37 files changed, 66 insertions, 45 deletions

diff --git a/arch/s390/Kbuild b/arch/s390/Kbuild
index eae2c64cf69d..9fdff3fe1a42 100644
--- a/arch/s390/Kbuild
+++ b/arch/s390/Kbuild
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 obj-y                           += kernel/
 obj-y                           += mm/
 obj-$(CONFIG_KVM)               += kvm/
diff --git a/arch/s390/appldata/Makefile b/arch/s390/appldata/Makefile
index 99f1cf071304..b06def4a4f2f 100644
--- a/arch/s390/appldata/Makefile
+++ b/arch/s390/appldata/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the Linux - z/VM Monitor Stream.
 #
diff --git a/arch/s390/boot/compressed/vmlinux.scr b/arch/s390/boot/compressed/vmlinux.scr
index f02382ae5c48..42a242597f34 100644
--- a/arch/s390/boot/compressed/vmlinux.scr
+++ b/arch/s390/boot/compressed/vmlinux.scr
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 SECTIONS
 {
   .rodata.compressed : {
diff --git a/arch/s390/crypto/sha1_s390.c b/arch/s390/crypto/sha1_s390.c
index c7de53d8da75..a00c17f761c1 100644
--- a/arch/s390/crypto/sha1_s390.c
+++ b/arch/s390/crypto/sha1_s390.c
@@ -1,3 +1,4 @@
+// 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>
diff --git a/arch/s390/hypfs/Makefile b/arch/s390/hypfs/Makefile
index 2ee25ba252d6..06f601509ce9 100644
--- a/arch/s390/hypfs/Makefile
+++ b/arch/s390/hypfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the linux hypfs filesystem routines.
 #
diff --git a/arch/s390/include/asm/Kbuild b/arch/s390/include/asm/Kbuild
index 41c211a4d8b1..048450869328 100644
--- a/arch/s390/include/asm/Kbuild
+++ b/arch/s390/include/asm/Kbuild
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 generic-y += asm-offsets.h
 generic-y += cacheflush.h
 generic-y += clkdev.h
diff --git a/arch/s390/include/asm/alternative.h b/arch/s390/include/asm/alternative.h
index a72002056b54..c2cf7bcdef9b 100644
--- a/arch/s390/include/asm/alternative.h
+++ b/arch/s390/include/asm/alternative.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_S390_ALTERNATIVE_H
 #define _ASM_S390_ALTERNATIVE_H
 
diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
index c02f4aba88a6..cfce6835b109 100644
--- a/arch/s390/include/asm/ap.h
+++ b/arch/s390/include/asm/ap.h
@@ -1,12 +1,9 @@
+/* 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>
diff --git a/arch/s390/include/asm/bugs.h b/arch/s390/include/asm/bugs.h
index 0f5bd894f4dc..aa42a179be33 100644
--- a/arch/s390/include/asm/bugs.h
+++ b/arch/s390/include/asm/bugs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  *  S390 version
  *    Copyright IBM Corp. 1999
diff --git a/arch/s390/include/asm/segment.h b/arch/s390/include/asm/segment.h
index 8bfce3475b1c..97a0582b8d0f 100644
--- a/arch/s390/include/asm/segment.h
+++ b/arch/s390/include/asm/segment.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_SEGMENT_H
 #define _ASM_SEGMENT_H
 
diff --git a/arch/s390/include/asm/switch_to.h b/arch/s390/include/asm/switch_to.h
index ec7b476c1ac5..c61b2cc1a8a8 100644
--- a/arch/s390/include/asm/switch_to.h
+++ b/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) {                                                 \
-                save_fpu_regs();                                        \
-                save_access_regs(&prev->thread.acrs[0]);                \
-                save_ri_cb(prev->thread.ri_cb);                         \
-                save_gs_cb(prev->thread.gs_cb);                         \
-        }                                                               \
+#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);                                  \
+        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);                                 \
 } while (0)
 
