26 files changed, 223 insertions, 143 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index b5ea38c2564..c15ba7d1be6 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -78,7 +78,6 @@ config S390
 	select HAVE_KVM if 64BIT
 	select HAVE_ARCH_TRACEHOOK
 	select INIT_ALL_POSSIBLE
-	select HAVE_IRQ_WORK
 	select HAVE_PERF_EVENTS
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select HAVE_DEBUG_KMEMLEAK
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 4b8e08b56f4..7e3ce78d429 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -24,8 +24,8 @@ CHECKFLAGS	+= -D__s390__ -msize-long
 else
 LD_BFD		:= elf64-s390
 LDFLAGS		:= -m elf64_s390
-KBUILD_AFLAGS_MODULE += -fpic -D__PIC__
-KBUILD_CFLAGS_MODULE += -fpic -D__PIC__
+KBUILD_AFLAGS_MODULE += -fPIC
+KBUILD_CFLAGS_MODULE += -fPIC
 KBUILD_CFLAGS	+= -m64
 KBUILD_AFLAGS	+= -m64
 UTS_MACHINE	:= s390x
diff --git a/arch/s390/include/asm/dma.h b/arch/s390/include/asm/dma.h
index de015d85e3e..bb9bdcd2086 100644
--- a/arch/s390/include/asm/dma.h
+++ b/arch/s390/include/asm/dma.h
@@ -10,4 +10,10 @@
  */
 #define MAX_DMA_ADDRESS         0x80000000
 
+#ifdef CONFIG_PCI
+extern int isa_dma_bridge_buggy;
+#else
+#define isa_dma_bridge_buggy	(0)
+#endif
+
 #endif /* _ASM_S390_DMA_H */
diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
index 16c3eb164f4..27cb32185ce 100644
--- a/arch/s390/include/asm/io.h
+++ b/arch/s390/include/asm/io.h
@@ -85,6 +85,11 @@ static inline void iounmap(volatile void __iomem *addr)
 #define __raw_writel	zpci_write_u32
 #define __raw_writeq	zpci_write_u64
 
+#define readb_relaxed	readb
+#define readw_relaxed	readw
+#define readl_relaxed	readl
+#define readq_relaxed	readq
+
 #endif /* CONFIG_PCI */
 
 #include <asm-generic/io.h>
diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index e6972f85d2b..7def77302d6 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -2,43 +2,61 @@
 #define _ASM_IRQ_H
 
 #include <linux/hardirq.h>
+#include <linux/percpu.h>
+#include <linux/cache.h>
 #include <linux/types.h>
 
-enum interruption_class {
+enum interruption_main_class {
 	EXTERNAL_INTERRUPT,
 	IO_INTERRUPT,
-	EXTINT_CLK,
-	EXTINT_EXC,
-	EXTINT_EMS,
-	EXTINT_TMR,
-	EXTINT_TLA,
-	EXTINT_PFL,
-	EXTINT_DSD,
-	EXTINT_VRT,
-	EXTINT_SCP,
-	EXTINT_IUC,
-	EXTINT_CMS,
-	EXTINT_CMC,
-	EXTINT_CMR,
-	IOINT_CIO,
-	IOINT_QAI,
-	IOINT_DAS,
-	IOINT_C15,
-	IOINT_C70,
-	IOINT_TAP,
-	IOINT_VMR,
-	IOINT_LCS,
-	IOINT_CLW,
-	IOINT_CTC,
-	IOINT_APB,
-	IOINT_ADM,
-	IOINT_CSC,
-	IOINT_PCI,
-	IOINT_MSI,
+	NR_IRQS
+};
+
+enum interruption_class {
+	IRQEXT_CLK,
+	IRQEXT_EXC,
+	IRQEXT_EMS,
+	IRQEXT_TMR,
+	IRQEXT_TLA,
+	IRQEXT_PFL,
+	IRQEXT_DSD,
+	IRQEXT_VRT,
+	IRQEXT_SCP,
+	IRQEXT_IUC,
+	IRQEXT_CMS,
+	IRQEXT_CMC,
+	IRQEXT_CMR,
+	IRQIO_CIO,
+	IRQIO_QAI,
+	IRQIO_DAS,
+	IRQIO_C15,
+	IRQIO_C70,
+	IRQIO_TAP,
+	IRQIO_VMR,
+	IRQIO_LCS,
+	IRQIO_CLW,
+	IRQIO_CTC,
+	IRQIO_APB,
+	IRQIO_ADM,
+	IRQIO_CSC,
+	IRQIO_PCI,
+	IRQIO_MSI,
 	NMI_NMI,
-	NR_IRQS,
+	CPU_RST,
+	NR_ARCH_IRQS
 };
 
