6 files changed, 45 insertions, 27 deletions

diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 4b8e08b56f49..7e3ce78d4290 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/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
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index aff0e350d776..a5f4f5a1d24b 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());
 }
 
 /*
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index c30615e605ac..82c481ddef76 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/drivers/s390/cio/chsc.c b/drivers/s390/cio/chsc.c
index 68e80e2734a4..10729bbceced 100644
--- a/drivers/s390/cio/chsc.c
+++ b/drivers/s390/cio/chsc.c
@@ -283,7 +283,7 @@ struct chsc_sei_nt2_area {
         u8  ccdf[PAGE_SIZE - 24 - 56];  /* content-code dependent field */
 } __packed;
 
-#define CHSC_SEI_NT0    0ULL
+#define CHSC_SEI_NT0    (1ULL << 63)
 #define CHSC_SEI_NT2    (1ULL << 61)
 
 struct chsc_sei {
@@ -291,7 +291,8 @@ struct chsc_sei {
         u32 reserved1;
         u64 ntsm;                       /* notification type mask */
         struct chsc_header response;
-        u32 reserved2;
+        u32 :24;
+        u8 nt;
         union {
                 struct chsc_sei_nt0_area nt0_area;
                 struct chsc_sei_nt2_area nt2_area;
@@ -496,17 +497,17 @@ static int __chsc_process_crw(struct chsc_sei *sei, u64 ntsm)
                                 css_schedule_eval_all();
                         }
 
-                        switch (sei->ntsm) {
-                        case CHSC_SEI_NT0:
+                        switch (sei->nt) {
+                        case 0:
                                 chsc_process_sei_nt0(&sei->u.nt0_area);
-                                return 1;
-                        case CHSC_SEI_NT2:
+                                break;
+                        case 2:
                                 chsc_process_sei_nt2(&sei->u.nt2_area);
-                                return 1;
+                                break;
                         default:
-                                CIO_CRW_EVENT(2, "chsc: unhandled nt (nt=%08Lx)\n",
-                                              sei->ntsm);
-                                return 0;
+                                CIO_CRW_EVENT(2, "chsc: unhandled nt=%d\n",
+                                              sei->nt);
+                                break;
                         }
                 } else {
                         CIO_CRW_EVENT(2, "chsc: sei failed (rc=%04x)\n",
@@ -537,15 +538,7 @@ static void chsc_process_crw(struct crw *crw0, struct crw *crw1, int overflow)
         sei = sei_page;
 
         CIO_TRACE_EVENT(2, "prcss");
-
-        /*
-         * The ntsm does not allow to select NT0 and NT2 together. We need to
-         * first check for NT2, than additionally for NT0...
-         */
-#ifdef CONFIG_PCI
-        if (!__chsc_process_crw(sei, CHSC_SEI_NT2))
-#endif
-                __chsc_process_crw(sei, CHSC_SEI_NT0);
+        __chsc_process_crw(sei, CHSC_SEI_NT0 | CHSC_SEI_NT2);
 }
 
 void chsc_chp_online(struct chp_id chpid)