asm/ccwdev.h>
 #include <asm/cio.h>
 #include <asm/ebcdic.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "raw3270.h"
 #include "tty3270.h"
diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c
index 2a67b496a9e2..65f5a794f26d 100644
--- a/drivers/s390/char/vmcp.c
+++ b/drivers/s390/char/vmcp.c
@@ -21,7 +21,7 @@
 #include <asm/compat.h>
 #include <asm/cpcmd.h>
 #include <asm/debug.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include "vmcp.h"
 
 static debug_info_t *vmcp_debug;
diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c
index e883063c7258..57974a1e0e03 100644
--- a/drivers/s390/char/vmlogrdr.c
+++ b/drivers/s390/char/vmlogrdr.c
@@ -21,7 +21,7 @@
 #include <linux/interrupt.h>
 #include <linux/spinlock.h>
 #include <linux/atomic.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/cpcmd.h>
 #include <asm/debug.h>
 #include <asm/ebcdic.h>
@@ -870,7 +870,7 @@ static int __init vmlogrdr_init(void)
 		goto cleanup;
 
 	for (i=0; i < MAXMINOR; ++i ) {
-		sys_ser[i].buffer = (char *) get_zeroed_page(GFP_KERNEL);
+		sys_ser[i].buffer = (char *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
 		if (!sys_ser[i].buffer) {
 			rc = -ENOMEM;
 			break;
diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index ff18f373af9a..04aceb694d51 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -15,7 +15,7 @@
 #include <linux/slab.h>
 #include <linux/module.h>
 
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/cio.h>
 #include <asm/ccwdev.h>
 #include <asm/debug.h>
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 16992e2a40ad..aaed778f67c4 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -7,6 +7,7 @@
  *
  * Copyright IBM Corp. 2003, 2008
  * Author(s): Michael Holzheu
+ * License: GPL
  */
 
 #define KMSG_COMPONENT "zdump"
@@ -14,16 +15,14 @@
 
 #include <linux/init.h>
 #include <linux/slab.h>
-#include <linux/miscdevice.h>
 #include <linux/debugfs.h>
-#include <linux/module.h>
 #include <linux/memblock.h>
 
 #include <asm/asm-offsets.h>
 #include <asm/ipl.h>
 #include <asm/sclp.h>
 #include <asm/setup.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 #include <asm/debug.h>
 #include <asm/processor.h>
 #include <asm/irqflags.h>
@@ -273,7 +272,7 @@ static int __init zcore_reipl_init(void)
 		rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
 	else
 		rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);
-	if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
+	if (rc || (__force u32)csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
 	    ipib_info.checksum) {
 		TRACE("Checksum does not match\n");
 		free_page((unsigned long) ipl_block);
@@ -320,7 +319,7 @@ static int __init zcore_init(void)
 		goto fail;
 	}
 
-	pr_alert("DETECTED 'S390X (64 bit) OS'\n");
+	pr_alert("The dump process started for a 64-bit operating system\n");
 	rc = init_cpu_info();
 	if (rc)
 		goto fail;
@@ -364,22 +363,4 @@ fail:
 	diag308(DIAG308_REL_HSA, NULL);
 	return rc;
 }
-
-static void __exit zcore_exit(void)
-{
-	debug_unregister(zcore_dbf);
-	sclp_sdias_exit();
-	free_page((unsigned long) ipl_block);
-	debugfs_remove(zcore_hsa_file);
-	debugfs_remove(zcore_reipl_file);
-	debugfs_remove(zcore_memmap_file);
-	debugfs_remove(zcore_dir);
-	diag308(DIAG308_REL_HSA, NULL);
-}
-
-MODULE_AUTHOR("Copyright IBM Corp. 2003,2008");
-MODULE_DESCRIPTION("zcore module for zfcpdump support");
-MODULE_LICENSE("GPL");
-
 subsys_initcall(zcore_init);
-module_exit(zcore_exit);