Merge commit 'origin/master' into next

Conflicts:
	include/linux/kvm.h

16 files changed, 77 insertions, 188 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 43c0acad7160..16c673096a22 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -95,6 +95,34 @@ config S390
 	select HAVE_ARCH_TRACEHOOK
 	select INIT_ALL_POSSIBLE
 	select HAVE_PERF_EVENTS
+	select ARCH_INLINE_SPIN_TRYLOCK
+	select ARCH_INLINE_SPIN_TRYLOCK_BH
+	select ARCH_INLINE_SPIN_LOCK
+	select ARCH_INLINE_SPIN_LOCK_BH
+	select ARCH_INLINE_SPIN_LOCK_IRQ
+	select ARCH_INLINE_SPIN_LOCK_IRQSAVE
+	select ARCH_INLINE_SPIN_UNLOCK
+	select ARCH_INLINE_SPIN_UNLOCK_BH
+	select ARCH_INLINE_SPIN_UNLOCK_IRQ
+	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
+	select ARCH_INLINE_READ_TRYLOCK
+	select ARCH_INLINE_READ_LOCK
+	select ARCH_INLINE_READ_LOCK_BH
+	select ARCH_INLINE_READ_LOCK_IRQ
+	select ARCH_INLINE_READ_LOCK_IRQSAVE
+	select ARCH_INLINE_READ_UNLOCK
+	select ARCH_INLINE_READ_UNLOCK_BH
+	select ARCH_INLINE_READ_UNLOCK_IRQ
+	select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
+	select ARCH_INLINE_WRITE_TRYLOCK
+	select ARCH_INLINE_WRITE_LOCK
+	select ARCH_INLINE_WRITE_LOCK_BH
+	select ARCH_INLINE_WRITE_LOCK_IRQ
+	select ARCH_INLINE_WRITE_LOCK_IRQSAVE
+	select ARCH_INLINE_WRITE_UNLOCK
+	select ARCH_INLINE_WRITE_UNLOCK_BH
+	select ARCH_INLINE_WRITE_UNLOCK_IRQ
+	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
 
 config SCHED_OMIT_FRAME_POINTER
 	bool
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index b55fd7ed1c31..495589950dc7 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -61,12 +61,12 @@ static struct ctl_table appldata_table[] = {
 	{
 		.procname	= "timer",
 		.mode		= S_IRUGO | S_IWUSR,
-		.proc_handler	= &appldata_timer_handler,
+		.proc_handler	= appldata_timer_handler,
 	},
 	{
 		.procname	= "interval",
 		.mode		= S_IRUGO | S_IWUSR,
-		.proc_handler	= &appldata_interval_handler,
+		.proc_handler	= appldata_interval_handler,
 	},
 	{ },
 };
diff --git a/arch/s390/appldata/appldata_net_sum.c b/arch/s390/appldata/appldata_net_sum.c
index fa741f84c5b9..4ce7fa95880f 100644
--- a/arch/s390/appldata/appldata_net_sum.c
+++ b/arch/s390/appldata/appldata_net_sum.c
@@ -83,8 +83,9 @@ static void appldata_get_net_sum_data(void *data)
 	rx_dropped = 0;
 	tx_dropped = 0;
 	collisions = 0;
-	read_lock(&dev_base_lock);
-	for_each_netdev(&init_net, dev) {
+
+	rcu_read_lock();
+	for_each_netdev_rcu(&init_net, dev) {
 		const struct net_device_stats *stats = dev_get_stats(dev);
 
 		rx_packets += stats->rx_packets;
@@ -98,7 +99,8 @@ static void appldata_get_net_sum_data(void *data)
 		collisions += stats->collisions;
 		i++;
 	}
-	read_unlock(&dev_base_lock);
+	rcu_read_unlock();
+
 	net_data->nr_interfaces = i;
 	net_data->rx_packets = rx_packets;
 	net_data->tx_packets = tx_packets;
diff --git a/arch/s390/include/asm/bug.h b/arch/s390/include/asm/bug.h
index 7efd0abe8887..efb74fd5156e 100644
--- a/arch/s390/include/asm/bug.h
+++ b/arch/s390/include/asm/bug.h
@@ -49,7 +49,7 @@
 
