5 files changed, 88 insertions, 34 deletions

diff --git a/arch/s390/include/asm/dma.h b/arch/s390/include/asm/dma.h
index de015d85e3e5..bb9bdcd20864 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 16c3eb164f4f..27cb32185ce1 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 e6972f85d2b0..7def77302d63 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 c928dc1938f2..c1d7930a82f4 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1387,10 +1387,7 @@ 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 fba4d66788a2..4c060bb5b8ea 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