+struct irq_stat {
+	unsigned int irqs[NR_ARCH_IRQS];
+};
+
+DECLARE_PER_CPU_SHARED_ALIGNED(struct irq_stat, irq_stat);
+
+static __always_inline void inc_irq_stat(enum interruption_class irq)
+{
+	__get_cpu_var(irq_stat).irqs[irq]++;
+}
+
 struct ext_code {
 	unsigned short subcode;
 	unsigned short code;
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index c928dc1938f..098adbb6266 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1365,6 +1365,18 @@ static inline void pmdp_invalidate(struct vm_area_struct *vma,
 	__pmd_idte(address, pmdp);
 }
 
+#define __HAVE_ARCH_PMDP_SET_WRPROTECT
+static inline void pmdp_set_wrprotect(struct mm_struct *mm,
+				      unsigned long address, pmd_t *pmdp)
+{
+	pmd_t pmd = *pmdp;
+
+	if (pmd_write(pmd)) {
+		__pmd_idte(address, pmdp);
+		set_pmd_at(mm, address, pmdp, pmd_wrprotect(pmd));
+	}
+}
+
 static inline pmd_t mk_pmd_phys(unsigned long physpage, pgprot_t pgprot)
 {
 	pmd_t __pmd;
@@ -1387,10 +1399,7 @@ static inline int has_transparent_hugepage(void)
 
 static inline unsigned long pmd_pfn(pmd_t pmd)
 {
-	if (pmd_trans_huge(pmd))
-		return pmd_val(pmd) >> HPAGE_SHIFT;
-	else
-		return pmd_val(pmd) >> PAGE_SHIFT;
+	return pmd_val(pmd) >> PAGE_SHIFT;
 }
 #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 
diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
index fba4d66788a..4c060bb5b8e 100644
--- a/arch/s390/include/asm/timex.h
+++ b/arch/s390/include/asm/timex.h
@@ -128,4 +128,32 @@ static inline unsigned long long get_clock_monotonic(void)
 	return get_clock_xt() - sched_clock_base_cc;
 }
 
+/**
+ * tod_to_ns - convert a TOD format value to nanoseconds
+ * @todval: to be converted TOD format value
+ * Returns: number of nanoseconds that correspond to the TOD format value
+ *
+ * Converting a 64 Bit TOD format value to nanoseconds means that the value
+ * must be divided by 4.096. In order to achieve that we multiply with 125
+ * and divide by 512:
+ *
+ *    ns = (todval * 125) >> 9;
+ *
+ * In order to avoid an overflow with the multiplication we can rewrite this.
+ * With a split todval == 2^32 * th + tl (th upper 32 bits, tl lower 32 bits)
+ * we end up with
+ *
+ *    ns = ((2^32 * th + tl) * 125 ) >> 9;
+ * -> ns = (2^23 * th * 125) + ((tl * 125) >> 9);
+ *
+ */
+static inline unsigned long long tod_to_ns(unsigned long long todval)
+{
+	unsigned long long ns;
+
+	ns = ((todval >> 32) << 23) * 125;
+	ns += ((todval & 0xffffffff) * 125) >> 9;
+	return ns;
+}
+
 #endif
diff --git a/arch/s390/include/uapi/asm/unistd.h b/arch/s390/include/uapi/asm/unistd.h
index 63e6078699f..864f693c237 100644
--- a/arch/s390/include/uapi/asm/unistd.h
+++ b/arch/s390/include/uapi/asm/unistd.h
@@ -279,7 +279,8 @@
 #define __NR_process_vm_writev	341
 #define __NR_s390_runtime_instr 342
 #define __NR_kcmp		343
-#define NR_syscalls 344
+#define __NR_finit_module	344
+#define NR_syscalls 345
 