 #define BUG() do {					\
 	__EMIT_BUG(0);					\
-	for (;;);					\
+	unreachable();					\
 } while (0)
 
 #define WARN_ON(x) ({					\
diff --git a/arch/s390/include/asm/cacheflush.h b/arch/s390/include/asm/cacheflush.h
index 49d5af916d01..405cc97c6249 100644
--- a/arch/s390/include/asm/cacheflush.h
+++ b/arch/s390/include/asm/cacheflush.h
@@ -10,6 +10,7 @@
 #define flush_cache_dup_mm(mm)			do { } while (0)
 #define flush_cache_range(vma, start, end)	do { } while (0)
 #define flush_cache_page(vma, vmaddr, pfn)	do { } while (0)
+#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
 #define flush_dcache_page(page)			do { } while (0)
 #define flush_dcache_mmap_lock(mapping)		do { } while (0)
 #define flush_dcache_mmap_unlock(mapping)	do { } while (0)
diff --git a/arch/s390/include/asm/kvm.h b/arch/s390/include/asm/kvm.h
index 3dfcaeb5d7f4..82b32a100c7d 100644
--- a/arch/s390/include/asm/kvm.h
+++ b/arch/s390/include/asm/kvm.h
@@ -1,6 +1,5 @@
 #ifndef __LINUX_KVM_S390_H
 #define __LINUX_KVM_S390_H
-
 /*
  * asm-s390/kvm.h - KVM s390 specific structures and definitions
  *
@@ -15,6 +14,8 @@
  */
 #include <linux/types.h>
 
+#define __KVM_S390
+
 /* for KVM_GET_REGS and KVM_SET_REGS */
 struct kvm_regs {
 	/* general purpose regs for s390 */
diff --git a/arch/s390/include/asm/socket.h b/arch/s390/include/asm/socket.h
index e42df89a0b85..fdff1e995c73 100644
--- a/arch/s390/include/asm/socket.h
+++ b/arch/s390/include/asm/socket.h
@@ -68,4 +68,6 @@
 #define SO_PROTOCOL		38
 #define SO_DOMAIN		39
 
+#define SO_RXQ_OVFL             40
+
 #endif /* _ASM_SOCKET_H */
diff --git a/arch/s390/include/asm/spinlock.h b/arch/s390/include/asm/spinlock.h
index 41ce6861174e..c9af0d19c7ab 100644
--- a/arch/s390/include/asm/spinlock.h
+++ b/arch/s390/include/asm/spinlock.h
@@ -191,33 +191,4 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
 #define _raw_read_relax(lock)	cpu_relax()
 #define _raw_write_relax(lock)	cpu_relax()
 
-#define __always_inline__spin_lock
-#define __always_inline__read_lock
-#define __always_inline__write_lock
-#define __always_inline__spin_lock_bh
-#define __always_inline__read_lock_bh
-#define __always_inline__write_lock_bh
-#define __always_inline__spin_lock_irq
-#define __always_inline__read_lock_irq
-#define __always_inline__write_lock_irq
-#define __always_inline__spin_lock_irqsave
-#define __always_inline__read_lock_irqsave
-#define __always_inline__write_lock_irqsave
-#define __always_inline__spin_trylock
-#define __always_inline__read_trylock
-#define __always_inline__write_trylock
-#define __always_inline__spin_trylock_bh
-#define __always_inline__spin_unlock
-#define __always_inline__read_unlock
-#define __always_inline__write_unlock
-#define __always_inline__spin_unlock_bh
-#define __always_inline__read_unlock_bh
-#define __always_inline__write_unlock_bh
-#define __always_inline__spin_unlock_irq
-#define __always_inline__read_unlock_irq
-#define __always_inline__write_unlock_irq
-#define __always_inline__spin_unlock_irqrestore
-#define __always_inline__read_unlock_irqrestore
-#define __always_inline__write_unlock_irqrestore
-
 #endif /* __ASM_SPINLOCK_H */
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 0debcec23a39..fda1a8123f9b 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -527,59 +527,6 @@ asmlinkage long sys32_sendfile64(int out_fd, int in_fd,
 	return ret;
 }
 
