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

@@ -31,19 +31,18 @@ static inline void restore_access_regs(unsigned int *acrs)
 }
 
 #define switch_to(prev, next, last) do {				\
-	if (prev->mm) {							\
+	/* 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);					\
 } while (0)
 

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)