 /* 
  * There are some system calls that are not present on 64 bit, some
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 827e094a2f4..9b9a805656b 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1659,3 +1659,9 @@ ENTRY(sys_kcmp_wrapper)
 	llgfr	%r5,%r5			# unsigned long
 	llgfr	%r6,%r6			# unsigned long
 	jg	sys_kcmp
+
+ENTRY(sys_finit_module_wrapper)
+	lgfr	%r2,%r2			# int
+	llgtr	%r3,%r3			# const char __user *
+	lgfr	%r4,%r4			# int
+	jg	sys_finit_module
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index ba500d8dc39..4e8215e0d4b 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -1127,13 +1127,14 @@ debug_register_view(debug_info_t * id, struct debug_view *view)
 	if (i == DEBUG_MAX_VIEWS) {
 		pr_err("Registering view %s/%s would exceed the maximum "
 		       "number of views %i\n", id->name, view->name, i);
-		debugfs_remove(pde);
 		rc = -1;
 	} else {
 		id->views[i] = view;
 		id->debugfs_entries[i] = pde;
 	}
 	spin_unlock_irqrestore(&id->lock, flags);
+	if (rc)
+		debugfs_remove(pde);
 out:
 	return rc;
 }
@@ -1146,9 +1147,9 @@ EXPORT_SYMBOL(debug_register_view);
 int
 debug_unregister_view(debug_info_t * id, struct debug_view *view)
 {
-	int rc = 0;
-	int i;
+	struct dentry *dentry = NULL;
 	unsigned long flags;
+	int i, rc = 0;
 
 	if (!id)
 		goto out;
@@ -1160,10 +1161,12 @@ debug_unregister_view(debug_info_t * id, struct debug_view *view)
 	if (i == DEBUG_MAX_VIEWS)
 		rc = -1;
 	else {
-		debugfs_remove(id->debugfs_entries[i]);
+		dentry = id->debugfs_entries[i];
 		id->views[i] = NULL;
+		id->debugfs_entries[i] = NULL;
 	}
 	spin_unlock_irqrestore(&id->lock, flags);
+	debugfs_remove(dentry);
 out:
 	return rc;
 }
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index bf24293970c..9df824ea166 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -24,43 +24,65 @@
 #include <asm/irq.h>
 #include "entry.h"
 
+DEFINE_PER_CPU_SHARED_ALIGNED(struct irq_stat, irq_stat);
+EXPORT_PER_CPU_SYMBOL_GPL(irq_stat);
+
 struct irq_class {
 	char *name;
 	char *desc;
 };
 