-#ifdef CONFIG_SYSCTL_SYSCALL
-struct __sysctl_args32 {
-	u32 name;
-	int nlen;
-	u32 oldval;
-	u32 oldlenp;
-	u32 newval;
-	u32 newlen;
-	u32 __unused[4];
-};
-
-asmlinkage long sys32_sysctl(struct __sysctl_args32 __user *args)
-{
-	struct __sysctl_args32 tmp;
-	int error;
-	size_t oldlen;
-	size_t __user *oldlenp = NULL;
-	unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
-
-	if (copy_from_user(&tmp, args, sizeof(tmp)))
-		return -EFAULT;
-
-	if (tmp.oldval && tmp.oldlenp) {
-		/* Duh, this is ugly and might not work if sysctl_args
-		   is in read-only memory, but do_sysctl does indirectly
-		   a lot of uaccess in both directions and we'd have to
-		   basically copy the whole sysctl.c here, and
-		   glibc's __sysctl uses rw memory for the structure
-		   anyway.  */
-		if (get_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)) ||
-		    put_user(oldlen, (size_t __user *)addr))
-			return -EFAULT;
-		oldlenp = (size_t __user *)addr;
-	}
-
-	lock_kernel();
-	error = do_sysctl(compat_ptr(tmp.name), tmp.nlen, compat_ptr(tmp.oldval),
-			  oldlenp, compat_ptr(tmp.newval), tmp.newlen);
-	unlock_kernel();
-	if (oldlenp) {
-		if (!error) {
-			if (get_user(oldlen, (size_t __user *)addr) ||
-			    put_user(oldlen, (u32 __user *)compat_ptr(tmp.oldlenp)))
-				error = -EFAULT;
-		}
-		if (copy_to_user(args->__unused, tmp.__unused,
-				 sizeof(tmp.__unused)))
-			error = -EFAULT;
-	}
-	return error;
-}
-#endif
-
 struct stat64_emu31 {
 	unsigned long long  st_dev;
 	unsigned int    __pad1;
diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h
index c07f9ca05ade..45e9092b3aad 100644
--- a/arch/s390/kernel/compat_linux.h
+++ b/arch/s390/kernel/compat_linux.h
@@ -162,7 +162,6 @@ struct ucontext32 {
 	compat_sigset_t		uc_sigmask;	/* mask last for extensibility */
 };
 
-struct __sysctl_args32;
 struct stat64_emu31;
 struct mmap_arg_struct_emu31;
 struct fadvise64_64_args;
@@ -212,7 +211,6 @@ long sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
 		    size_t count);
 long sys32_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset,
 		      s32 count);
-long sys32_sysctl(struct __sysctl_args32 __user *args);
 long sys32_stat64(char __user * filename, struct stat64_emu31 __user * statbuf);
 long sys32_lstat64(char __user * filename,
 		   struct stat64_emu31 __user * statbuf);
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index cbd9901dc0f8..30de2d0e52bb 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -689,8 +689,6 @@ sys32_fdatasync_wrapper:
 	llgfr	%r2,%r2			# unsigned int
 	jg	sys_fdatasync		# branch to system call
 
-#sys32_sysctl_wrapper			# tbd
-
 	.globl	sys32_mlock_wrapper
 sys32_mlock_wrapper:
 	llgfr	%r2,%r2			# unsigned long
@@ -1087,8 +1085,8 @@ sys32_stime_wrapper:
 
 	.globl	sys32_sysctl_wrapper
 sys32_sysctl_wrapper:
-	llgtr	%r2,%r2 		# struct __sysctl_args32 *
-	jg	sys32_sysctl
+	llgtr	%r2,%r2 		# struct compat_sysctl_args *
+	jg	compat_sys_sysctl
 
 	.globl	sys32_fstat64_wrapper
 sys32_fstat64_wrapper:
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 20f282c911c2..071c81f179ef 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -893,35 +893,30 @@ s390dbf_procactive(ctl_table *table, int write,
 
