Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Martin Schwidefsky:

 - three more patches in regard to the SPDX license tags. The missing
   tags for the files in arch/s390/kvm will be merged via the KVM tree.
   With that all s390 related files should have their SPDX tags.

 - a patch to get rid of 'struct timespec' in the DASD driver.

 - bug fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: fix compat system call table
  s390/mm: fix off-by-one bug in 5-level page table handling
  s390: Remove redudant license text
  s390: add a few more SPDX identifiers
  s390/dasd: prevent prefix I/O error
  s390: always save and restore all registers on context switch
  s390/dasd: remove 'struct timespec' usage
  s390/qdio: restrict target-full handling to IQDIO
  s390/qdio: consider ERROR buffers for inbound-full condition
  s390/virtio: add BSD license to virtio-ccw

arch/s390/Kbuild

+# SPDX-License-Identifier: GPL-2.0
 obj-y				+= kernel/
 obj-y				+= mm/
 obj-$(CONFIG_KVM)		+= kvm/

arch/s390/appldata/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the Linux - z/VM Monitor Stream.
 #

arch/s390/boot/compressed/vmlinux.scr

+/* SPDX-License-Identifier: GPL-2.0 */
 SECTIONS
 {
   .rodata.compressed : {

arch/s390/crypto/sha1_s390.c

+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Cryptographic API.
  *
@@ -16,12 +17,6 @@
  *   Copyright (c) Alan Smithee.
  *   Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
  *   Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
  */
 #include <crypto/internal/hash.h>
 #include <linux/init.h>

arch/s390/hypfs/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the linux hypfs filesystem routines.
 #

arch/s390/include/asm/Kbuild

+# SPDX-License-Identifier: GPL-2.0
 generic-y += asm-offsets.h
 generic-y += cacheflush.h
 generic-y += clkdev.h

arch/s390/include/asm/alternative.h

+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_S390_ALTERNATIVE_H
 #define _ASM_S390_ALTERNATIVE_H
 

arch/s390/include/asm/ap.h

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Adjunct processor (AP) interfaces
  *
  * Copyright IBM Corp. 2017
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License (version 2 only)
- * as published by the Free Software Foundation.
- *
  * Author(s): Tony Krowiak <akrowia@linux.vnet.ibm.com>
  *	      Martin Schwidefsky <schwidefsky@de.ibm.com>
  *	      Harald Freudenberger <freude@de.ibm.com>

arch/s390/include/asm/bugs.h

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  *  S390 version
  *    Copyright IBM Corp. 1999

arch/s390/include/asm/segment.h

+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_SEGMENT_H
 #define _ASM_SEGMENT_H
 

arch/s390/include/asm/switch_to.h

@@ -30,21 +30,20 @@ static inline void restore_access_regs(unsigned int *acrs)
 	asm volatile("lam 0,15,%0" : : "Q" (*(acrstype *)acrs));
 }
 
-#define switch_to(prev,next,last) do {					\
-	if (prev->mm) {							\
+#define switch_to(prev, next, last) do {				\
+	/* save_fpu_regs() sets the CIF_FPU flag, which enforces	\
+	 * a restore of the floating point / vector registers as	\
+	 * soon as the next task returns to user space			\
+	 */								\
 	save_fpu_regs();						\
 	save_access_regs(&prev->thread.acrs[0]);			\
 	save_ri_cb(prev->thread.ri_cb);					\
 	save_gs_cb(prev->thread.gs_cb);					\
-	}								\
 	update_cr_regs(next);						\
-	if (next->mm) {							\
-		set_cpu_flag(CIF_FPU);					\
 	restore_access_regs(&next->thread.acrs[0]);			\
 	restore_ri_cb(next->thread.ri_cb, prev->thread.ri_cb);		\
 	restore_gs_cb(next->thread.gs_cb);				\
-	}								\
-	prev = __switch_to(prev,next);					\
+	prev = __switch_to(prev, next);					\
 } while (0)
 