 #endif /* __ASM_SWITCH_TO_H */
diff --git a/arch/s390/include/asm/vga.h b/arch/s390/include/asm/vga.h
index d375526c261f..605dc46bac5e 100644
--- a/arch/s390/include/asm/vga.h
+++ b/arch/s390/include/asm/vga.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ASM_S390_VGA_H
 #define _ASM_S390_VGA_H
 
diff --git a/arch/s390/include/uapi/asm/Kbuild b/arch/s390/include/uapi/asm/Kbuild
index 098f28778a13..92b7c9b3e641 100644
--- a/arch/s390/include/uapi/asm/Kbuild
+++ b/arch/s390/include/uapi/asm/Kbuild
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
diff --git a/arch/s390/include/uapi/asm/perf_regs.h b/arch/s390/include/uapi/asm/perf_regs.h
index 7c8564f98205..d17dd9e5d516 100644
--- a/arch/s390/include/uapi/asm/perf_regs.h
+++ b/arch/s390/include/uapi/asm/perf_regs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _ASM_S390_PERF_REGS_H
 #define _ASM_S390_PERF_REGS_H
 
diff --git a/arch/s390/include/uapi/asm/sthyi.h b/arch/s390/include/uapi/asm/sthyi.h
index ec113db4eb7e..b1b022316983 100644
--- a/arch/s390/include/uapi/asm/sthyi.h
+++ b/arch/s390/include/uapi/asm/sthyi.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _UAPI_ASM_STHYI_H
 #define _UAPI_ASM_STHYI_H
 
diff --git a/arch/s390/include/uapi/asm/virtio-ccw.h b/arch/s390/include/uapi/asm/virtio-ccw.h
index 3a77833c74dc..2b605f7e8483 100644
--- a/arch/s390/include/uapi/asm/virtio-ccw.h
+++ b/arch/s390/include/uapi/asm/virtio-ccw.h
@@ -1,4 +1,4 @@
-/* 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.
  *
diff --git a/arch/s390/include/uapi/asm/vmcp.h b/arch/s390/include/uapi/asm/vmcp.h
index 4caf71714a55..aeaaa030030e 100644
--- a/arch/s390/include/uapi/asm/vmcp.h
+++ b/arch/s390/include/uapi/asm/vmcp.h
@@ -1,3 +1,4 @@
+/* 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
diff --git a/arch/s390/kernel/alternative.c b/arch/s390/kernel/alternative.c
index 315986a06cf5..574e77622c04 100644
--- a/arch/s390/kernel/alternative.c
+++ b/arch/s390/kernel/alternative.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/module.h>
 #include <asm/alternative.h>
 #include <asm/facility.h>
diff --git a/arch/s390/kernel/perf_regs.c b/arch/s390/kernel/perf_regs.c
index f8603ebed669..54e2d634b849 100644
--- a/arch/s390/kernel/perf_regs.c
+++ b/arch/s390/kernel/perf_regs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 #include <linux/perf_event.h>
 #include <linux/perf_regs.h>
 #include <linux/kernel.h>
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 308a7b63348b..f7fc63385553 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/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)
diff --git a/arch/s390/kernel/vdso64/note.S b/arch/s390/kernel/vdso64/note.S
index 79a071e4357e..db19d0680a0a 100644
--- a/arch/s390/kernel/vdso64/note.S
+++ b/arch/s390/kernel/vdso64/note.S
@@ -1,3 +1,4 @@
+/* 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.
diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c
index 434a9564917b..cb364153c43c 100644
--- a/arch/s390/mm/pgalloc.c
+++ b/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) {
diff --git a/arch/s390/net/Makefile b/arch/s390/net/Makefile
index 90568c33ddb0..e0d5f245e42b 100644
--- a/arch/s390/net/Makefile
+++ b/arch/s390/net/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Arch-specific network modules
 #
diff --git a/arch/s390/numa/Makefile b/arch/s390/numa/Makefile
index f94ecaffa71b..66c2dff74895 100644
--- a/arch/s390/numa/Makefile
+++ b/arch/s390/numa/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 obj-y                   += numa.o
 obj-y                   += toptree.o
 obj-$(CONFIG_NUMA_EMU)  += mode_emu.o
diff --git a/arch/s390/pci/Makefile b/arch/s390/pci/Makefile
index 805d8b29193a..22d0871291ee 100644
--- a/arch/s390/pci/Makefile
+++ b/arch/s390/pci/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the s390 PCI subsystem.
 #
diff --git a/arch/s390/tools/gen_opcode_table.c b/arch/s390/tools/gen_opcode_table.c
index 01d4c5a4bfe9..357d42681cef 100644
--- a/arch/s390/tools/gen_opcode_table.c
+++ b/arch/s390/tools/gen_opcode_table.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * Generate opcode table initializers for the in-kernel disassembler.
  *
diff --git a/drivers/s390/Makefile b/drivers/s390/Makefile
index e5225ad9c5b1..2fdab400c1fe 100644
--- a/drivers/s390/Makefile
+++ b/drivers/s390/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the S/390 specific device drivers
 #
diff --git a/drivers/s390/block/Kconfig b/drivers/s390/block/Kconfig
index 31f014b57bfc..bc27d716aa6b 100644
--- a/drivers/s390/block/Kconfig
+++ b/drivers/s390/block/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 comment "S/390 block device drivers"
         depends on S390 && BLOCK
 
