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

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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
This commit is contained in:
Linus Torvalds 2016-06-20 10:18:58 -07:00
commit 97f78c7de8
2 changed files with 3 additions and 7 deletions
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8
arch/s390/kernel/perf_cpum_cf.c
View File

@ -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) {

2
arch/s390/mm/pgtable.c
View File

@ -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));