 #endif /* __ASM_SWITCH_TO_H */

arch/s390/include/asm/vga.h

+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_S390_VGA_H
 #define _ASM_S390_VGA_H
 

arch/s390/include/uapi/asm/Kbuild

+# SPDX-License-Identifier: GPL-2.0
 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 

arch/s390/include/uapi/asm/perf_regs.h

+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _ASM_S390_PERF_REGS_H
 #define _ASM_S390_PERF_REGS_H
 

arch/s390/include/uapi/asm/sthyi.h

+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI_ASM_STHYI_H
 #define _UAPI_ASM_STHYI_H
 

arch/s390/include/uapi/asm/virtio-ccw.h

-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
 /*
  * Definitions for virtio-ccw devices.
  *

arch/s390/include/uapi/asm/vmcp.h

+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  * Copyright IBM Corp. 2004, 2005
  * Interface implementation for communication with the z/VM control program

arch/s390/kernel/alternative.c

+// SPDX-License-Identifier: GPL-2.0
 #include <linux/module.h>
 #include <asm/alternative.h>
 #include <asm/facility.h>

arch/s390/kernel/perf_regs.c

+// SPDX-License-Identifier: GPL-2.0
 #include <linux/perf_event.h>
 #include <linux/perf_regs.h>
 #include <linux/kernel.h>

arch/s390/kernel/syscalls.S

@@ -370,10 +370,10 @@ SYSCALL(sys_recvmmsg,compat_sys_recvmmsg)
 SYSCALL(sys_sendmmsg,compat_sys_sendmmsg)
 SYSCALL(sys_socket,sys_socket)
 SYSCALL(sys_socketpair,compat_sys_socketpair)		/* 360 */
-SYSCALL(sys_bind,sys_bind)
-SYSCALL(sys_connect,sys_connect)
+SYSCALL(sys_bind,compat_sys_bind)
+SYSCALL(sys_connect,compat_sys_connect)
 SYSCALL(sys_listen,sys_listen)
-SYSCALL(sys_accept4,sys_accept4)
+SYSCALL(sys_accept4,compat_sys_accept4)
 SYSCALL(sys_getsockopt,compat_sys_getsockopt)		/* 365 */
 SYSCALL(sys_setsockopt,compat_sys_setsockopt)
 SYSCALL(sys_getsockname,compat_sys_getsockname)

arch/s390/kernel/vdso64/note.S

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
  * Here we can supply some information useful to userland.

arch/s390/mm/pgalloc.c

@@ -83,8 +83,6 @@ int crst_table_upgrade(struct mm_struct *mm, unsigned long end)
 
 	/* upgrade should only happen from 3 to 4, 3 to 5, or 4 to 5 levels */
 	VM_BUG_ON(mm->context.asce_limit < _REGION2_SIZE);
-	if (end >= TASK_SIZE_MAX)
-		return -ENOMEM;
 	rc = 0;
 	notify = 0;
 	while (mm->context.asce_limit < end) {

arch/s390/net/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Arch-specific network modules
 #

arch/s390/numa/Makefile

+# SPDX-License-Identifier: GPL-2.0
 obj-y			+= numa.o
 obj-y			+= toptree.o
 obj-$(CONFIG_NUMA_EMU)	+= mode_emu.o

arch/s390/pci/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the s390 PCI subsystem.
 #

arch/s390/tools/gen_opcode_table.c

+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Generate opcode table initializers for the in-kernel disassembler.
  *

drivers/s390/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the S/390 specific device drivers
 #

drivers/s390/block/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 comment "S/390 block device drivers"
 	depends on S390 && BLOCK
 

drivers/s390/block/dasd.c

@@ -759,7 +759,7 @@ static void dasd_profile_end_add_data(struct dasd_profile_info *data,
 	/* in case of an overflow, reset the whole profile */
 	if (data->dasd_io_reqs == UINT_MAX) {
 			memset(data, 0, sizeof(*data));
-			getnstimeofday(&data->starttod);
+			ktime_get_real_ts64(&data->starttod);
 	}
 	data->dasd_io_reqs++;
 	data->dasd_io_sects += sectors;
@@ -894,7 +894,7 @@ void dasd_profile_reset(struct dasd_profile *profile)
 		return;
 	}
 	memset(data, 0, sizeof(*data));
-	getnstimeofday(&data->starttod);
+	ktime_get_real_ts64(&data->starttod);
 	spin_unlock_bh(&profile->lock);
 }
 