-static const struct irq_class intrclass_names[] = {
+/*
+ * The list of "main" irq classes on s390. This is the list of interrrupts
+ * that appear both in /proc/stat ("intr" line) and /proc/interrupts.
+ * Historically only external and I/O interrupts have been part of /proc/stat.
+ * We can't add the split external and I/O sub classes since the first field
+ * in the "intr" line in /proc/stat is supposed to be the sum of all other
+ * fields.
+ * Since the external and I/O interrupt fields are already sums we would end
+ * up with having a sum which accounts each interrupt twice.
+ */
+static const struct irq_class irqclass_main_desc[NR_IRQS] = {
 	[EXTERNAL_INTERRUPT] = {.name = "EXT"},
-	[IO_INTERRUPT]	     = {.name = "I/O"},
-	[EXTINT_CLK] = {.name = "CLK", .desc = "[EXT] Clock Comparator"},
-	[EXTINT_EXC] = {.name = "EXC", .desc = "[EXT] External Call"},
-	[EXTINT_EMS] = {.name = "EMS", .desc = "[EXT] Emergency Signal"},
-	[EXTINT_TMR] = {.name = "TMR", .desc = "[EXT] CPU Timer"},
-	[EXTINT_TLA] = {.name = "TAL", .desc = "[EXT] Timing Alert"},
-	[EXTINT_PFL] = {.name = "PFL", .desc = "[EXT] Pseudo Page Fault"},
-	[EXTINT_DSD] = {.name = "DSD", .desc = "[EXT] DASD Diag"},
-	[EXTINT_VRT] = {.name = "VRT", .desc = "[EXT] Virtio"},
-	[EXTINT_SCP] = {.name = "SCP", .desc = "[EXT] Service Call"},
-	[EXTINT_IUC] = {.name = "IUC", .desc = "[EXT] IUCV"},
-	[EXTINT_CMS] = {.name = "CMS", .desc = "[EXT] CPU-Measurement: Sampling"},
-	[EXTINT_CMC] = {.name = "CMC", .desc = "[EXT] CPU-Measurement: Counter"},
-	[EXTINT_CMR] = {.name = "CMR", .desc = "[EXT] CPU-Measurement: RI"},
-	[IOINT_CIO]  = {.name = "CIO", .desc = "[I/O] Common I/O Layer Interrupt"},
-	[IOINT_QAI]  = {.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt"},
-	[IOINT_DAS]  = {.name = "DAS", .desc = "[I/O] DASD"},
-	[IOINT_C15]  = {.name = "C15", .desc = "[I/O] 3215"},
-	[IOINT_C70]  = {.name = "C70", .desc = "[I/O] 3270"},
-	[IOINT_TAP]  = {.name = "TAP", .desc = "[I/O] Tape"},
-	[IOINT_VMR]  = {.name = "VMR", .desc = "[I/O] Unit Record Devices"},
-	[IOINT_LCS]  = {.name = "LCS", .desc = "[I/O] LCS"},
-	[IOINT_CLW]  = {.name = "CLW", .desc = "[I/O] CLAW"},
-	[IOINT_CTC]  = {.name = "CTC", .desc = "[I/O] CTC"},
-	[IOINT_APB]  = {.name = "APB", .desc = "[I/O] AP Bus"},
-	[IOINT_ADM]  = {.name = "ADM", .desc = "[I/O] EADM Subchannel"},
-	[IOINT_CSC]  = {.name = "CSC", .desc = "[I/O] CHSC Subchannel"},
-	[IOINT_PCI]  = {.name = "PCI", .desc = "[I/O] PCI Interrupt" },
-	[IOINT_MSI] =  {.name = "MSI", .desc = "[I/O] MSI Interrupt" },
+	[IO_INTERRUPT]	     = {.name = "I/O"}
+};
+
+/*
+ * The list of split external and I/O interrupts that appear only in
+ * /proc/interrupts.
+ * In addition this list contains non external / I/O events like NMIs.
+ */
+static const struct irq_class irqclass_sub_desc[NR_ARCH_IRQS] = {
+	[IRQEXT_CLK] = {.name = "CLK", .desc = "[EXT] Clock Comparator"},
+	[IRQEXT_EXC] = {.name = "EXC", .desc = "[EXT] External Call"},
+	[IRQEXT_EMS] = {.name = "EMS", .desc = "[EXT] Emergency Signal"},
+	[IRQEXT_TMR] = {.name = "TMR", .desc = "[EXT] CPU Timer"},
+	[IRQEXT_TLA] = {.name = "TAL", .desc = "[EXT] Timing Alert"},
+	[IRQEXT_PFL] = {.name = "PFL", .desc = "[EXT] Pseudo Page Fault"},
+	[IRQEXT_DSD] = {.name = "DSD", .desc = "[EXT] DASD Diag"},
+	[IRQEXT_VRT] = {.name = "VRT", .desc = "[EXT] Virtio"},
+	[IRQEXT_SCP] = {.name = "SCP", .desc = "[EXT] Service Call"},
+	[IRQEXT_IUC] = {.name = "IUC", .desc = "[EXT] IUCV"},
+	[IRQEXT_CMS] = {.name = "CMS", .desc = "[EXT] CPU-Measurement: Sampling"},
+	[IRQEXT_CMC] = {.name = "CMC", .desc = "[EXT] CPU-Measurement: Counter"},
+	[IRQEXT_CMR] = {.name = "CMR", .desc = "[EXT] CPU-Measurement: RI"},
+	[IRQIO_CIO]  = {.name = "CIO", .desc = "[I/O] Common I/O Layer Interrupt"},
+	[IRQIO_QAI]  = {.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt"},
+	[IRQIO_DAS]  = {.name = "DAS", .desc = "[I/O] DASD"},
+	[IRQIO_C15]  = {.name = "C15", .desc = "[I/O] 3215"},
+	[IRQIO_C70]  = {.name = "C70", .desc = "[I/O] 3270"},
+	[IRQIO_TAP]  = {.name = "TAP", .desc = "[I/O] Tape"},
+	[IRQIO_VMR]  = {.name = "VMR", .desc = "[I/O] Unit Record Devices"},
+	[IRQIO_LCS]  = {.name = "LCS", .desc = "[I/O] LCS"},
+	[IRQIO_CLW]  = {.name = "CLW", .desc = "[I/O] CLAW"},
+	[IRQIO_CTC]  = {.name = "CTC", .desc = "[I/O] CTC"},
+	[IRQIO_APB]  = {.name = "APB", .desc = "[I/O] AP Bus"},
+	[IRQIO_ADM]  = {.name = "ADM", .desc = "[I/O] EADM Subchannel"},
+	[IRQIO_CSC]  = {.name = "CSC", .desc = "[I/O] CHSC Subchannel"},
+	[IRQIO_PCI]  = {.name = "PCI", .desc = "[I/O] PCI Interrupt" },
+	[IRQIO_MSI]  = {.name = "MSI", .desc = "[I/O] MSI Interrupt" },
 	[NMI_NMI]    = {.name = "NMI", .desc = "[NMI] Machine Check"},
+	[CPU_RST]    = {.name = "RST", .desc = "[CPU] CPU Restart"},
 };
 