 static struct ctl_table s390dbf_table[] = {
 	{
-		.ctl_name       = CTL_S390DBF_STOPPABLE,
 		.procname       = "debug_stoppable",
 		.data		= &debug_stoppable,
 		.maxlen		= sizeof(int),
 		.mode           = S_IRUGO | S_IWUSR,
-		.proc_handler   = &proc_dointvec,
-		.strategy	= &sysctl_intvec,
+		.proc_handler   = proc_dointvec,
 	},
 	 {
-		.ctl_name       = CTL_S390DBF_ACTIVE,
 		.procname       = "debug_active",
 		.data		= &debug_active,
 		.maxlen		= sizeof(int),
 		.mode           = S_IRUGO | S_IWUSR,
-		.proc_handler   = &s390dbf_procactive,
-		.strategy	= &sysctl_intvec,
+		.proc_handler   = s390dbf_procactive,
 	},
-	{ .ctl_name = 0 }
+	{ }
 };
 
 static struct ctl_table s390dbf_dir_table[] = {
 	{
-		.ctl_name       = CTL_S390DBF,
 		.procname       = "s390dbf",
 		.maxlen         = 0,
 		.mode           = S_IRUGO | S_IXUGO,
 		.child          = s390dbf_table,
 	},
-	{ .ctl_name = 0 }
+	{ }
 };
 
 static struct ctl_table_header *s390dbf_sysctl_header;
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index f5fe34dd821b..5a82bc68193e 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -203,73 +203,10 @@ out:
 
 #ifdef CONFIG_FTRACE_SYSCALLS
 
-extern unsigned long __start_syscalls_metadata[];
-extern unsigned long __stop_syscalls_metadata[];
 extern unsigned int sys_call_table[];
 
-static struct syscall_metadata **syscalls_metadata;
-
-struct syscall_metadata *syscall_nr_to_meta(int nr)
-{
-	if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
-		return NULL;
-
-	return syscalls_metadata[nr];
-}
-
-int syscall_name_to_nr(char *name)
-{
-	int i;
-
-	if (!syscalls_metadata)
-		return -1;
-	for (i = 0; i < NR_syscalls; i++)
-		if (syscalls_metadata[i])
-			if (!strcmp(syscalls_metadata[i]->name, name))
-				return i;
-	return -1;
-}
-
-void set_syscall_enter_id(int num, int id)
-{
-	syscalls_metadata[num]->enter_id = id;
-}
-
-void set_syscall_exit_id(int num, int id)
+unsigned long __init arch_syscall_addr(int nr)
 {
-	syscalls_metadata[num]->exit_id = id;
-}
-
-static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
-{
-	struct syscall_metadata *start;
-	struct syscall_metadata *stop;
-	char str[KSYM_SYMBOL_LEN];
-
-	start = (struct syscall_metadata *)__start_syscalls_metadata;
-	stop = (struct syscall_metadata *)__stop_syscalls_metadata;
-	kallsyms_lookup(syscall, NULL, NULL, NULL, str);
-
-	for ( ; start < stop; start++) {
-		if (start->name && !strcmp(start->name + 3, str + 3))
-			return start;
-	}
-	return NULL;
-}
-
-static int __init arch_init_ftrace_syscalls(void)
-{
-	struct syscall_metadata *meta;
-	int i;
-	syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) * NR_syscalls,
-				    GFP_KERNEL);
-	if (!syscalls_metadata)
-		return -ENOMEM;
-	for (i = 0; i < NR_syscalls; i++) {
-		meta = find_syscall_meta((unsigned long)sys_call_table[i]);
-		syscalls_metadata[i] = meta;
-	}
-	return 0;
+	return (unsigned long)sys_call_table[nr];
 }
-arch_initcall(arch_init_ftrace_syscalls);
 #endif
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 07ced89740d7..f8bcaefd7d34 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -74,9 +74,10 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
 static unsigned long long *facilities;
 
 /* Section: not file related */
-void kvm_arch_hardware_enable(void *garbage)
+int kvm_arch_hardware_enable(void *garbage)
 {
 	/* every s390 is virtualization enabled ;-) */
+	return 0;
 }
 
 void kvm_arch_hardware_disable(void *garbage)
@@ -116,10 +117,16 @@ long kvm_arch_dev_ioctl(struct file *filp,
 
 int kvm_dev_ioctl_check_extension(long ext)
 {
+	int r;
+
 	switch (ext) {
+	case KVM_CAP_S390_PSW:
+		r = 1;
+		break;
 	default:
-		return 0;
+		r = 0;
 	}
+	return r;
 }
 
