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

Pull s390 fixes from Martin Schwidefsky:
 "Two more bugs fixes for 4.7:

   - a KVM regression introduced with the pgtable.c code split

   - a perf issue with two hardware PMUs using a shared event context"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/cpum_cf: use perf software context for hardware counters
  KVM: s390/mm: Fix CMMA reset during reboot

2 files changed, 3 insertions, 7 deletions

diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index 59215c518f37..7ec63b1d920d 100644
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -649,6 +649,8 @@ static int cpumf_pmu_commit_txn(struct pmu *pmu)
 
 /* Performance monitoring unit for s390x */
 static struct pmu cpumf_pmu = {
+        .task_ctx_nr  = perf_sw_context,
+        .capabilities = PERF_PMU_CAP_NO_INTERRUPT,
         .pmu_enable   = cpumf_pmu_enable,
         .pmu_disable  = cpumf_pmu_disable,
         .event_init   = cpumf_pmu_event_init,
@@ -708,12 +710,6 @@ static int __init cpumf_pmu_init(void)
                 goto out;
         }
 
-        /* The CPU measurement counter facility does not have overflow
-         * interrupts to do sampling.  Sampling must be provided by
-         * external means, for example, by timers.
-         */
-        cpumf_pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
-
         cpumf_pmu.attr_groups = cpumf_cf_event_group();
         rc = perf_pmu_register(&cpumf_pmu, "cpum_cf", PERF_TYPE_RAW);
         if (rc) {
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 4324b87f9398..9f0ce0e6eeb4 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -437,7 +437,7 @@ void ptep_zap_unused(struct mm_struct *mm, unsigned long addr,
         pgste = pgste_get_lock(ptep);
         pgstev = pgste_val(pgste);
         pte = *ptep;
-        if (pte_swap(pte) &&
+        if (!reset && pte_swap(pte) &&
             ((pgstev & _PGSTE_GPS_USAGE_MASK) == _PGSTE_GPS_USAGE_UNUSED ||
              (pgstev & _PGSTE_GPS_ZERO))) {
                 ptep_zap_swap_entry(mm, pte_to_swp_entry(pte));