 /*
@@ -68,30 +90,34 @@ static const struct irq_class intrclass_names[] = {
  */
 int show_interrupts(struct seq_file *p, void *v)
 {
-	int i = *(loff_t *) v, j;
+	int irq = *(loff_t *) v;
+	int cpu;
 
 	get_online_cpus();
-	if (i == 0) {
+	if (irq == 0) {
 		seq_puts(p, "           ");
-		for_each_online_cpu(j)
-			seq_printf(p, "CPU%d       ",j);
+		for_each_online_cpu(cpu)
+			seq_printf(p, "CPU%d       ", cpu);
 		seq_putc(p, '\n');
 	}
-
-	if (i < NR_IRQS) {
-		seq_printf(p, "%s: ", intrclass_names[i].name);
-#ifndef CONFIG_SMP
-		seq_printf(p, "%10u ", kstat_irqs(i));
-#else
-		for_each_online_cpu(j)
-			seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
-#endif
-		if (intrclass_names[i].desc)
-			seq_printf(p, "  %s", intrclass_names[i].desc);
-                seq_putc(p, '\n');
-        }
+	if (irq < NR_IRQS) {
+		seq_printf(p, "%s: ", irqclass_main_desc[irq].name);
+		for_each_online_cpu(cpu)
+			seq_printf(p, "%10u ", kstat_cpu(cpu).irqs[irq]);
+		seq_putc(p, '\n');
+		goto skip_arch_irqs;
+	}
+	for (irq = 0; irq < NR_ARCH_IRQS; irq++) {
+		seq_printf(p, "%s: ", irqclass_sub_desc[irq].name);
+		for_each_online_cpu(cpu)
+			seq_printf(p, "%10u ", per_cpu(irq_stat, cpu).irqs[irq]);
+		if (irqclass_sub_desc[irq].desc)
+			seq_printf(p, "  %s", irqclass_sub_desc[irq].desc);
+		seq_putc(p, '\n');
+	}
+skip_arch_irqs:
 	put_online_cpus();
-        return 0;
+	return 0;
 }
 
 /*
@@ -222,7 +248,7 @@ void __irq_entry do_extint(struct pt_regs *regs, struct ext_code ext_code,
 		/* Serve timer interrupts first. */
 		clock_comparator_work();
 	}
-	kstat_cpu(smp_processor_id()).irqs[EXTERNAL_INTERRUPT]++;
+	kstat_incr_irqs_this_cpu(EXTERNAL_INTERRUPT, NULL);
 	if (ext_code.code != 0x1004)
 		__get_cpu_var(s390_idle).nohz_delay = 1;
 
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index a6daa5c5cdb..7918fbea36b 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -254,7 +254,7 @@ void notrace s390_do_machine_check(struct pt_regs *regs)
 	int umode;
 
 	nmi_enter();
-	kstat_cpu(smp_processor_id()).irqs[NMI_NMI]++;
+	inc_irq_stat(NMI_NMI);
 	mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
 	mcck = &__get_cpu_var(cpu_mcck);
 	umode = user_mode(regs);
diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index c4e7269d4a0..86ec7447e1f 100644
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -229,7 +229,7 @@ static void cpumf_measurement_alert(struct ext_code ext_code,
 	if (!(alert & CPU_MF_INT_CF_MASK))
 		return;
 