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 66e008f7adb6..d4e8dff673cc 100644
--- a/drivers/s390/block/dasd.c
+++ b/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);
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 1a41ef496338..a2edf2a7ace9 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -531,10 +531,12 @@ 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.hyper_pav = 1;
+
+        if (startpriv->uid.type == UA_HYPER_PAV_ALIAS) {
+                pfxdata->validity.verify_base = 1;
+                pfxdata->validity.hyper_pav = 1;
         }
 
         rc = define_extent(NULL, dedata, trk, totrk, cmd, basedev, blksize);
@@ -3415,10 +3417,12 @@ 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;
+                pfxdata.validity.hyper_pav = 1;
         }
 
         switch (cmd) {
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index b095a23bcc0c..96709b1a7bf8 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/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 */
diff --git a/drivers/s390/char/Kconfig b/drivers/s390/char/Kconfig
index 97c4c9fdd53d..ab0b243a947d 100644
--- a/drivers/s390/char/Kconfig
+++ b/drivers/s390/char/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 comment "S/390 character device drivers"
         depends on S390
 
diff --git a/drivers/s390/char/defkeymap.map b/drivers/s390/char/defkeymap.map
index 353b3f268824..f4c095612a02 100644
--- a/drivers/s390/char/defkeymap.map
+++ b/drivers/s390/char/defkeymap.map
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 # Default keymap for 3270 (ebcdic codepage 037).
 keymaps 0-1,4-5
 
diff --git a/drivers/s390/cio/blacklist.h b/drivers/s390/cio/blacklist.h
index 95e25c1df922..140e3e4ee2fd 100644
--- a/drivers/s390/cio/blacklist.h
+++ b/drivers/s390/cio/blacklist.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef S390_BLACKLIST_H
 #define S390_BLACKLIST_H
 
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 59b4a3370cd5..95b0efe28afb 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/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;
diff --git a/drivers/s390/net/Kconfig b/drivers/s390/net/Kconfig
index b2837b1c70b7..a782a207ad31 100644
--- a/drivers/s390/net/Kconfig
+++ b/drivers/s390/net/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 menu "S/390 network device drivers"
         depends on NETDEVICES && S390
 
diff --git a/drivers/s390/scsi/Makefile b/drivers/s390/scsi/Makefile
index 9259039e886d..9dda431ec8f3 100644
--- a/drivers/s390/scsi/Makefile
+++ b/drivers/s390/scsi/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the S/390 specific device drivers
 #