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

Pull s390 updates from Martin Schwidefsky:
 "The main new feature is machine support for System zEC12 including
  transactional memory, runtime instrumentation, support for scm block
  devices via eadm subchannels, and support for CEX4 crypto cards.

  In addition there are some nice improvements: bpf jit compiler, arch
  backend for cmpxchg_double, relative exception table entries, dasd
  partition detection independent from the dasd driver ioctls, and cpu
  cache information in /proc/cpuinfo and /sys/device/cpu.

  And last but not least a series of cleanup patches from Heiko."

Fix up trivial add-add conflict in arch/s390/Kconfig due to commit
b952741c8079 ("cputime: Generalize CONFIG_VIRT_CPU_ACCOUNTING")

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (76 commits)
  s390: update defconfig
  s390/jump label,nss: let shared kernel support depend on !JUMP_LABEL
  s390/disassembler: fix decoding of risblg instruction
  s390/bpf,jit: add support for BPF_S_ANC_ALU_XOR_X instruction
  s390/traps: move call to print_modules() out of show_regs()
  s390/mm: mark free_initrd_mem() as __init
  s390/dasd: check count address during online setting
  drivers/s390/char/monreader.c: fix error return code
  s390/cmpxchg,percpu: implement cmpxchg_double()
  s390/percpu: implement this_cpu_add_return()
  s390/percpu: implement this_cpu_xchg()
  s390/kexec: remove CONFIG_KEXEC
  s390/irq: use designated initializers for irq class array
  s390: add uninitialized_var() to suppress false positive compiler warnings
  s390/crashdump: move fill_cpu_elf_notes() prototype to header file
  s390/process: add missing header include
  s390/ptrace: add missing ifdef
  s390/ipl,decrompressor: disable branch profiling
  s390/perf_events: compile only for CONFIG_64BIT
  s390/tape: remove even more tape block leftovers
  ...

1 files changed, 28 insertions, 18 deletions

diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 720fda1620f2..ea431e551c6b 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -66,7 +66,7 @@ struct pcpu {
 	unsigned long panic_stack;	/* panic stack for the cpu */
 	unsigned long ec_mask;		/* bit mask for ec_xxx functions */
 	int state;			/* physical cpu state */
-	u32 status;			/* last status received via sigp */
+	int polarization;		/* physical polarization */
 	u16 address;			/* physical cpu address */
 };
 
@@ -74,6 +74,10 @@ static u8 boot_cpu_type;
 static u16 boot_cpu_address;
 static struct pcpu pcpu_devices[NR_CPUS];
 
+/*
+ * The smp_cpu_state_mutex must be held when changing the state or polarization
+ * member of a pcpu data structure within the pcpu_devices arreay.
+ */
 DEFINE_MUTEX(smp_cpu_state_mutex);
 
 /*
@@ -99,7 +103,7 @@ static inline int __pcpu_sigp_relax(u16 addr, u8 order, u32 parm, u32 *status)
 	int cc;
 
 	while (1) {
-		cc = __pcpu_sigp(addr, order, parm, status);
+		cc = __pcpu_sigp(addr, order, parm, NULL);
 		if (cc != SIGP_CC_BUSY)
 			return cc;
 		cpu_relax();
@@ -111,7 +115,7 @@ static int pcpu_sigp_retry(struct pcpu *pcpu, u8 order, u32 parm)
 	int cc, retry;
 
 	for (retry = 0; ; retry++) {
-		cc = __pcpu_sigp(pcpu->address, order, parm, &pcpu->status);
+		cc = __pcpu_sigp(pcpu->address, order, parm, NULL);
 		if (cc != SIGP_CC_BUSY)
 			break;
 		if (retry >= 3)
@@ -122,16 +126,18 @@ static int pcpu_sigp_retry(struct pcpu *pcpu, u8 order, u32 parm)
 
 static inline int pcpu_stopped(struct pcpu *pcpu)
 {
+	u32 uninitialized_var(status);
+
 	if (__pcpu_sigp(pcpu->address, SIGP_SENSE,
-			0, &pcpu->status) != SIGP_CC_STATUS_STORED)
+			0, &status) != SIGP_CC_STATUS_STORED)
 		return 0;
-	return !!(pcpu->status & (SIGP_STATUS_CHECK_STOP|SIGP_STATUS_STOPPED));
+	return !!(status & (SIGP_STATUS_CHECK_STOP|SIGP_STATUS_STOPPED));
 }
 