 /* Section: vm related */
@@ -150,7 +157,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
 		break;
 	}
 	default:
-		r = -EINVAL;
+		r = -ENOTTY;
 	}
 
 	return r;
@@ -419,8 +426,10 @@ static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
 	vcpu_load(vcpu);
 	if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING)
 		rc = -EBUSY;
-	else
-		vcpu->arch.sie_block->gpsw = psw;
+	else {
+		vcpu->run->psw_mask = psw.mask;
+		vcpu->run->psw_addr = psw.addr;
+	}
 	vcpu_put(vcpu);
 	return rc;
 }
@@ -508,9 +517,6 @@ rerun_vcpu:
 
 	switch (kvm_run->exit_reason) {
 	case KVM_EXIT_S390_SIEIC:
-		vcpu->arch.sie_block->gpsw.mask = kvm_run->s390_sieic.mask;
-		vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr;
-		break;
 	case KVM_EXIT_UNKNOWN:
 	case KVM_EXIT_INTR:
 	case KVM_EXIT_S390_RESET:
@@ -519,6 +525,9 @@ rerun_vcpu:
 		BUG();
 	}
 
+	vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
+	vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
+
 	might_fault();
 
 	do {
@@ -538,8 +547,6 @@ rerun_vcpu:
 		/* intercept cannot be handled in-kernel, prepare kvm-run */
 		kvm_run->exit_reason         = KVM_EXIT_S390_SIEIC;
 		kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
-		kvm_run->s390_sieic.mask     = vcpu->arch.sie_block->gpsw.mask;
-		kvm_run->s390_sieic.addr     = vcpu->arch.sie_block->gpsw.addr;
 		kvm_run->s390_sieic.ipa      = vcpu->arch.sie_block->ipa;
 		kvm_run->s390_sieic.ipb      = vcpu->arch.sie_block->ipb;
 		rc = 0;
@@ -551,6 +558,9 @@ rerun_vcpu:
 		rc = 0;
 	}
 
+	kvm_run->psw_mask     = vcpu->arch.sie_block->gpsw.mask;
+	kvm_run->psw_addr     = vcpu->arch.sie_block->gpsw.addr;
+
 	if (vcpu->sigset_active)
 		sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
index 40c8c6748cfe..15ee1111de58 100644
--- a/arch/s390/kvm/sigp.c
+++ b/arch/s390/kvm/sigp.c
@@ -188,9 +188,9 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
 
 	/* make sure that the new value is valid memory */
 	address = address & 0x7fffe000u;
-	if ((copy_from_guest(vcpu, &tmp,
-		(u64) (address + vcpu->arch.sie_block->gmsor) , 1)) ||
-	   (copy_from_guest(vcpu, &tmp, (u64) (address +
+	if ((copy_from_user(&tmp, (void __user *)
+		(address + vcpu->arch.sie_block->gmsor) , 1)) ||
+	   (copy_from_user(&tmp, (void __user *)(address +
 			vcpu->arch.sie_block->gmsor + PAGE_SIZE), 1))) {
 		*reg |= SIGP_STAT_INVALID_PARAMETER;
 		return 1; /* invalid parameter */
diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c
index b201135cc18c..ff58779bf7e9 100644
--- a/arch/s390/mm/cmm.c
+++ b/arch/s390/mm/cmm.c
@@ -343,30 +343,29 @@ static struct ctl_table cmm_table[] = {
 	{
 		.procname	= "cmm_pages",
 		.mode		= 0644,
-		.proc_handler	= &cmm_pages_handler,
+		.proc_handler	= cmm_pages_handler,
 	},
 	{
 		.procname	= "cmm_timed_pages",
 		.mode		= 0644,
-		.proc_handler	= &cmm_pages_handler,
+		.proc_handler	= cmm_pages_handler,
 	},
 	{
 		.procname	= "cmm_timeout",
 		.mode		= 0644,
-		.proc_handler	= &cmm_timeout_handler,
+		.proc_handler	= cmm_timeout_handler,
 	},
-	{ .ctl_name = 0 }
+	{ }
 };
 
 static struct ctl_table cmm_dir_table[] = {
 	{
-		.ctl_name	= CTL_VM,
 		.procname	= "vm",
 		.maxlen		= 0,
 		.mode		= 0555,
 		.child		= cmm_table,
 	},
-	{ .ctl_name = 0 }
+	{ }
 };
 #endif