@@ -911,7 +911,7 @@ int dasd_profile_on(struct dasd_profile *profile)
 		kfree(data);
 		return 0;
 	}
-	getnstimeofday(&data->starttod);
+	ktime_get_real_ts64(&data->starttod);
 	profile->data = data;
 	spin_unlock_bh(&profile->lock);
 	return 0;
@@ -995,8 +995,8 @@ static void dasd_stats_array(struct seq_file *m, unsigned int *array)
 static void dasd_stats_seq_print(struct seq_file *m,
 				 struct dasd_profile_info *data)
 {
-	seq_printf(m, "start_time %ld.%09ld\n",
-		   data->starttod.tv_sec, data->starttod.tv_nsec);
+	seq_printf(m, "start_time %lld.%09ld\n",
+		   (s64)data->starttod.tv_sec, data->starttod.tv_nsec);
 	seq_printf(m, "total_requests %u\n", data->dasd_io_reqs);
 	seq_printf(m, "total_sectors %u\n", data->dasd_io_sects);
 	seq_printf(m, "total_pav %u\n", data->dasd_io_alias);

drivers/s390/block/dasd_eckd.c

@@ -531,9 +531,11 @@ static int prefix_LRE(struct ccw1 *ccw, struct PFX_eckd_data *pfxdata,
 	pfxdata->validity.define_extent = 1;
 
 	/* private uid is kept up to date, conf_data may be outdated */
-	if (startpriv->uid.type != UA_BASE_DEVICE) {
+	if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
+		pfxdata->validity.verify_base = 1;
+
+	if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
 		pfxdata->validity.verify_base = 1;
-		if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
 		pfxdata->validity.hyper_pav = 1;
 	}
 
@@ -3415,9 +3417,11 @@ static int prepare_itcw(struct itcw *itcw,
 	pfxdata.validity.define_extent = 1;
 
 	/* private uid is kept up to date, conf_data may be outdated */
-	if (startpriv->uid.type != UA_BASE_DEVICE) {
+	if (startpriv->uid.type == UA_BASE_PAV_ALIAS)
+		pfxdata.validity.verify_base = 1;
+
+	if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
 		pfxdata.validity.verify_base = 1;
-		if (startpriv->uid.type == UA_HYPER_PAV_ALIAS)
 		pfxdata.validity.hyper_pav = 1;
 	}
 

drivers/s390/block/dasd_int.h

@@ -441,7 +441,7 @@ struct dasd_profile_info {
 	unsigned int dasd_io_nr_req[32]; /* hist. of # of requests in chanq */
 
 	/* new data */
-	struct timespec starttod;	   /* time of start or last reset */
+	struct timespec64 starttod;	   /* time of start or last reset */
 	unsigned int dasd_io_alias;	   /* requests using an alias */
 	unsigned int dasd_io_tpm;	   /* requests using transport mode */
 	unsigned int dasd_read_reqs;	   /* total number of read  requests */

drivers/s390/char/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 comment "S/390 character device drivers"
 	depends on S390
 

drivers/s390/char/defkeymap.map

+# SPDX-License-Identifier: GPL-2.0
 # Default keymap for 3270 (ebcdic codepage 037).
 keymaps 0-1,4-5
 

drivers/s390/cio/blacklist.h

+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef S390_BLACKLIST_H
 #define S390_BLACKLIST_H
 

drivers/s390/cio/qdio_main.c

@@ -431,8 +431,8 @@ static void process_buffer_error(struct qdio_q *q, int count)
 	q->qdio_error = QDIO_ERROR_SLSB_STATE;
 
 	/* special handling for no target buffer empty */
-	if ((!q->is_input_q &&
-	    (q->sbal[q->first_to_check]->element[15].sflags) == 0x10)) {
+	if (queue_type(q) == QDIO_IQDIO_QFMT && !q->is_input_q &&
+	    q->sbal[q->first_to_check]->element[15].sflags == 0x10) {
 		qperf_inc(q, target_full);
 		DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "OUTFULL FTC:%02x",
 			      q->first_to_check);
@@ -536,7 +536,8 @@ static int get_inbound_buffer_frontier(struct qdio_q *q)
 	case SLSB_P_INPUT_ERROR:
 		process_buffer_error(q, count);
 		q->first_to_check = add_buf(q->first_to_check, count);
-		atomic_sub(count, &q->nr_buf_used);
+		if (atomic_sub_return(count, &q->nr_buf_used) == 0)
+			qperf_inc(q, inbound_queue_full);
 		if (q->irq_ptr->perf_stat_enabled)
 			account_sbals_error(q, count);
 		break;

drivers/s390/net/Kconfig

+# SPDX-License-Identifier: GPL-2.0
 menu "S/390 network device drivers"
 	depends on NETDEVICES && S390
 

drivers/s390/scsi/Makefile

+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the S/390 specific device drivers
 #