-	kstat_cpu(smp_processor_id()).irqs[EXTINT_CMC]++;
+	inc_irq_stat(IRQEXT_CMC);
 	cpuhw = &__get_cpu_var(cpu_hw_events);
 
 	/* Measurement alerts are shared and might happen when the PMU
diff --git a/arch/s390/kernel/runtime_instr.c b/arch/s390/kernel/runtime_instr.c
index 61066f6f71a..077a99389b0 100644
--- a/arch/s390/kernel/runtime_instr.c
+++ b/arch/s390/kernel/runtime_instr.c
@@ -71,7 +71,7 @@ static void runtime_instr_int_handler(struct ext_code ext_code,
 	if (!(param32 & CPU_MF_INT_RI_MASK))
 		return;
 
-	kstat_cpu(smp_processor_id()).irqs[EXTINT_CMR]++;
+	inc_irq_stat(IRQEXT_CMR);
 
 	if (!current->thread.ri_cb)
 		return;
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 2568590973a..a5360de85ec 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -16,7 +16,7 @@
 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 
 #include <linux/errno.h>
-#include <linux/module.h>
+#include <linux/export.h>
 #include <linux/sched.h>
 #include <linux/kernel.h>
 #include <linux/memblock.h>
@@ -289,6 +289,7 @@ void machine_power_off(void)
  * Dummy power off function.
  */
 void (*pm_power_off)(void) = machine_power_off;
+EXPORT_SYMBOL_GPL(pm_power_off);
 
 static int __init early_parse_mem(char *p)
 {
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index ea431e551c6..7433a2f9e5c 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -433,9 +433,9 @@ static void do_ext_call_interrupt(struct ext_code ext_code,
 
 	cpu = smp_processor_id();
 	if (ext_code.code == 0x1202)
-		kstat_cpu(cpu).irqs[EXTINT_EXC]++;
+		inc_irq_stat(IRQEXT_EXC);
 	else
-		kstat_cpu(cpu).irqs[EXTINT_EMS]++;
+		inc_irq_stat(IRQEXT_EMS);
 	/*
 	 * handle bit signal external calls
 	 */
@@ -623,9 +623,9 @@ static struct sclp_cpu_info *smp_get_cpu_info(void)
 	return info;
 }
 
-static int __devinit smp_add_present_cpu(int cpu);
+static int __cpuinit smp_add_present_cpu(int cpu);
 
-static int __devinit __smp_rescan_cpus(struct sclp_cpu_info *info,
+static int __cpuinit __smp_rescan_cpus(struct sclp_cpu_info *info,
 				       int sysfs_add)
 {
 	struct pcpu *pcpu;
@@ -709,6 +709,7 @@ static void __cpuinit smp_start_secondary(void *cpuvoid)
 	pfault_init();
 	notify_cpu_starting(smp_processor_id());
 	set_cpu_online(smp_processor_id(), true);
+	inc_irq_stat(CPU_RST);
 	local_irq_enable();
 	/* cpu_idle will call schedule for us */
 	cpu_idle();
@@ -986,7 +987,7 @@ static int __cpuinit smp_cpu_notify(struct notifier_block *self,
 	return notifier_from_errno(err);
 }
 
-static int __devinit smp_add_present_cpu(int cpu)
+static int __cpuinit smp_add_present_cpu(int cpu)
 {
 	struct cpu *c = &pcpu_devices[cpu].cpu;
 	struct device *s = &c->dev;
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 48174850f3b..6a6c61f94dd 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -352,3 +352,4 @@ SYSCALL(sys_process_vm_readv,sys_process_vm_readv,compat_sys_process_vm_readv_wr
 SYSCALL(sys_process_vm_writev,sys_process_vm_writev,compat_sys_process_vm_writev_wrapper)
 SYSCALL(sys_ni_syscall,sys_s390_runtime_instr,sys_s390_runtime_instr_wrapper)
 SYSCALL(sys_kcmp,sys_kcmp,sys_kcmp_wrapper)
+SYSCALL(sys_finit_module,sys_finit_module,sys_finit_module_wrapper)
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 7fcd690d42c..0aa98db8a80 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -63,7 +63,7 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators);
  */
 unsigned long long notrace __kprobes sched_clock(void)
 {
-	return (get_clock_monotonic() * 125) >> 9;
+	return tod_to_ns(get_clock_monotonic());
 }
 