 static inline int pcpu_running(struct pcpu *pcpu)
 {
 	if (__pcpu_sigp(pcpu->address, SIGP_SENSE_RUNNING,
-			0, &pcpu->status) != SIGP_CC_STATUS_STORED)
+			0, NULL) != SIGP_CC_STATUS_STORED)
 		return 1;
 	/* Status stored condition code is equivalent to cpu not running. */
 	return 0;
@@ -586,6 +592,16 @@ static inline void smp_get_save_area(int cpu, u16 address) { }
 
 #endif /* CONFIG_ZFCPDUMP || CONFIG_CRASH_DUMP */
 
+void smp_cpu_set_polarization(int cpu, int val)
+{
+	pcpu_devices[cpu].polarization = val;
+}
+
+int smp_cpu_get_polarization(int cpu)
+{
+	return pcpu_devices[cpu].polarization;
+}
+
 static struct sclp_cpu_info *smp_get_cpu_info(void)
 {
 	static int use_sigp_detection;
@@ -628,7 +644,7 @@ static int __devinit __smp_rescan_cpus(struct sclp_cpu_info *info,
 		pcpu->address = info->cpu[i].address;
 		pcpu->state = (cpu >= info->configured) ?
 			CPU_STATE_STANDBY : CPU_STATE_CONFIGURED;
-		cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+		smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
 		set_cpu_present(cpu, true);
 		if (sysfs_add && smp_add_present_cpu(cpu) != 0)
 			set_cpu_present(cpu, false);
@@ -796,7 +812,7 @@ void __init smp_prepare_boot_cpu(void)
 	pcpu->async_stack = S390_lowcore.async_stack - ASYNC_SIZE;
 	pcpu->panic_stack = S390_lowcore.panic_stack - PAGE_SIZE;
 	S390_lowcore.percpu_offset = __per_cpu_offset[0];
-	cpu_set_polarization(0, POLARIZATION_UNKNOWN);
+	smp_cpu_set_polarization(0, POLARIZATION_UNKNOWN);
 	set_cpu_present(0, true);
 	set_cpu_online(0, true);
 }
@@ -862,7 +878,7 @@ static ssize_t cpu_configure_store(struct device *dev,
 		if (rc)
 			break;
 		pcpu->state = CPU_STATE_STANDBY;
-		cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+		smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
 		topology_expect_change();
 		break;
 	case 1:
@@ -872,7 +888,7 @@ static ssize_t cpu_configure_store(struct device *dev,
 		if (rc)
 			break;
 		pcpu->state = CPU_STATE_CONFIGURED;
-		cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
+		smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
 		topology_expect_change();
 		break;
 	default:
@@ -959,23 +975,17 @@ static int __cpuinit smp_cpu_notify(struct notifier_block *self,
 	struct device *s = &c->dev;
 	int err = 0;
 
-	switch (action) {
+	switch (action & ~CPU_TASKS_FROZEN) {
 	case CPU_ONLINE:
-	case CPU_ONLINE_FROZEN:
 		err = sysfs_create_group(&s->kobj, &cpu_online_attr_group);
 		break;
 	case CPU_DEAD:
-	case CPU_DEAD_FROZEN:
 		sysfs_remove_group(&s->kobj, &cpu_online_attr_group);
 		break;
 	}
 	return notifier_from_errno(err);
 }
 
-static struct notifier_block __cpuinitdata smp_cpu_nb = {
-	.notifier_call = smp_cpu_notify,
-};
-
 static int __devinit smp_add_present_cpu(int cpu)
 {
 	struct cpu *c = &pcpu_devices[cpu].cpu;
@@ -1050,7 +1060,7 @@ static int __init s390_smp_init(void)
 {
 	int cpu, rc;
 
-	register_cpu_notifier(&smp_cpu_nb);
+	hotcpu_notifier(smp_cpu_notify, 0);
 #ifdef CONFIG_HOTPLUG_CPU
 	rc = device_create_file(cpu_subsys.dev_root, &dev_attr_rescan);
 	if (rc)