 /*
@@ -120,6 +120,9 @@ static int s390_next_ktime(ktime_t expires,
 	nsecs = ktime_to_ns(ktime_add(timespec_to_ktime(ts), expires));
 	do_div(nsecs, 125);
 	S390_lowcore.clock_comparator = sched_clock_base_cc + (nsecs << 9);
+	/* Program the maximum value if we have an overflow (== year 2042) */
+	if (unlikely(S390_lowcore.clock_comparator < sched_clock_base_cc))
+		S390_lowcore.clock_comparator = -1ULL;
 	set_clock_comparator(S390_lowcore.clock_comparator);
 	return 0;
 }
@@ -168,7 +171,7 @@ static void clock_comparator_interrupt(struct ext_code ext_code,
 				       unsigned int param32,
 				       unsigned long param64)
 {
-	kstat_cpu(smp_processor_id()).irqs[EXTINT_CLK]++;
+	inc_irq_stat(IRQEXT_CLK);
 	if (S390_lowcore.clock_comparator == -1ULL)
 		set_clock_comparator(S390_lowcore.clock_comparator);
 }
@@ -179,7 +182,7 @@ static void stp_timing_alert(struct stp_irq_parm *);
 static void timing_alert_interrupt(struct ext_code ext_code,
 				   unsigned int param32, unsigned long param64)
 {
-	kstat_cpu(smp_processor_id()).irqs[EXTINT_TLA]++;
+	inc_irq_stat(IRQEXT_TLA);
 	if (param32 & 0x00c40000)
 		etr_timing_alert((struct etr_irq_parm *) &param32);
 	if (param32 & 0x00038000)
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index f1aba87cceb..4b2e3e31700 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -10,6 +10,7 @@
 #include <linux/bootmem.h>
 #include <linux/cpuset.h>
 #include <linux/device.h>
+#include <linux/export.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/init.h>
@@ -42,6 +43,7 @@ static struct mask_info socket_info;
 static struct mask_info book_info;
 
 struct cpu_topology_s390 cpu_topology[NR_CPUS];
+EXPORT_SYMBOL_GPL(cpu_topology);
 
 static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
 {
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index e84b8b68444..ce9cc5aa203 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -127,7 +127,7 @@ void vtime_account_user(struct task_struct *tsk)
  * Update process times based on virtual cpu times stored by entry.S
  * to the lowcore fields user_timer, system_timer & steal_clock.
  */
-void vtime_account(struct task_struct *tsk)
+void vtime_account_irq_enter(struct task_struct *tsk)
 {
 	struct thread_info *ti = task_thread_info(tsk);
 	u64 timer, system;
@@ -145,10 +145,10 @@ void vtime_account(struct task_struct *tsk)
 
 	virt_timer_forward(system);
 }
-EXPORT_SYMBOL_GPL(vtime_account);
+EXPORT_SYMBOL_GPL(vtime_account_irq_enter);
 
 void vtime_account_system(struct task_struct *tsk)
-__attribute__((alias("vtime_account")));
+__attribute__((alias("vtime_account_irq_enter")));
 EXPORT_SYMBOL_GPL(vtime_account_system);
 
 void __kprobes vtime_stop_cpu(void)
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index c30615e605a..82c481ddef7 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -408,7 +408,7 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
 		return 0;
 	}
 
-	sltime = ((vcpu->arch.sie_block->ckc - now)*125)>>9;
+	sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
 
 	hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
 	VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index c9011bfaabb..f090e819bf7 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -613,7 +613,9 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
 		kvm_s390_deliver_pending_interrupts(vcpu);
 
 	vcpu->arch.sie_block->icptcode = 0;
+	preempt_disable();
 	kvm_guest_enter();
+	preempt_enable();
 	VCPU_EVENT(vcpu, 6, "entering sie flags %x",
 		   atomic_read(&vcpu->arch.sie_block->cpuflags));
 	trace_kvm_s390_sie_enter(vcpu,
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 42601d6e166..2fb9e63b8fc 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -569,7 +569,7 @@ static void pfault_interrupt(struct ext_code ext_code,
 	subcode = ext_code.subcode;
 	if ((subcode & 0xff00) != __SUBCODE_MASK)
 		return;
-	kstat_cpu(smp_processor_id()).irqs[EXTINT_PFL]++;
+	inc_irq_stat(IRQEXT_PFL);
 	/* Get the token (= pid of the affected task). */
 	pid = sizeof(void *) == 4 ? param32 : param64;
 	rcu_read_lock();
diff --git a/arch/s390/oprofile/hwsampler.c b/arch/s390/oprofile/hwsampler.c
index 0cb385da202..b5b2916895e 100644
--- a/arch/s390/oprofile/hwsampler.c
+++ b/arch/s390/oprofile/hwsampler.c
@@ -233,7 +233,7 @@ static void hws_ext_handler(struct ext_code ext_code,
 	if (!(param32 & CPU_MF_INT_SF_MASK))
 		return;
 
-	kstat_cpu(smp_processor_id()).irqs[EXTINT_CMS]++;
+	inc_irq_stat(IRQEXT_CMS);
 	atomic_xchg(&cb->ext_params, atomic_read(&cb->ext_params) | param32);
 
 	if (hws_wq)
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 8fa416b8775..60e0372545d 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -160,35 +160,6 @@ int pci_proc_domain(struct pci_bus *bus)
 }
 EXPORT_SYMBOL_GPL(pci_proc_domain);
 
-/* Store PCI function information block */
-static int zpci_store_fib(struct zpci_dev *zdev, u8 *fc)
-{
-	struct zpci_fib *fib;
-	u8 status, cc;
-
-	fib = (void *) get_zeroed_page(GFP_KERNEL);
-	if (!fib)
-		return -ENOMEM;
-
-	do {
-		cc = __stpcifc(zdev->fh, 0, fib, &status);
-		if (cc == 2) {
-			msleep(ZPCI_INSN_BUSY_DELAY);
-			memset(fib, 0, PAGE_SIZE);
-		}
-	} while (cc == 2);
-
-	if (cc)
-		pr_err_once("%s: cc: %u  status: %u\n",
-			    __func__, cc, status);
-
-	/* Return PCI function controls */
-	*fc = fib->fc;
-
-	free_page((unsigned long) fib);
-	return (cc) ? -EIO : 0;
-}
-
 /* Modify PCI: Register adapter interruptions */
 static int zpci_register_airq(struct zpci_dev *zdev, unsigned int aisb,
 			      u64 aibv)
@@ -385,7 +356,7 @@ unsigned int probe_irq_mask(unsigned long val)
 }
 EXPORT_SYMBOL_GPL(probe_irq_mask);
 
-void __devinit pcibios_fixup_bus(struct pci_bus *bus)
+void pcibios_fixup_bus(struct pci_bus *bus)
 {
 }
 
@@ -469,7 +440,7 @@ static void zpci_irq_handler(void *dont, void *need)
 	int rescan = 0, max = aisb_max;
 	struct zdev_irq_map *imap;
 
-	kstat_cpu(smp_processor_id()).irqs[IOINT_PCI]++;
+	inc_irq_stat(IRQIO_PCI);
 	sbit = start;
 
 scan:
@@ -481,7 +452,7 @@ scan:
 		/* find vector bit */
 		imap = bucket->imap[sbit];
 		for_each_set_bit_left(mbit, &imap->aibv, imap->msi_vecs) {
-			kstat_cpu(smp_processor_id()).irqs[IOINT_MSI]++;
+			inc_irq_stat(IRQIO_MSI);
 			clear_bit(63 - mbit, &imap->aibv);
 
 			spin_lock(&imap->lock);
diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c
index 6138468b420..a547419907c 100644
--- a/arch/s390/pci/pci_dma.c
+++ b/arch/s390/pci/pci_dma.c
@@ -13,8 +13,6 @@
 #include <linux/pci.h>
 #include <asm/pci_dma.h>
 
-static enum zpci_ioat_dtype zpci_ioat_dt = ZPCI_IOTA_RTTO;
-
 static struct kmem_cache *dma_region_table_cache;
 static struct kmem_cache *dma_page_table_cache;